JP2013142923A - Traffic information display device, computer program, and traffic information display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traffic information display device, a computer program and a traffic information display method, which can display seriousness of congestion by comparing with a normal or past congestion state.SOLUTION: A distribution information generation unit 16 generates distribution information indicating a frequency of congestion length data for each of a plurality of congestion length sections of a road network in an arbitrary time zone on the basis of plural pieces of congestion length data stored in a storage unit 14. A congestion length calculation unit 12 calculates a total congestion length in the road network in the time zone. A display unit 15 displays information as to which of a plurality of congestion length sections of the distribution information in the same time zone the congestion length calculated by the congestion length calculation unit 12 falls into.

Description

  The present invention relates to a traffic information display device that displays traffic information related to a traffic jam, a computer program for realizing the traffic information display device, and a traffic information display method.

  Conventionally, traffic control centers, central management centers, and the like have grasped traffic information such as traffic congestion, traffic regulation, and traffic information to be controlled, and implement traffic signal control or traffic jam countermeasures in the road network.

  On the other hand, in order to support the driving of the driver, a navigation device that provides traffic information such as traffic congestion to the driver is mounted on the vehicle. Such a navigation device includes a small computer and a display screen, detects a travel distance and a traveling direction by a vehicle speed sensor or a direction sensor, updates the current position of the vehicle, and displays the current position of the vehicle on a road map. To do. Such a navigation device can also receive traffic jam information from a beacon while the vehicle is running, and display the traffic jam information on the route to the destination (see Patent Document 1).

  In urban traffic, in addition to those that occur at almost the same time on weekdays such as morning and evening commuting hours, drivers are cautious due to poor visibility due to heavy rain or typhoons, or accidents or earthquakes. Some of them suddenly occur due to a decrease in the capacity of roads or intersections due to traffic restrictions.

  Contrary to such normal traffic jams, suddenly occurring traffic jams are detected early and priority control (policy control) in the congestion direction by traffic signal control, or detouring by traffic information provision It is desirable to mitigate the expansion of traffic congestion by taking measures such as promotion. Also, since there is a lot of traffic demand during morning and evening traffic jams, small factors such as parked cars or broken cars can trigger heavy traffic jams. A quick response is required.

Japanese Patent Laid-Open No. 5-80696

  However, although early detection of traffic jams and implementation of countermeasures that are different from normal or past traffic jams are expected to contribute to alleviating traffic jams, current traffic jams are more serious than normal or past traffic jams. There was no way to determine whether or not.

  The present invention has been made in view of such circumstances, and to realize a traffic information display device capable of displaying the seriousness of traffic jams compared to normal or past traffic jam situations, and the traffic information display device. It is an object to provide a computer program and a traffic information display method.

  A traffic information display device according to a first aspect of the present invention is a traffic information display device that displays traffic information related to traffic jams, and collects the length of traffic jams in an arbitrary time zone of one or more specific road networks over a predetermined period. Storage means for storing a plurality of traffic jam length data obtained in the above manner, and the traffic jam in the time zone of the road network for each of a plurality of traffic jam length sections based on the plurality of traffic jam length data stored in the storage means The traffic jam length information generating means for generating distribution information indicating the frequency of the long data, the traffic jam length calculating means for calculating the traffic jam length in the time zone of the road network, and the traffic jam length calculated by the traffic jam length calculating means And a display means for displaying information indicating which traffic jam length section of the plurality of traffic jam length sections of the distribution information is present.

  The traffic information display device according to a second aspect of the present invention is characterized in that, in the first aspect, the display means displays the distribution information generated by the traffic jam length information generation means.

  The traffic information display device according to a third aspect is the distribution according to the first or second aspect, wherein the traffic jam length information generating means indicates a cumulative frequency obtained by accumulating the frequency of the traffic jam length data for each of the plurality of traffic jam length categories. Information is generated, and the display means is configured to display information indicating in which of the cumulative frequencies of the distribution information the congestion length calculated by the congestion length calculation means. Features.

  In the traffic information display device according to a fourth invention, in the third invention, the display means displays a cumulative curve indicating a cumulative frequency of the distribution information, and a traffic jam length calculated by the traffic jam length calculating means in association with the cumulative curve. It is characterized by displaying the code | symbol shown.

  The traffic information display device according to a fifth aspect is the distribution according to the fourth aspect, wherein the traffic jam length information generating means divides a cumulative frequency obtained by accumulating the frequency of the traffic jam length data into a plurality of frequency regions and indicates the cumulative frequency. Information is generated, and the display means changes the code for each frequency area according to which of the plurality of frequency areas the congestion length calculated by the congestion length calculation means is. It is configured to display.

  The traffic information display device according to a sixth aspect of the present invention is the traffic information display device according to the fourth aspect or the fifth aspect, wherein the traffic zone length change amount indicating the traffic zone length change in the time zone of the road network and a time zone different from the time zone. Storage means for storing a plurality of traffic jam length change amount data collected over a plurality of times, and based on the plurality of traffic jam length change amount data stored in the storage means, a plurality of times in the time zone of the road network A traffic jam length change amount information generating means for generating distribution information indicating a cumulative frequency obtained by accumulating the frequency of the traffic jam length change amount data for each traffic length change amount section, and the time length of the road network by the traffic jam length calculating means. A change amount calculating means for calculating a traffic jam length in a time zone different from the time zone, and calculating a traffic jam length change amount indicating a change in the traffic jam length in the time zone and a time zone different from the time zone; The amount of change in the traffic jam length calculated by the change amount calculation means is the above amount. Characterized in that it comprises a determination means for determining whether the one of the cumulative frequency of the information.

  In the traffic information display device according to a seventh aspect based on the sixth aspect, the traffic jam length change amount information generating means divides a cumulative frequency obtained by accumulating the frequency of the traffic jam length change amount data into a plurality of frequency areas, and the cumulative frequency Distribution information is generated, and the display unit is configured to display the code in a different manner for each frequency region according to a determination result of the determination unit. To do.

  The traffic information display device according to an eighth invention is the traffic information display device according to the sixth invention or the seventh invention, calculated by the percentile value of the traffic jam length category corresponding to the traffic jam length calculated by the traffic jam length calculating means and / or the change amount calculating means. It is characterized by comprising specifying means for specifying a road network to be displayed by the display means among the plurality of specific road networks based on a percentile value of a congestion length change amount category corresponding to a traffic jam length change amount.

  The traffic information display device according to a ninth aspect of the present invention is the traffic information display device according to any one of the first to eighth aspects, wherein the display unit displays a percentile value of a traffic jam length category corresponding to the traffic jam length calculated by the traffic jam length calculation unit. It is configured to display.

  A traffic information display device according to a tenth aspect of the present invention is the traffic information display device according to any one of the sixth aspect to the eighth aspect, wherein the display unit is a traffic jam length change amount classification corresponding to the traffic jam length change amount calculated by the change amount calculation unit. The second percentile value is displayed.

  The traffic information display device according to an eleventh aspect is the distribution according to the first aspect, wherein the traffic jam length information generating means divides a cumulative frequency obtained by accumulating the frequency of the traffic jam length data into a plurality of frequency areas and indicates the cumulative frequency. Information is generated, the display means is configured to display one or more routes of the road network, and further, the traffic jam in the time zone of the route calculated by the traffic jam length calculation means. The route is configured to be displayed in a different manner depending on which of the plurality of frequency regions has a length.

  The traffic information display device according to a twelfth aspect of the present invention is the traffic information display device according to the first aspect or the eleventh aspect, wherein a traffic jam length change amount indicating a traffic jam length change in a time zone different from the time zone of the road network and a predetermined time period Storage means for storing a plurality of traffic jam length change amount data collected over a plurality of times, and based on the plurality of traffic jam length change amount data stored in the storage means, a plurality of times in the time zone of the road network A traffic jam length change amount information generating means for generating distribution information indicating a cumulative frequency obtained by accumulating the frequency of the traffic jam length change amount data for each traffic length change amount section, and the time length of the road network by the traffic jam length calculating means. And a change amount calculating means for calculating a traffic jam length in a time zone different from the time zone and calculating a traffic jam length change amount indicating a change in the traffic jam length in the time zone and a time zone different from the time zone. , The traffic jam length change amount information generating means, The accumulated frequency obtained by accumulating the frequency of the stagnation change amount data is divided into a plurality of frequency areas, and distribution information indicating the accumulated frequency is generated, and the display means includes one or more routes of the road network. In addition, the route is displayed in a different manner depending on which of the plurality of frequency regions the traffic jam length change amount of the route calculated by the change amount calculation means is in. It is configured.

  A computer program according to a thirteenth aspect of the invention is a computer program for causing a computer to display traffic information relating to traffic jams, wherein the computer sets a traffic jam length in an arbitrary time zone of one or more specific road networks for a predetermined period. Generating distribution information indicating the frequency of the congestion length data in the time zone of the road network for each of a plurality of congestion length sections, based on the plurality of congestion length data collected over And a step of displaying information indicating in which traffic jam length section of the plurality of traffic jam length sections of the distribution information the traffic jam length in the time zone of the road network is executed.

