JP2004280320A - Traffic information display device and method for operating operation control center - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traffic information providing service and a traffic information display device for reducing the update frequency of traffic information, and securing the precision of the traffic information to be provided. <P>SOLUTION: A traffic information precision deciding means 105 compares the past traffic information stored in a storage means 104 with a traveling history, and whether or not the difference is extremely large is judged. When the difference is extremely large, and not less than the decision threshold of the deterioration of traffic information precision, a traffic information display device 101 requests the traffic information from a traffic information service center 108, and acquires new traffic information. The user of the traffic information display device improves the precision of the traffic information while reducing the frequency of the traffic information request. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a traffic information providing service and a traffic information display device, and more particularly to a communication type car navigation device and a service for car navigation, and a network type traffic information providing service.
[0002]
[Prior art]
In the conventional traffic information display device, it is necessary to always send a data transmission request to a traffic information server in order to display the latest traffic information, as shown as a conventional example in JP-A-11-313295. Further, in the above publication, in response to a data update request from the traffic information display device, the predicted time until the next data update is transmitted together with the traffic information data to reduce the transmission request frequency of the traffic information display device. A method for reducing the processing load on a server is disclosed.
[0003]
[Patent Document 1]
JP-A-11-313295
[0004]
[Problems to be solved by the invention]
By using the above-mentioned conventional technology, it is possible to reduce the communication access to which the traffic information display device is connected when the traffic information is not updated to the latest one in the server, but the accuracy of the traffic information displayed on the traffic information display device is reduced. Even though it was sufficient, there was a possibility that an access requesting information update to the traffic information server might occur.
[0005]
In view of the above problems, an object of the present invention is to provide a traffic information display device and a traffic information providing service that ensure the accuracy of provided traffic information while reducing the frequency of updating the traffic information.
[0006]
[Means for Solving the Problems]
The above-mentioned object is to compare the predicted reach distance information predicted based on the traffic information acquired and stored in the past with the actual vehicle travel history information, and when it is determined that the divergence of these information is large, This is achieved by a traffic information display device that requests the traffic information service center to acquire traffic information and downloads the traffic information.
[0007]
The above object is also achieved in that the operation management center causes the office terminal to acquire the traffic information generated around the vehicle and the location of the vehicle in response to the access from the office terminal, and stores the traffic information in the traffic information storage means, and stores the stored traffic information. If the discrepancy between the information and the newly collected traffic information around the vehicle is determined to be large, a method of causing the office terminal to acquire the position of the new vehicle and the traffic information newly generated around the vehicle is obtained. Achieved.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
First, embodiments of the traffic information providing service and the traffic information display device will be described.
[0009]
FIG. 1 is an example of a system configuration diagram of the traffic information display device. 101 is a vehicle-mounted or vehicle-mounted traffic information display device main body, 102 is a display, 106 is a two-way communication means for communicating with a communication network 107, and 108 is a traffic information service center connected to the communication network 107.
[0010]
The traffic information display device 101 performs communication by the two-way communication means 106, acquires traffic information from the traffic information service center 108 via the communication network 107, and displays the traffic information and traffic information obtained by processing the traffic information on the display 102. . At this time, the traffic information display device 101 includes the position detecting means 103, the readable / writable storage means 104, and the traffic information accuracy judging means 105, so that it is possible to provide traffic information while ensuring the accuracy of traffic information while reducing communication. I do.
[0011]
As an example of the position detecting means 103, a GPS (Global Positioning System) is given as a typical example, and the position of the traffic information display device 101 is detected, and the time at that time is detected. Representative examples of the readable / writable storage unit 104 include a memory, a hard disk drive, and the like, and store travel history information based on the position and time detected by the position detection unit 101 or traffic information acquired in the past. The traffic information accuracy determination unit 105 is a unit that compares the travel history information stored in the storage unit 104 with past traffic information as current traffic information, and requests acquisition of new traffic information.
[0012]
Examples of the two-way communication unit 106 include terminals such as a mobile phone, an optical beacon, Dedicated Short Range Communications (DSRC), satellite communication, and a wireless LAN (Local Area Network), and a traffic information service center via the communication network 107. 108 to obtain traffic information. The traffic information service center 108 is a service center that distributes traffic information in response to a traffic information acquisition request from the vehicle, and distributes traffic information collected by itself or traffic information acquired from an external organization.
[0013]
By using each of the above means, the traffic information display device 101 can ensure the accuracy of the provided traffic information while reducing the frequency of updating the traffic information. As an embodiment of the traffic information display apparatus 101, a communication type car navigation apparatus, a car navigation apparatus to which a two-way communication function can be connected, a PDA (Personal Digital Assistant) to be carried into a car and used, or the like can be considered.
[0014]
FIG. 2 is a processing flow for enabling the traffic information display device 101 of FIG. 1 to be mounted on an automobile and reducing the frequency of updating the traffic information while ensuring the accuracy of the provided traffic information. is there. Hereinafter, the flow of FIG. 2 will be described.