  A traffic information display method according to a fourteenth aspect of the present invention is a traffic information display method by a traffic information display device for displaying traffic information relating to traffic jams, wherein a traffic jam length in an arbitrary time zone of one or a plurality of specific road networks is predetermined. A plurality of congestion length data collected over a period of time are stored, and based on the stored plurality of congestion length data, the road network in the time zone of the road network for each congestion length section A step of generating distribution information indicating a frequency of traffic jam length data; a step of calculating a traffic jam length in the time zone of the road network; and the calculated traffic jam length is any of a plurality of traffic jam length categories of the distribution information. And a step of displaying information indicating whether the traffic jam is in the traffic jam length category.

  In the first invention, the thirteenth invention, and the fourteenth invention, a plurality of congestion length data obtained by collecting the congestion length in an arbitrary time zone of one or a plurality of specific road networks over a predetermined period. Remember. A specific road network is the entire traffic control area, a designated area, a prefectural border link, or a link near the entrance of an expressway. For example, if the traffic control area is Tokyo, the entire Tokyo area, 23 wards, It can be a route group (up and down) such as a Keiyo road, a link group on the border of the prefecture, a link group connected to the entrance / exit of the expressway or the metropolitan expressway. The arbitrary time zone may be, for example, 5 minutes obtained by dividing 24 hours a day every 5 minutes (for example, 5 minutes from 15:00 to 15:05). Further, the predetermined period may be a period that allows the statistical value of the traffic jam length to be obtained, and is, for example, the past two years or three years. Further, the predetermined period may be divided into weekdays, Saturdays and holidays. For example, assuming that the predetermined period is 3 years on weekdays (about 250 days of the year) and the time zone is 5 minutes, the traffic length data in units of 5 minutes divided into 288 (= 24 × 60/5) is about 750 pieces. (= 3 × 250) Collected and stored.

  The traffic jam length information generating means generates distribution information indicating the frequency of traffic jam length data in the time zone of the road network for each of a plurality of traffic jam length sections based on the stored traffic jam length data. The congestion length classification is a value obtained by dividing the congestion length by a unit distance (for example, the total extension distance of the designated route by a numerical value of about 20 to 50, and depending on the total extension distance of the route, 1 km, 5 km, 10 km. For example, if the unit distance is 5 km, it is divided into 0 to 5 km, 5 to 10 km, and 10 to 15 km. The distribution information is, for example, a frequency distribution (bar graph) indicating the frequency of traffic jam length data for each traffic jam length segment, or a cumulative frequency curve or a line graph indicating the cumulative frequency of traffic jam length data for each traffic jam length segment.

  The traffic jam length calculating means calculates the traffic jam length of the road network in the time zone. The calculated traffic jam length represents the current traffic jam status in the time zone (for example, 5 minutes from 15:00 to 15:05). The display means sets the congestion length in any of the plurality of congestion length sections of the distribution information in the same time period (for example, 5 minutes from time 15:00 to 15:05). Displays information indicating whether there is any. For example, if the congestion length section is divided into 20 sections, the current congestion length calculated is displayed in which congestion length section (for example, the third section from the top, or the fifth section, etc.) To do. As a result, it is possible to know how many categories from the top the current traffic jam length corresponds to the statistical value of the past traffic jam length, and the current seriousness of traffic jam can be visually represented. That is, the seriousness of the traffic jam can be displayed in comparison with the normal or past traffic jam situation.

  In the second invention, the display means displays the generated distribution information. The distribution information is, for example, a frequency distribution (bar graph) indicating the frequency of traffic jam length data for each traffic jam length segment, or a cumulative frequency curve or a line graph indicating the cumulative frequency of traffic jam length data for each traffic jam length segment. By displaying the distribution information, the current congestion length can be compared with the past congestion length distribution (statistical value), so it is possible to visually indicate whether the current congestion situation is more serious or not. it can.

  In the third invention, the traffic jam length information generating means generates distribution information indicating a cumulative frequency obtained by accumulating the frequency of the traffic jam length data for each of a plurality of traffic jam length categories. The distribution information is, for example, an accumulated frequency curve or a line graph indicating the accumulated frequency of the congestion length data of each congestion length section. The display means displays information indicating whether the calculated current traffic jam length is in the cumulative frequency of the distribution information. For example, if the congestion length section is divided into 20 sections, the current congestion length calculated is displayed in which congestion length section (for example, the third section from the top, or the fifth section, etc.) To do. As a result, it is possible to know how many categories from the top the current traffic jam length corresponds to the statistical value of the past traffic jam length, and the current seriousness of traffic jam can be visually represented. That is, the seriousness of the traffic jam can be displayed in comparison with the normal or past traffic jam situation.

  In the fourth invention, the display means includes a cumulative curve indicating the cumulative frequency of the distribution information, and a code indicating the current congestion length calculated in association with the cumulative curve (for example, on or near the cumulative curve). indicate. That is, the display means displays a cumulative curve (including a line graph) as the traffic length distribution information collected in the past and a position (on the cumulative curve or in the vicinity of the cumulative curve) representing the calculated current traffic jam length. ) Is displayed. Thereby, it is possible to visually grasp how serious the current traffic jam is compared to the past traffic jam. For example, it can be seen that the more urgent (more serious) the traffic is, the more the code is on or near the upper cumulative curve.

  In the fifth aspect, the traffic jam length information generating means generates distribution information indicating the cumulative frequency by dividing the cumulative frequency obtained by accumulating the frequency of the traffic jam length data into a plurality of frequency regions. The plurality of frequency areas are, for example, a first frequency area with a cumulative frequency within the top 5%, a second frequency area with a cumulative frequency within the top 5% to within the top 15%, and a third frequency with a cumulative frequency below the top 15% It can be divided into areas. The display means displays the code in a different manner for each frequency region depending on which of the plurality of frequency regions the calculated current traffic jam length is in. The different modes include, for example, changing the display color of the code and changing the size or shape of the code.

  When the calculated current traffic jam length is in the first frequency area within the top 5% of the cumulative frequency, the code is displayed in red, and the cumulative frequency is in the second frequency area within the top 5% to the top 15%. In this case, the code can be displayed in yellow, and the code can be displayed in green when the cumulative frequency is in the third frequency region below the upper 15%. Thereby, the current seriousness of traffic congestion can be visually represented.

  In the sixth aspect of the present invention, a traffic jam length change amount indicating a traffic jam length change in an arbitrary time zone of one or a plurality of specific road networks and a time zone different from the time zone is collected over a predetermined period. A plurality of obtained traffic jam length change amount data is stored. The time zone different from the time zone is, for example, 5 minutes before, 10 minutes before, or 15 minutes before, if the time zone is 5 minutes. For example, if the time zone is 5 minutes from 15:00 to 15:05, the different time zone 15 minutes ago may be 5 minutes from 14:45 to 14:50. In other words, the amount of change in the traffic jam length is the amount of change between the traffic jam length at the time 15:05 and the traffic jam length at the time 14:50 in the past 15 minutes, and when the traffic jam length decreases, the traffic jam length change amount. Becomes a negative value, and when the traffic jam length increases, the traffic jam length change amount becomes a positive value. For example, assuming that the predetermined period is 3 years on weekdays (about 250 days of the year) and the time zone is 5 minutes, the traffic length change amount data in units of 5 minutes divided into 288 (= 24 × 60/5) As with the traffic jam length data, about 750 (= 3 × 250) are collected and stored.

  The traffic length change amount information generating means accumulates the frequency of the traffic length change amount data for each of the plurality of traffic length change amount categories in the time zone of the road network based on the stored traffic length change amount data. Distribution information indicating the cumulative frequency is generated. The traffic length change amount classification is a value obtained by dividing the traffic length change amount by a unit distance (for example, the difference between the maximum value and the minimum value of the past traffic length change amount by a numerical value of about 20 to 50, for example, 1 km, 2 km, 3 km, etc.), for example, if the unit distance is 1 km, 0 to 1 km, 1 to 2 km, 2 to 3 km,. The decrease is divided as −1 to 0 km, −2 to −1 km, −3 to −2 km,. The distribution information is, for example, a frequency distribution (bar graph) indicating the frequency of traffic jam length variation data for each traffic jam length variation segment, or a cumulative frequency curve indicating the cumulative frequency of traffic jam length variation data for each traffic jam length variation segment, or For example, a line graph.

  The change amount calculation means calculates a traffic jam length in the time zone of the road network and a time zone different from the time zone, and indicates a traffic jam length change in the time zone and a time zone different from the time zone. The long change amount is calculated. For example, when the traffic jam length (total traffic jam length) at time 15:05 is 315 km, and the traffic jam length (total traffic jam length) at time 14:50 15 minutes ago is 310 km, the traffic jam length change amount is 5 km. It is.

  The determination means determines which of the accumulated frequency of distribution information the calculated traffic jam length change amount is. For example, it can be seen that as the calculated amount of change in the traffic jam length is higher in the cumulative frequency, the traffic jam length increases more rapidly, and the increase tendency of the traffic jam is earlier than the normal or past state. Thereby, it can be determined whether the increase tendency of traffic congestion is quicker than the normal or past increase tendency.

  In the seventh invention, the traffic jam length change amount information generating means classifies the cumulative frequency obtained by accumulating the frequency of the traffic jam length change amount data into a plurality of frequency areas, and generates distribution information indicating the cumulative frequency. The plurality of frequency regions can be classified into, for example, a first frequency region having an accumulated frequency within the upper 5% and a second frequency region having an accumulated frequency lower than the upper 5%. A display means displays a code | symbol in a different aspect for every frequency area | region according to the determination result of a determination means. The different modes include, for example, blinking or non-flashing the code and changing the blinking time.

  When the calculated current traffic jam length change amount is in the first frequency area within the top 5% of the cumulative frequency, a sign is displayed blinking, and the traffic jam length change amount is the second lower than the top 5% of the cumulative frequency. If it is in the frequency area, the code can be displayed non-flashing. Instead of the flashing display and the non-flashing display, each can be a flashing display with a fast cycle and a flashing display with a slow cycle. Thereby, the seriousness of the current tendency of increasing traffic congestion can be visually represented.

  As another classification method, the first frequency area with the cumulative frequency within the top 5%, the second frequency area with the cumulative frequency below the top 5% and within the top 15%, and the cumulative frequency from the top 15% When the calculated current congestion length change amount is in the first frequency area, the code is blinked at a fast cycle, and the calculated current congestion length change amount is the second frequency area. If it is in the area, the code can be blinked at a slow cycle, and if the calculated current traffic jam length change amount is in the third frequency area, the code can be made non-flashing. Thereby, the seriousness of the current tendency of increasing traffic congestion can be expressed in three stages.

  In the eighth invention, the specifying means includes a plurality of percentile values of the traffic jam length category corresponding to the calculated traffic jam length and / or a percentile value of the traffic jam length change category corresponding to the calculated traffic jam length change amount. Among the specific road networks, the road network to be displayed is specified. The road network to be displayed from among a plurality of road networks is identified by, for example, (1) specifying a predetermined number (for example, 5) from the ones whose percentile value of the traffic jam length category corresponding to the calculated traffic jam length is close to the top. (2) A predetermined number (for example, 5) is identified from the closest percentile value of the traffic length change amount category corresponding to the calculated traffic length change amount, (3) The traffic length category corresponding to the calculated traffic length Identifying a predetermined number (for example, 5) of the weighted sum of the percentile value of the traffic jam and the percentile value of the traffic jam length change amount category corresponding to the calculated traffic jam length change amount. (4) Calculated traffic jam length The percentile value of the traffic jam length category corresponding to is within the predetermined threshold (for example, 15%) from the top, and the percentile value of the traffic jam length variation category corresponding to the calculated traffic jam length change amount is close to the top. The number (e.g., five) identifying, (5) Other road network specified by the traffic manager may be performed by a method like. Thereby, it is possible to preferentially display a road network having a high degree of urgency for countermeasures against congestion among a plurality of road networks.

  In the ninth invention, the display means displays the percentile value of the traffic jam length category corresponding to the calculated current traffic jam length. As a result, it is possible to easily grasp the degree of seriousness of traffic jams compared to normal or past traffic jams.

  In the tenth invention, the display means displays the percentile value of the traffic jam length change amount category corresponding to the calculated current traffic jam length change amount. Thereby, it is possible to easily grasp how serious the increase tendency of the traffic jam is compared with the normal or past increase trend of the traffic jam.

  In the eleventh aspect of the invention, the traffic jam length information generating means generates the distribution information indicating the cumulative frequency by dividing the cumulative frequency obtained by accumulating the frequency of the traffic jam length data into a plurality of frequency regions. The plurality of frequency areas are, for example, a first frequency area with a cumulative frequency within the top 5%, a second frequency area with a cumulative frequency within the top 5% to within the top 15%, and a third frequency with a cumulative frequency below the top 15% It can be divided into areas. The display means displays one or more routes of the road network. The unit to be displayed can be, for example, a route unit (road unit). And a display means displays the said route in a different aspect according to which the congestion length in the said time slot | zone of the one or some route calculated by the traffic length calculation means exists in a some frequency area | region. The different modes are, for example, changing the display color of the route and changing the thickness of the route.

  For example, if the calculated current traffic jam length is in the first frequency area within the top 5% of the cumulative frequency, the route is displayed in red, and the calculated current traffic jam length is within the top 5% to the top 15% of the cumulative frequency The route can be displayed in yellow when it is in the second frequency region, and the route can be displayed in green when the calculated current traffic jam length is in the third frequency region below the top 15% of the cumulative frequency. Thereby, the current seriousness of traffic congestion on each route can be visually represented.

  In the twelfth aspect of the present invention, a traffic jam length change amount indicating a traffic jam length change in an arbitrary time zone of one or a plurality of specific road networks and a time zone different from the time zone is collected over a predetermined period. A plurality of obtained traffic jam length change amount data is stored. The time zone different from the time zone is, for example, 5 minutes before, 10 minutes before, or 15 minutes before, if the time zone is 5 minutes. For example, if the time zone is 5 minutes from 15:00 to 15:05, the different time zone 15 minutes ago may be 5 minutes from 14:45 to 14:50. In other words, the amount of change in the traffic jam length is the amount of change between the traffic jam length at the time 15:05 and the traffic jam length at the time 14:50 in the past 15 minutes, and when the traffic jam length decreases, the traffic jam length change amount. Becomes a negative value, and when the traffic jam length increases, the traffic jam length change amount becomes a positive value. For example, assuming that the predetermined period is 3 years on weekdays (about 250 days of the year) and the time zone is 5 minutes, the traffic length change amount data in units of 5 minutes divided into 288 (= 24 × 60/5) As with the traffic jam length data, about 750 (= 3 × 250) are collected and stored.

  The traffic length change amount information generating means accumulates the frequency of the traffic length change amount data for each of the plurality of traffic length change amount categories in the time zone of the road network based on the stored traffic length change amount data. Distribution information indicating the cumulative frequency is generated. The traffic length change amount classification is a value obtained by dividing the traffic length change amount by a unit distance (for example, the difference between the maximum value and the minimum value of the past traffic length change amount by a numerical value of about 20 to 50, for example, 1 km, 2 km, 3 km, etc.), for example, if the unit distance is 1 km, 0 to 1 km, 1 to 2 km, 2 to 3 km,. The decrease is divided as −1 to 0 km, −2 to −1 km, −3 to −2 km,. The distribution information is, for example, a frequency distribution (bar graph) indicating the frequency of traffic jam length variation data for each traffic jam length variation segment, or a cumulative frequency curve indicating the cumulative frequency of traffic jam length variation data for each traffic jam length variation segment, or For example, a line graph.

  The change amount calculation means calculates a traffic jam length in the time zone of the road network and a time zone different from the time zone, and indicates a traffic jam length change in the time zone and a time zone different from the time zone. The long change amount is calculated. For example, when the traffic jam length (total traffic jam length) at time 15:05 is 315 km, and the traffic jam length (total traffic jam length) at time 14:50 15 minutes ago is 310 km, the traffic jam length change amount is 5 km. It is.

  The traffic jam length change amount information generation means classifies the cumulative frequency obtained by accumulating the frequency of the traffic jam length change amount data into a plurality of frequency areas, and generates distribution information indicating the cumulative frequency. The plurality of frequency regions can be classified into, for example, a first frequency region having an accumulated frequency within the upper 5% and a second frequency region having an accumulated frequency lower than the upper 5%. The display means displays one or more routes of the road network. The unit to be displayed can be, for example, a route unit (road unit). Then, the display unit displays the route in a different manner depending on which of the plurality of frequency regions the traffic jam length change amount of the one or more routes calculated by the change amount calculating unit is. The different modes include, for example, blinking or non-flashing the route and changing the blinking time.

  Then, when the calculated current traffic jam length change amount is in the first frequency area within the top 5% of the cumulative frequency, the route is displayed blinking, and the traffic jam length change amount is the second lower than the top 5% of the cumulative frequency. When in the frequency area, the route can be displayed in a non-flashing manner. Instead of the flashing display and the non-flashing display, each can be a flashing display with a fast cycle and a flashing display with a slow cycle. Thereby, the seriousness of the increasing tendency of the current traffic congestion on each route can be visually represented.

  As another classification method, the first frequency area with the cumulative frequency within the top 5%, the second frequency area with the cumulative frequency below the top 5% and within the top 15%, and the cumulative frequency from the top 15% When the calculated current congestion length change amount is in the first frequency area, the route is blinked at a fast cycle, and the calculated current congestion length change amount is the second frequency area. If it is in the area, the route can be blinked at a slow cycle, and if the calculated current traffic jam length change amount is in the third frequency area, the route can be made non-flashing. Thereby, the seriousness of the increasing tendency of the current traffic congestion on the route can be expressed in more detail in three stages.

  According to the present invention, it is possible to display the seriousness of traffic jams compared to normal or past traffic jam situations.

It is a block diagram which shows an example of a structure of the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows an example of the distribution information which shows the frequency of the congestion length data which a distribution information generation part produces | generates. It is explanatory drawing which shows an example of the distribution information which shows the frequency of the congestion length variation | change_quantity data which a distribution information generation part produces | generates. It is explanatory drawing which shows the 1st example of the traffic condition display by the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows the 2nd example of the traffic condition display by the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows the 3rd example of the traffic condition display by the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows an example of the determination method of the jam length change amount by the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows the 4th example of the traffic condition display by the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows the 5th example of the traffic condition display by the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows the 6th example of the traffic condition display by the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows the 7th example of the traffic condition display by the traffic information display apparatus of this Embodiment. It is explanatory drawing which shows an example of the present traffic congestion condition. It is explanatory drawing which shows an example of the traffic condition display on the road map by the traffic information display apparatus of this Embodiment. It is a flowchart which shows the process sequence of the traffic information display apparatus of this Embodiment. It is a flowchart which shows the process sequence of the traffic information display apparatus of this Embodiment.

  Hereinafter, a traffic information display device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an example of the configuration of the traffic information display device 100 of the present embodiment. The traffic information display device 100 according to the present embodiment includes a control unit 10 that controls the entire device, an interface unit 11, a traffic jam length calculation unit 12, a traffic jam length change amount calculation unit 13, a storage unit 14, a display unit 15, and distribution information generation. Unit 16, percentile value calculation unit 17, and the like.

  The interface unit 11 has a function as an interface that acquires congestion length data of each road in the traffic control target road network from an external device (for example, a signal control device, a traffic signal controller, a vehicle sensor, or the like). The acquired traffic jam length data includes current traffic jam length data and past traffic jam length data.

  The storage unit 14 stores a plurality of traffic jam length data acquired by the interface unit 11. More specifically, the storage unit 14 stores a plurality of congestion length data obtained by collecting congestion lengths in an arbitrary time zone of one or a plurality of specific road networks over a predetermined period.

  A specific road network is the entire traffic control area, a designated area, a prefectural border link, or a link near the entrance of an expressway. For example, if the traffic control area is Tokyo, the entire Tokyo area, 23 wards, It can be a route group (up and down) such as a Keiyo road, a link group at the border of the prefecture, a link group connected to the entrance of the expressway or the metropolitan expressway. The arbitrary time zone may be, for example, 5 minutes obtained by dividing 24 hours a day every 5 minutes (for example, 5 minutes from 15:00 to 15:05). Further, the predetermined period may be a period that allows the statistical value of the traffic jam length to be obtained, and is, for example, the past two years or three years. Further, the predetermined period may be divided into weekdays, Saturdays and holidays. For example, assuming that the predetermined period is 3 years on weekdays (about 250 days of the year) and the time zone is 5 minutes, the traffic length data in units of 5 minutes divided into 288 (= 24 × 60/5) is about 750 pieces. (= 3 × 250) is collected and stored in the storage unit 14.

  In addition, the storage unit 14 collects a traffic jam length change amount indicating a traffic jam length change in an arbitrary time zone of one or a plurality of specific road networks and a time zone different from the time zone, over a predetermined period. A plurality of traffic jam length change amount data is stored. The time zone different from the time zone is, for example, 5 minutes before, 10 minutes before, or 15 minutes before, if the time zone is 5 minutes. For example, if the time zone is 5 minutes from 15:00 to 15:05, the different time zone 15 minutes ago may be 5 minutes from 14:45 to 14:50.

  In other words, the amount of change in the traffic jam length is the amount of change between the traffic jam length at the time 15:05 and the traffic jam length at the time 14:50 in the past 15 minutes, and when the traffic jam length decreases, the traffic jam length change amount. Becomes a negative value, and when the traffic jam length increases, the traffic jam length change amount becomes a positive value. For example, assuming that the predetermined period is 3 years on weekdays (about 250 days of the year) and the time zone is 5 minutes, the traffic length change amount data in units of 5 minutes divided into 288 (= 24 × 60/5) As with the traffic jam length data, about 750 (= 3 × 250) are collected and stored in the storage unit 14.

  In the following description, a method for displaying the result of evaluation of traffic congestion in a designated area of the traffic control area (referred to as area S for convenience) as a specific road network will be described.

  The congestion length is roughly divided into morning and evening peak hours, nighttime and daytime, and the daily characteristics are similar. Even during the daytime, characteristics can be seen in time units, such as traffic congestion at 12 o'clock. Therefore, it is desirable that the statistical values are aggregated not in large time units as in daily units but in units of time units or less. As for the number of days in the past, the number of data increases as the number of days increases, but the traffic situation changes with the year, so if the number of days is too long, the result does not represent the current trend.

  Next, creation (generation) of traffic length distribution information based on traffic length statistics will be described. The distribution information generation unit 16 generates distribution information indicating the frequency of the congestion length data in an arbitrary time zone of the road network for each of the plurality of congestion length categories based on the plurality of congestion length data stored in the storage unit 14. It functions as a traffic jam length information generation means.

  That is, the distribution information generation unit 16 generates distribution information indicating the frequency of the congestion length data in an arbitrary time zone of the region S for each of a plurality of congestion length categories based on the plurality of congestion length data stored in the storage unit 14. Generate.

  FIG. 2 is an explanatory diagram illustrating an example of distribution information indicating the frequency of the traffic jam length data generated by the distribution information generation unit 16. In FIG. 2, the horizontal axis indicates the traffic jam length category, and the vertical axis indicates the frequency that is the number of traffic jam length data corresponding to the traffic jam length category. The congestion length classification is a value obtained by dividing the congestion length by a unit distance (for example, the total extension distance of the designated route by a numerical value of about 20 to 50, and depending on the total extension distance of the route, 1 km, 5 km, 10 km. For example, if the unit distance is 5 km, it is divided into 0 to 5 km, 5 to 10 km, and 10 to 15 km.

  As shown in FIG. 2, the distribution information is, for example, the frequency of the congestion length data of each congestion length section at the time 15:05 (more precisely, from 15:00:01 to 15: 05: 5). Or a cumulative frequency curve or a line graph indicating the cumulative frequency of the congestion length data of each congestion length section.

  In the present embodiment, a method of creating a traffic jam length statistical value is described below assuming that a statistical value in units of 5 minutes (arbitrary time zone) is created from the traffic jam history for the past three years. In other words, the statistical value is one day, such as time 00:01:00 to 00:05:00, 00:05:00 to 00:10:00, ... 23: 55: 001 to 24:00:00. It is created as traffic information (statistical value) in units of 5 minutes divided into 288.

  In the statistical value every 5 minutes, there is congestion length data of about 750 days (= 250 days × 3 years) if it is a weekday of the past three years. On Saturdays and Sundays and holidays, there are about 150 congestion length data.

  In addition, the congestion length in an arbitrary time zone (for example, 5 minutes) is the maximum value and average of the congestion length data in the minimum unit of measurement (for example, 6 when measuring once every 50 seconds). Value, minimum value or upper Pth value. For example, in the case of Tokyo, the statistical value of traffic jam length is created for the entire Tokyo area, 23 wards, all areas subject to traffic control such as routes, divided areas, and representative routes, and once a day, once a month, once a year Etc. are updated regularly.

  As described above, the frequency distribution as the distribution information illustrated in FIG. 2 and the cumulative curve of the frequency are the time 15:05 of the region S (more precisely, if the time zone is 5 minutes, the time 15:00 15:05) represents the distribution state of 750 (3 years) congestion length data collected during the past 3 years (weekdays), and the total value of the congestion length (total congestion length) occurred between 15:05).

  Next, creation (generation) of the distribution information of the traffic jam length change amount based on the statistical value of the traffic jam length change amount will be described. Based on the plurality of congestion length variation data stored in the storage unit 14, the distribution information generation unit 16 calculates the frequency of the congestion length variation data for each of the plurality of congestion length variation categories in an arbitrary time zone of the road network. It has a function as traffic jam length change amount information generation means for generating distribution information indicating the accumulated frequency.

  That is, based on a plurality of traffic jam length change amount data stored in the storage unit 14, an accumulated frequency obtained by accumulating the frequency of the traffic jam length change amount data for each of a plurality of traffic jam length change amount categories in an arbitrary time zone of the region S is obtained. The distribution information shown is generated. Here, the arbitrary time zone is the same time zone as the congestion length distribution information, and is the time 15:05 (between times 15:00:00 and 15:05) as in the example of FIG.

  FIG. 3 is an explanatory diagram illustrating an example of distribution information indicating the frequency of the traffic jam length change amount data generated by the distribution information generation unit 16. In FIG. 3, the horizontal axis indicates the traffic jam length change amount category, and the vertical axis indicates the frequency as the number of traffic jam length change amount data corresponding to the traffic jam length change rate category. The traffic length change amount classification is a value obtained by dividing the traffic length change amount by a unit distance (for example, the difference between the maximum value and the minimum value of the past traffic length change amount by a numerical value of about 20 to 50, for example, 1 km, 2 km, 3 km, etc.), for example, if the unit distance is 1 km, 0 to 1 km, 1 to 2 km, 2 to 3 km,. The decrease is divided as −1 to 0 km, −2 to −1 km, −3 to −2 km,.

  As shown in FIG. 3, the distribution information is, for example, a frequency distribution (bar graph) indicating the frequency of traffic jam length change amount data of each traffic jam length change amount category at 15:05 and 15 minutes before, or each traffic jam length change. It is a cumulative frequency curve or a line graph showing the cumulative frequency of the traffic jam length change amount data of the quantity category.

  The amount of change in the traffic jam length is the difference between the current traffic jam length and the traffic jam length at the time point in the past, for example, an integer multiple of an arbitrary time zone (for example, 5 minutes) from the present time. For example, if the current time is 5 minutes from 15:00:01 to 15: 00: 0, the congestion length at 15:05: 00 and the congestion length at 14:55:00, 15 minutes before It is a difference. When traffic congestion decreases, it becomes negative, and when traffic increases, it becomes positive. In addition, it is not limited to the past 15 minutes ago, The past 5 minutes ago, 10 minutes ago, 20 minutes ago, etc. may be sufficient.

  The statistical value of the traffic jam length change amount is created as traffic information (statistical value) in units of 5 minutes by dividing one day into 288, similarly to the statistical value of the traffic jam length. In the statistical value every 5 minutes, there is traffic length change amount data of about 750 days (= 250 days × 3 years) if it is a weekday of the past three years. On Saturdays and Sundays and holidays, there is about 150 traffic length change data.

  In addition, for example, in the case of Tokyo, the statistical value of the amount of change in the congestion length in an arbitrary time zone (for example, 5 minutes) is the entire Tokyo area, the 23 wards, the entire traffic control target area such as a route, divided areas, and representative It is created for each route, and is updated regularly such as once a month, once a month, once a year.

  As described above, the frequency distribution and the cumulative frequency curve as the distribution information illustrated in FIG. 3 are the total traffic jam length at the time 15:05 in the region S and the total traffic jam length at the time 14:50 15 minutes ago. Represents the distribution state of 750 (3 years) congestion length variation data collected during the past 3 years (weekdays).

  Next, the current traffic jam evaluation and display will be described. The current (current) traffic jam length is the traffic jam length in the same time zone as the traffic length distribution information time zone, and the current (current) traffic jam length change amount is the distribution information of the traffic jam length change amount. This is the amount of change in the traffic jam length in the same time zone.

  The traffic jam length calculation unit 12 has a function as traffic jam length calculation means for calculating the traffic jam length in an arbitrary time zone of the road network. That is, the traffic jam length calculation unit 12 calculates the traffic jam length in the time zone of the region S (the same time zone as the distribution information). Here, the traffic jam length is a total traffic jam length in the region S obtained by adding up the traffic jam lengths on the roads in the region S. The calculated traffic jam length represents the current traffic jam status in the time zone (for example, 5 minutes from 15:00 to 15:05).

  The display unit 15 has a function as a display unit, and under the control of the control unit 10, the traffic length in the time zone calculated by the traffic jam length calculation unit 12 is the same (for example, from 15:00 to 15th). : 5 minutes (up to 05), which traffic congestion length category of the plurality of traffic congestion length categories of the distribution information is displayed.

  For example, when the traffic jam length category is divided into 20 categories, the current traffic jam length calculated by the traffic jam length calculation unit 12 is any traffic jam length category of the distribution information (for example, the third category from the top or the fifth category) , Etc.) is displayed. As a result, it is possible to know how many categories from the top the current traffic jam length corresponds to the statistical value of the past traffic jam length, and the current seriousness of traffic jam can be visually represented. That is, the seriousness of the traffic jam can be displayed in comparison with the normal or past traffic jam situation.

  The display unit 15 displays the distribution information generated by the distribution information generation unit 16. The distribution information is, for example, a frequency distribution (bar graph) indicating the frequency of traffic jam length data for each traffic jam length segment, or a cumulative frequency curve or a line graph indicating the cumulative frequency of traffic jam length data for each traffic jam length segment. By displaying the distribution information, the current congestion length can be compared with the past congestion length distribution (statistical value), so it is possible to visually indicate whether the current congestion situation is more serious or not. it can.

  Hereinafter, a display example of the traffic congestion state by the traffic information display device 100 of the present embodiment will be described. FIG. 4 is an explanatory view showing a first example of traffic jam display by the traffic information display device 100 of the present embodiment. In FIG. 4, as in FIG. 2, the horizontal axis indicates the traffic jam length category, and the vertical axis indicates the frequency that is the number of traffic jam length data corresponding to the traffic jam length category. In FIG. 4, a frequency distribution (bar graph) and a frequency cumulative curve are distribution information at time 15:05, which is the same as the distribution information in FIG.

  By associating the current traffic jam length with the traffic jam length category to represent the past traffic jam length distribution, it is possible to show how serious the current traffic jam length is relative to the past traffic jam length distribution. . In FIG. 4, the total congestion length of the region S at the present time (time 15:05) is displayed so that it can be compared with the distribution information. For example, as shown in FIG. 4, the display unit 15 displays the current traffic jam length calculated by the traffic jam length calculation unit 12 in any traffic jam length category (for example, the third category from the top or the fifth category). (In the example of FIG. 4, the bar line associated with the traffic jam length section is a code indicating the current traffic jam length). As a result, it is possible to know how many categories from the top the current traffic jam length corresponds to the statistical value of the past traffic jam length, and the current seriousness of traffic jam can be visually represented. That is, the seriousness of the traffic jam can be displayed in comparison with the normal or past traffic jam situation.

  As shown in FIG. 4, the display unit 15 displays a cumulative curve indicating the cumulative frequency of the distribution information and calculates it in association with the cumulative curve (for example, on the cumulative curve or in the vicinity of the cumulative curve). A code indicating the current traffic jam length (a bar and a circle shown in FIG. 4) is displayed. That is, the display unit 15 displays a cumulative curve (including a line graph) as the distribution information of the congestion length collected in the past and a position where the calculated current congestion length is in which congestion length category. A sign is displayed on the cumulative curve or in the vicinity of the cumulative curve. In the example of FIG. 4, the current traffic jam length is associated with the traffic jam length category and displayed as a bar, but other codes such as a circle may be used without being limited to the bar. Further, the current traffic jam length is associated with the cumulative curve and displayed as a bar line and a circle on the cumulative curve, but it may be a bar line alone or only a circle. In addition, if the current traffic jam length is in the range where the current traffic jam length is in the statistical value of the past traffic jam length or the traffic jam length classification of the distribution, it will be displayed near the cumulative curve instead of the cumulative curve. You can also Moreover, as a code | symbol, it is not limited to a bar wire and a circle mark, A square mark, a triangle mark, etc. may be sufficient, and another design, a character, etc. may be sufficient.

  Thereby, it is possible to visually grasp how serious the current traffic jam is compared to the past traffic jam. For example, it can be seen that the more urgent (more serious) the traffic is, the more the code is on or near the upper cumulative curve.

  The distribution information generation unit 16 generates distribution information by dividing the cumulative frequency of distribution information into a plurality of frequency regions. The plurality of frequency areas are, for example, a first frequency area with a cumulative frequency within the top 5%, a second frequency area with a cumulative frequency within the top 5% to within the top 15%, and a third frequency with a cumulative frequency below the top 15% It can be divided into areas.

  The display unit 15 displays the code in a different manner for each frequency region depending on which of the plurality of frequency regions the current traffic jam length calculated by the traffic jam length calculation unit 12 is. The different modes include, for example, changing the display color of the code and changing the size or shape of the code. In the example of FIG. 4, since the current traffic jam length is in the first frequency area within 5% from the top on the cumulative frequency curve, the code is displayed in red (black circle in the example of FIG. 4). Thereby, the current seriousness of traffic congestion can be visually represented.

  Also, as shown in FIG. 4, it is possible to display how much the current traffic jam length is from the top on the cumulative frequency curve (in the example of FIG. 4, the top 3%). That is, the display unit 15 displays the percentile value of the traffic jam length category corresponding to the current traffic jam length. As a result, it is possible to easily grasp the degree of seriousness of traffic jams compared to normal or past traffic jams. Further, the current total traffic jam length in the region S (450 km in the example of FIG. 4) can be displayed.

  FIG. 5 is an explanatory diagram showing a second example of a traffic jam display by the traffic information display device 100 of the present embodiment. The difference from the first example of FIG. 4 is that in the example of FIG. 5, the current traffic jam length is in the second frequency region within 15% from the top on the cumulative frequency curve. Then, it is displayed with a circle with a pattern). Thereby, the current seriousness of traffic congestion can be visually represented.

  Further, as shown in FIG. 5, it is also possible to display how much the current traffic jam length is from the top on the cumulative frequency curve (top 12% in the example of FIG. 5).

  FIG. 6 is an explanatory diagram showing a third example of traffic jam display by the traffic information display device 100 of the present embodiment. The difference from the first example of FIG. 4 is that in the example of FIG. 6, the current traffic jam length is in the third frequency area below 15% from the top on the cumulative frequency curve, so the sign is green (in FIG. 6). In the example, it is displayed with a white circle). Thereby, the current seriousness of traffic congestion can be visually represented.

  Further, as shown in FIG. 6, it is also possible to display how much the current traffic jam length is from the top on the cumulative frequency curve (in the example of FIG. 6, the top 45%). In this way, by color-coding the display of the sign, it is possible to visually and intuitively understand that the current traffic jam is more severe as the color changes from green to yellow to red, and to deal with traffic jams. This information is useful in determining the urgency of the measure. For example, if the traffic manager can take a traffic jam countermeasure 30 minutes earlier, the traffic jam reduction effect will be considerably large.

  In the example of FIGS. 4 to 6, the display color is changed to three colors of red, yellow, and green, but the display color is not limited to these, and the congestion length is Other display modes may be used as long as the level of urgency and the level of seriousness can be distinguished. Moreover, a code | symbol is not limited to a round mark, Another shape, a figure, and a code | symbol may be sufficient.

  Next, the display of the current traffic jam situation when the traffic jam length change amount is also considered will be described.

  The traffic jam length change amount calculation unit 13 calculates the traffic jam length change amount data for each of a plurality of traffic jam length change amount categories in an arbitrary time zone of the road network based on the plurality of traffic jam length change amount data stored in the storage unit 14. It has a function as a traffic jam length change amount information generation means for generating distribution information indicating the accumulated frequency. That is, the traffic jam length (total traffic jam length) in the time zone different from the time zone in the region S is calculated by the traffic jam length calculation unit 12, and the traffic jam length change amount calculation unit 13 A traffic jam length change amount indicating a traffic jam length change in a time zone different from the time zone is calculated. For example, when the total traffic jam length at time 15:05 is 315 km and the total traffic jam length at time 14:50 15 minutes before the past is 310 km, the traffic jam length change amount is 5 km.

  The traffic jam length change amount calculation unit 13 also has a function as a determination unit that determines which of the accumulated frequency of distribution information the calculated traffic jam length change amount is. For example, it can be seen that as the calculated amount of change in the traffic jam length is higher in the cumulative frequency, the traffic jam length increases more rapidly, and the increase tendency of the traffic jam is earlier than the normal or past state. Thereby, it can be determined whether the increase tendency of traffic congestion is quicker than the normal or past increase tendency.

  FIG. 7 is an explanatory diagram illustrating an example of a method for determining a change in the traffic jam length by the traffic information display device 100 according to the present embodiment. In FIG. 7, as in FIG. 3, the horizontal axis indicates the traffic jam length change amount category, and the vertical axis indicates the frequency that is the number of traffic jam length change amount data corresponding to the traffic jam length change amount category. In FIG. 7, the frequency distribution (bar graph) and the cumulative frequency curve are distribution information at time 15:05, which is the same as the distribution information in FIG.

  The distribution information generation unit 16 generates distribution information by dividing the cumulative frequency of distribution information into a plurality of frequency regions. The plurality of frequency regions can be classified into, for example, a first frequency region having an accumulated frequency within the upper 5% and a second frequency region having an accumulated frequency lower than the upper 5%.

  In the example of FIG. 7, as an example, the current traffic time change amount (time 15:05) (Δ mark in FIG. 7) is within 5% from the top in the cumulative frequency curve. Hereinafter, a display example of a traffic jam situation when the traffic jam length change amount is considered will be described.

  FIG. 8 is an explanatory diagram showing a fourth example of a traffic jam display by the traffic information display device 100 of the present embodiment. The example of FIG. 8 shows a case in which the amount of change in traffic jam length is taken into consideration in the example of FIG. As shown in FIG. 8, the display unit 15 assigns a code for each frequency region according to a determination result as to which of the cumulative frequencies of the distribution information the traffic jam length variation calculated by the traffic jam length variation calculation unit 13 exists. Display differently. The different modes include, for example, blinking or non-flashing the code and changing the blinking time.

  Then, when the current traffic jam length change amount calculated by the traffic jam length change amount calculation unit 13 is in the first frequency area within the upper 5% of the cumulative frequency, the code is displayed blinking, and the current traffic jam length change amount calculated. Is in the second frequency region below the upper 5% of the cumulative frequency, the code can be displayed in a non-flashing manner.

  In the example of FIG. 8, the traffic jam length is within the upper 5% and the traffic jam length change amount is within the upper 5% (upper 3% in the example of FIG. 8).

  Instead of the flashing display and the non-flashing display, each can be a flashing display with a fast cycle and a flashing display with a slow cycle. Thereby, the seriousness of the current tendency of increasing traffic congestion can be visually represented.

  FIG. 9 is an explanatory view showing a fifth example of traffic jam display by the traffic information display device 100 of the present embodiment. The example of FIG. 9 shows a case in which the amount of change in the traffic jam length is considered in the example of FIG. In the example of FIG. 9, the traffic jam length is within the upper 15% and the traffic jam length change amount is within the upper 5% (upper 3% in the example of FIG. 9).

  FIG. 10 is an explanatory diagram showing a sixth example of traffic jam display by the traffic information display device 100 of the present embodiment. The example of FIG. 10 shows a case in which the amount of change in traffic jam length is considered in the example of FIG. In the example of FIG. 10, the traffic jam length is less than the top 15%, and the amount of change in the traffic jam length is within the top 5% (in the example of FIG. 10, the top 3%).

  When the current traffic jam length is not so much as in the example of FIG. 10 but the traffic jam length change amount is increasing rapidly, the symbols are the example of FIG. 10, the example of FIG. As in the example, it can be expected that the blinking of green will shift from blinking yellow to blinking red. Since the traffic manager can pay attention from a state where the length of the traffic jam is not so much (the state where the sign is green), the traffic manager can promptly deal with the initial occurrence of the traffic jam.

  As another classification method, the first frequency area with the cumulative frequency within the top 5%, the second frequency area with the cumulative frequency below the top 5% and within the top 15%, and the cumulative frequency from the top 15% When the calculated current congestion length change amount is in the first frequency area, the code is blinked at a fast cycle, and the calculated current congestion length change amount is the second frequency area. If it is in the area, the code can be blinked at a slow cycle, and if the calculated current traffic jam length change amount is in the third frequency area, the code can be made non-flashing. Thereby, the seriousness of the current tendency of increasing traffic congestion can be expressed in three stages.

  In the above-described example, the traffic jam situation is configured to be displayed together with a frequency distribution of past traffic jam lengths, a cumulative frequency curve, and the like. However, the traffic jam status display method is not limited to the above-described example. It can also be a form display.

  FIG. 11 is an explanatory diagram showing a seventh example of traffic jam display by the traffic information display device 100 of the present embodiment. In the example of FIG. 11, the traffic situation of the three target areas, the entire area, the designated area P, and the Q road ascending, is displayed as a road network, but four or more target areas such as other areas or routes are displayed. You can also.

  As shown in FIG. 11, the current congestion situation of the entire area indicates that the total congestion length is 880 km and is in the top 18% (below 15%) of the distribution of the past total congestion length. Further, the traffic jam length change amount is +75 km (the total traffic jam length increases by 75 km during 15 minutes), indicating that it is in the top 25% (below 5%) of the distribution of the past traffic jam length change amount. In this case, the character or background is displayed in green non-flashing.

  Further, the current traffic jam situation in the designated area P indicates that the total traffic jam length is 580 km and is in the top 3% (within 5%) of the distribution of the past total traffic jam length. Further, the traffic jam length change amount is +60 km (total traffic jam length increases by 60 km in 15 minutes), indicating that it is in the top 6% (below 5%) of the past traffic jam length change distribution. In this case, the character or background is displayed in red and non-flashing.

  Further, the current traffic condition on the Q road indicates that the total traffic jam length is 37 km and is in the top 10% (within 15%) of the past total traffic jam length distribution. Further, the traffic jam length change amount is +3 km (the total traffic jam length increases by 3 km during 15 minutes), which indicates that it is in the top 3% (within 5%) of the distribution of the past traffic jam length change amount. In this case, the character or background is displayed in yellow blinking.

  The display unit 15 displays the percentile value of the traffic jam length change amount category corresponding to the current traffic jam length change amount. Thereby, it is possible to easily grasp how serious the increase tendency of the traffic jam is compared with the normal or past increase trend of the traffic jam.

  As a method for grasping the entire traffic jam, major regions such as the entire prefecture or the location of the prefectural office can be considered, and either or both can be designated. Since there are a plurality of representative routes, a predetermined number (for example, three, five, etc.) may be automatically selected and displayed from the top with priority on the most congested route or a route with high urgency. . Hereinafter, a method for specifying a route (target area) will be described.

  The control unit 10 has a function as a specifying unit that specifies a road network preferentially displayed on the display unit 15 among a plurality of specific road networks. That is, the control unit 10 generates a plurality of specific road networks based on the percentile value of the traffic jam length segment corresponding to the current traffic jam length and / or the percentile value of the traffic jam length variation category corresponding to the current traffic jam length variation. Among them, the road network to be displayed is specified.

  The percentile value calculation unit 17 calculates the percentile value of the congestion length category corresponding to the current congestion length calculated by the congestion length calculation unit 12. In addition, the percentile value calculation unit 17 calculates the percentile value of the traffic jam length change amount category corresponding to the current traffic jam length change amount calculated by the traffic jam length change amount calculation unit 13.

  Several methods can be considered for the definition of congestion, and the following methods can be considered for specifying a road network to be displayed from among a plurality of road networks. For example, (first identification method) a predetermined number (for example, 5) is identified from the closest percentile value of the congestion length category corresponding to the calculated congestion length, (second identification method) calculated congestion length change amount A predetermined number (e.g., 5) is identified from the highest percentile value of the traffic jam length variation category corresponding to the (3rd identification method), and the percentile value of the traffic jam length category corresponding to the calculated traffic jam length is calculated. A predetermined number (for example, 5) is specified from the weighted sum value with the percentile value of the traffic jam length variation category corresponding to the traffic jam length variation amount, for example, (fourth identification method) corresponding to the calculated traffic jam length. The percentile value of the traffic jam length category is within a predetermined threshold (for example, 15%) from the top, and the percentile value of the traffic jam length change category corresponding to the calculated traffic jam length change amount is a predetermined number from the top For example, five) identifying can be performed (fifth particular method) Other road network specified by the traffic manager, by the method equal.

  FIG. 12 is an explanatory diagram showing an example of a current traffic jam situation. FIG. 12 shows the situation of the traffic jam length and the traffic jam length change amount on roads A, B, C, D, and E, respectively. In the example of FIG. 12, assuming that three routes (regions) are preferentially selected, when the above-described first specifying method is used, the percentile value of the traffic jam length category corresponding to the current traffic jam length is close to the top. Therefore, road A going up (upper 5%), road D going down (upper 7%), and road C going up (upper 8%) are specified.

  In addition, when using the second specifying method described above, since the percentile value of the traffic jam length change amount category corresponding to the current traffic jam length change amount is specified from the top, the road A descent (upper 3%), Road B going up (upper 4%) and road D going up (upper 6%) are specified.

  In addition, when the third specifying method described above is used, the weighted sum of the percentile value of the traffic jam length category corresponding to the current traffic jam length and the percentile value of the traffic jam length change category corresponding to the current traffic jam length change amount. Since the values (assuming both weights are equal) are specified from the top, the road D up (upper 16%), road E up (upper 18%), and road C up (upper 19%) are specified.

  In addition, when the above-described fourth specifying method is used, the percentile value of the traffic jam length category corresponding to the current traffic jam length is within a predetermined threshold (for example, 15%) from the top, and the current traffic jam length change amount is set. Since the corresponding percentile value of the traffic congestion length change category is specified from the top, road D ascent (congestion length: top 10%, traffic change: top 6%), road E ascent (congestion length: top 9%) , Traffic change amount: top 9%), road C going up (congestion length: top 8%, traffic change amount: top 11%).

  Thereby, it is possible to preferentially display a road network having a high degree of urgency for countermeasures against congestion among a plurality of road networks.

  In the above example, the distribution information of the traffic jam length is displayed, and the current traffic jam length is compared with the past traffic jam length distribution (statistical value) to visually indicate whether the traffic jam situation is serious or not However, the configuration that visually expresses the traffic jam condition is not limited to the above-described example, and can be realized by, for example, a map display.

  FIG. 13 is an explanatory diagram showing an example of a traffic jam status display on a road map by the traffic information display device 100 of the present embodiment. As shown in FIG. 13, for example, it is assumed that routes R1, R2, R3, R4, R5, R6, and R7 in the road network are displayed on the screen.

  The distribution information generation unit 16 generates distribution information indicating the cumulative frequency by dividing the cumulative frequency obtained by accumulating the frequency of the traffic jam length data into a plurality of frequency regions. The plurality of frequency areas are, for example, a first frequency area with a cumulative frequency within the top 5%, a second frequency area with a cumulative frequency within the top 5% to within the top 15%, and a third frequency with a cumulative frequency below the top 15% It can be divided into areas.

  The display unit 15 displays one or more routes of the road network. The unit to be displayed can be, for example, a route unit (road unit). All areas, designated areas, prefectural border links, or links near the entrance / exit of expressways can be excluded.

  The display unit 15 displays the route in a different manner depending on which of the plurality of frequency regions the traffic jam length of the one or more routes calculated in the traffic jam length calculation unit 12 is in the time zone. . The different modes are, for example, changing the display color of the route and changing the thickness of the route.

  For example, the display unit 15 displays the route in red when the calculated current traffic jam length is in the first frequency area within the upper 5% of the cumulative frequency, and the calculated current traffic jam length is higher in the cumulative frequency. The route is displayed in yellow when it is in the second frequency area within 5% to the top 15%, and when the calculated current traffic jam length is in the third frequency area below the top 15% of the cumulative frequency Can be displayed in green.

  In the example of FIG. 13, the route R1 is red, the route R2 is green, the route R3 is yellow, the route R4 is yellow, the route R5 is red, the route R6 is green, and the route R7 is green. Thereby, the current seriousness of traffic congestion on each route can be visually represented.

  In addition, the distribution information generation unit 16 divides the cumulative frequency obtained by accumulating the frequency of the congestion length change amount data into a plurality of frequency areas, and generates distribution information indicating the cumulative frequency. The plurality of frequency regions can be classified into, for example, a first frequency region having an accumulated frequency within the upper 5% and a second frequency region having an accumulated frequency lower than the upper 5%.

  The display unit 15 displays the route in a different manner depending on which of the plurality of frequency regions the traffic length change amount of one or more routes calculated by the traffic length change amount calculation unit 13 is. The different modes include, for example, blinking or non-flashing the route and changing the blinking time.

  For example, the display unit 15 blinks the route when the calculated current traffic jam length change amount is in the first frequency area within the top 5% of the cumulative frequency, and the calculated traffic jam length change amount is the cumulative frequency. The route can be displayed in a non-flashing manner in the second frequency region below the top 5% of the.

  In the example of FIG. 13, routes R1, R2, and R3 are displayed blinking, and routes R4, R5, R6, and R7 are displayed non-flashing. Instead of the flashing display and the non-flashing display, each can be a flashing display with a fast cycle and a flashing display with a slow cycle. Thereby, the seriousness of the increasing tendency of the current traffic congestion on each route can be visually represented.

  As another classification method, the first frequency area with the cumulative frequency within the top 5%, the second frequency area with the cumulative frequency below the top 5% and within the top 15%, and the cumulative frequency from the top 15% When the calculated current congestion length change amount is in the first frequency area, the route is blinked at a fast cycle, and the calculated current congestion length change amount is the second frequency area. If it is in the area, the route can be blinked at a slow cycle, and if the calculated current traffic jam length change amount is in the third frequency area, the route can be made non-flashing. Thereby, the seriousness of the increasing tendency of the current traffic congestion on the route can be expressed in more detail in three stages.

  Next, operation | movement of the traffic information display apparatus 100 of this Embodiment is demonstrated. 14 and 15 are flowcharts showing the processing procedure of the traffic information display apparatus 100 of the present embodiment. The control unit 10 determines whether or not it is a traffic jam calculation cycle (S11), and if it is not a traffic jam calculation cycle (NO in S11), the process of step S11 is continued. The traffic jam calculation period is the same as an arbitrary time zone, for example, 5 minutes. If a time zone other than 5 minutes is used as an arbitrary time zone, the traffic jam calculation period may be changed in the same manner.

  When it is a traffic jam calculation period (YES in S11), the control unit 10 calculates the traffic jam length of the entire area, the designated area, and the designated route (S12). The calculated traffic jam length is the total traffic jam length in the entire area, the designated area, and the designated route. The calculated traffic jam length data is stored in the storage unit 14 as a statistical value for calculating the traffic jam length change amount and generating distribution information.

  The control unit 10 generates traffic length distribution information for the entire area, the specified area, and the specified route (S13), and the calculated traffic length is within the upper first threshold (for example, 5%) of the traffic length distribution (distribution information). It is determined whether or not (S14).

  When the calculated traffic jam length is within the upper first threshold of the traffic jam length distribution (YES in S14), the control unit 10 sets the display color to red (S15). If the calculated traffic jam length is not within the upper first threshold of the traffic jam length distribution (NO in S14), the control unit 10 determines that the calculated traffic jam length is the upper second threshold (for example, 15) of the traffic jam length distribution (distribution information). %) Is determined (S16).

  When the calculated traffic jam length is within the upper second threshold of the traffic jam length distribution (YES in S16), the control unit 10 sets the display color to yellow (S17). If the calculated traffic jam length is not within the upper second threshold of the traffic jam length distribution (NO in S16), the control unit 10 sets the display color to green (S18).

  The control unit 10 calculates the traffic jam length change amount of the entire area, the designated area, and the designated route (S19). The control part 10 produces | generates the distribution information of the traffic jam length change amount of the whole area, a designated area, and a designated route (S20).

  The control unit 10 determines whether or not the calculated traffic jam length change amount is within the upper third threshold (for example, 5%) of the traffic jam length change distribution (distribution information) (S21). When the calculated traffic jam length change amount is within the upper third threshold of the traffic jam length change distribution (YES in S21), the control unit 10 sets the display type to blink (S22). When the calculated traffic jam length variation is not within the upper third threshold of the traffic jam variation distribution (NO in S21), the control unit 10 sets the display type to non-flashing (S23).

  The control unit 10 displays the distribution information of the entire area, the specified area, and the specified route (S24), displays the current traffic congestion state with the display color and display type set on the distribution information (S25), and ends the process. 14 and 15 are repeatedly performed at the traffic jam calculation cycle, the distribution information to be displayed and the current traffic jam length are updated at the traffic jam calculation cycle. In addition, when displaying the traffic situation, a predetermined number of routes or areas may be specified and displayed with priority by the above-described first to fifth specifying methods from among a plurality of routes or areas. Good.

  As described above, in the traffic information display device 100 according to the present embodiment, the current traffic jam is evaluated using the statistical value of the traffic jam length and the traffic jam length change amount, and the evaluation result is obtained by the traffic manager or others. Can be shown visually to the user.

  The traffic information display device 100 of this embodiment can also be realized using a general-purpose computer including a CPU, a RAM, and the like. That is, as shown in FIGS. 14 and 15, a computer program that defines each processing procedure is recorded on a computer program recording medium such as a CD, a DVD, or a USB memory, and the computer program is stored in a RAM provided in the computer. The traffic information display device 100 can be realized on the computer by loading and executing the computer program by the CPU.

  The traffic information display device 100 of the above-described embodiment is installed in a traffic control center, a central management center, or the like, but this embodiment is also applied to a device mounted on a vehicle or the like such as a navigation device. can do.

  The disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 10 Control part 11 Interface part 12 Congestion length calculation part 13 Congestion length change amount calculation part 14 Storage part 15 Display part 16 Distribution information generation part 17 Percentile value calculation part

Claims (14)

A traffic information display device that displays traffic information related to traffic jams,
Storage means for storing a plurality of congestion length data obtained by collecting congestion lengths in an arbitrary time zone of one or a plurality of specific road networks over a predetermined period;
Congestion length information generating means for generating distribution information indicating the frequency of the congestion length data in the time zone of the road network for each of a plurality of congestion length sections based on the plurality of congestion length data stored in the storage means ,
A traffic jam length calculating means for calculating a traffic jam length in the time zone of the road network;
A traffic information display device, comprising: a display unit configured to display information indicating which traffic jam length calculated by the traffic jam length calculation unit is in one of a plurality of traffic jam length categories of the distribution information. The display means includes
2. The traffic information display device according to claim 1, wherein the traffic information display device is configured to display the distribution information generated by the traffic jam length information generating means. The traffic jam length information generating means
Distribution information indicating a cumulative frequency obtained by accumulating the frequency of the traffic jam length data for each of the traffic jam length categories is generated;
The display means includes
The traffic according to claim 1 or 2, wherein the traffic length calculated by the traffic length calculating means is configured to display information indicating which of the cumulative frequencies of the distribution information is present. Information display device. The display means includes
The cumulative curve indicating the cumulative frequency of the distribution information and a code indicating the traffic jam length calculated by the traffic jam length calculating means in association with the cumulative curve are displayed. Traffic information display device. The traffic jam length information generating means
The cumulative frequency obtained by accumulating the frequency of the traffic jam length data is divided into a plurality of frequency areas, and distribution information indicating the cumulative frequency is generated.
The display means includes
The code is configured to be displayed in a different manner for each frequency area according to which of the plurality of frequency areas the traffic jam length calculated by the traffic length calculation unit is. Item 5. The traffic information display device according to Item 4. A memory for storing a plurality of congestion length variation data obtained by collecting a congestion length variation indicating a congestion length variation in the time zone of the road network and a time zone different from the time zone, over a predetermined period. Means,
Based on the plurality of congestion length variation data stored in the storage means, the cumulative frequency obtained by accumulating the frequency of the congestion length variation data for each of the plurality of congestion length variation categories in the time zone of the road network is shown. Congestion length change amount information generating means for generating distribution information;
The traffic jam length calculation means calculates a traffic jam length in the time zone of the road network and a time zone different from the time zone, and shows a change in the traffic jam length in the time zone and a time zone different from the time zone. A change amount calculating means for calculating a long change amount;
The traffic information display according to claim 4 or 5, further comprising: a determination unit that determines which of the cumulative frequencies of the distribution information the traffic jam length change amount calculated by the change amount calculation unit is. apparatus. The traffic length change information generation means
The cumulative frequency obtained by accumulating the frequency of the traffic jam length change amount data is divided into a plurality of frequency areas, and distribution information indicating the cumulative frequency is generated.
The display means includes
The traffic information display device according to claim 6, wherein the code is displayed in a different manner for each frequency region in accordance with a determination result of the determination unit.   Based on the percentile value of the traffic jam length category corresponding to the traffic jam length calculated by the traffic jam length calculation unit and / or the percentile value of the traffic jam length change category corresponding to the traffic jam length change amount calculated by the change amount calculation unit, The traffic information display apparatus according to claim 6 or 7, further comprising: a specifying unit that specifies a road network to be displayed by the display unit among a plurality of specific road networks. The display means includes
The traffic information according to any one of claims 1 to 8, wherein the traffic information is configured to display a percentile value of a congestion length category corresponding to the congestion length calculated by the congestion length calculation means. Display device. The display means includes
9. The configuration according to claim 6, wherein a percentile value of a traffic jam length change amount category corresponding to the traffic jam length change amount calculated by the change amount calculation means is displayed. The traffic information display device described. The traffic jam length information generating means
The cumulative frequency obtained by accumulating the frequency of the traffic jam length data is divided into a plurality of frequency areas, and distribution information indicating the cumulative frequency is generated.
The display means includes
One or more routes of the road network are displayed;
Furthermore, the route is configured to be displayed in a different manner depending on which of the plurality of frequency regions the traffic jam length of the route calculated by the traffic jam length calculating means is in the time zone. The traffic information display device according to claim 1. A memory for storing a plurality of congestion length variation data obtained by collecting a congestion length variation indicating a congestion length variation in the time zone of the road network and a time zone different from the time zone, over a predetermined period. Means,
Based on the plurality of congestion length variation data stored in the storage means, the cumulative frequency obtained by accumulating the frequency of the congestion length variation data for each of the plurality of congestion length variation categories in the time zone of the road network is shown. Congestion length change amount information generating means for generating distribution information;
The traffic jam length calculation means calculates a traffic jam length in the time zone of the road network and a time zone different from the time zone, and shows a change in the traffic jam length in the time zone and a time zone different from the time zone. A change amount calculating means for calculating a long change amount,
The traffic jam length change amount information generating means includes:
The cumulative frequency obtained by accumulating the frequency of the traffic jam length change amount data is divided into a plurality of frequency areas, and distribution information indicating the cumulative frequency is generated.
The display means includes
One or more routes of the road network are displayed;
Further, the route is configured to be displayed in a different manner depending on which of the plurality of frequency regions the amount of change in the traffic jam length of the route calculated by the change amount calculating means is. The traffic information display device according to claim 1 or 11. A computer program for causing a computer to display traffic information about traffic jams,
On the computer,
Based on a plurality of congestion length data obtained by collecting congestion lengths in an arbitrary time zone of one or a plurality of specific road networks over a predetermined period, the road network Generating distribution information indicating the frequency of the traffic jam length data in a time zone;
And a step of displaying information indicating which congestion length section of the plurality of congestion length sections of the distribution information is present in the time zone of the road network. A traffic information display method by a traffic information display device that displays traffic information about traffic jams,
A plurality of congestion length data obtained by collecting congestion lengths in an arbitrary time zone of one or a plurality of specific road networks over a predetermined period;
Generating distribution information indicating the frequency of the congestion length data in the time zone of the road network for each of a plurality of congestion length sections, based on the stored congestion length data;
Calculating a traffic jam length in the time zone of the road network;
Displaying the information indicating which traffic jam length section of the plurality of traffic jam length sections of the distribution information is in the traffic information display method.

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