[0015]
Step 201 (= S201 in FIG. 2, hereinafter abbreviated as Sn): Acquires traffic information from a traffic information service center. As the traffic information to be acquired, the degree of traffic congestion, travel time, event / regulation information, cause information, and the like for each road link can be considered, and it is assumed that the traffic information has a format shown in FIG. Here, the distribution format of the traffic information is defined as the information on the road link, but the road link may be represented by a column of latitude and longitude. In this case, the traffic information is converted into a format as shown in FIG. 12 inside the traffic information display device. The acquired traffic information is displayed on the display 102 such as by being superimposed on a map, and is stored in the storage unit 104 as past traffic information.
[0016]
S202: The position and time detected by the position detection means 103 are integrated, converted into travel distance and elapsed time information, and stored in the storage means 104 as travel history information.
The process of S202 is performed at a cycle equal to or shorter than the cycle of detecting the position information, and the traveling distance and the elapsed time information are sequentially updated. Further, the travel distance and the elapsed time information are calculated and a map matching process is performed to obtain a road link corresponding to the position of the vehicle.
[0017]
S203: The past traffic information stored in the storage means 104 is compared with the travel history, and it is determined whether or not the difference is large. The traffic information accuracy determination means 105 compares a planned reach distance based on past traffic information at a certain time with a travel distance based on an actual vehicle travel history. When the difference between the differences is large and is equal to or larger than a predetermined determination value of the traffic information accuracy decrease, the traveling distance based on the actual vehicle traveling history is determined to be large with the traffic information acquired in the past, that is, the past traffic information It is determined that the accuracy has decreased, and the process proceeds to S204. When the deviation is small, that is, when it is determined that the deviation is not large, the process returns to S202 and returns to the loop for calculating the traveling history. A specific processing method will be described with reference to FIG. 11, and data of FIGS.
[0018]
FIG. 11 is a graph comparing the past traffic information with the travel history. In FIG. 11, the vertical axis represents distance, the horizontal axis represents time, a thin line 1101 represents an expected arrival distance based on past traffic information, and a thick line 1102 represents travel history information.
[0019]
FIG. 12 illustrates a format of traffic information. FIG. 12 shows the traffic congestion degree, travel time, and other information at 17:05 which is the current time. In addition, the link 1 (from the beginning to the end of the graph in FIG. 11; the same applies hereinafter) is passed. It takes 200 seconds to travel through link 2 and 400 seconds to pass through link 2. In addition, it can be seen that the passage through the start end of the link 4 is after 1200 seconds (= 200 + 400 + 600 seconds). Here, it is supposed that the planned arrival distance at 900 seconds (= 15 minutes), that is, at 18:05 in the future is calculated based on the traffic information at 17:50 at present. This is the forecast at 17:50. Since it is predicted in FIG. 12 that the end of the link 2 will pass after 600 seconds (200 + 400 seconds), after passing the end of the link 2 at 18:05 after 900 seconds, that is, the link 3 It is expected that 300 seconds have passed since passing the start end. Since the travel time of all the processes of the link 3 is 600 seconds, if 300 seconds have passed after passing the start end of the link 3, it is assumed that the vehicle travels 300s / 600s of all the processes of the link 3. Can be expected.
[0020]
Here, it is assumed that the distance of each road link is known by having a map in the traffic information display device, and that the distance of each road link is link 1 = 1200 m, link 2 = 1000 m, and link 3 = 2000 m. , Based on the start end of link 1 where the vehicle was present at 17:50, the expected reach L up to 18:05 is:
L = 3200m = 1200m + 1000m + 2000m × (300s / 600s)
It becomes. However, the scheduled travel distance of the link 3 is proportionally distributed according to the travel time.
[0021]
FIG. 13 exemplifies the traveling history information, in which the recording start time is 17:50 and the elapsed time is 900 seconds (= 15 minutes). Therefore, FIG. 13 shows the current information at 18:05 after 900 seconds (= 15 minutes) have passed from the past at 17:50. Since the actual moving distance of the vehicle at 18:05 is 2500 m, the actual position is 700 m (= 3200 m−2500 m) behind the scheduled arrival position. At this time, if the predetermined judgment value of the traffic information accuracy decrease is defined as, for example, 500 m in the traffic information accuracy judgment means 105 so that the deviation of the distance of 700 m is judged to be large, the past traffic information and the actual traffic The situation is determined to have deviated,
Proceed to S204.
[0022]
S204: Request traffic information from the traffic information service center 108 and acquire new traffic information. The new traffic information is again stored in the storage unit 104 as past traffic information, and the processing from S202 onward is repeated.
[0023]
Through the above processing, the traffic information display device 101 requests the traffic information update only when the accuracy is reduced, so that the frequency of the traffic information request can be reduced. Usually, the update period of the traffic information is about 5 minutes, but in the example described above, the update time interval is 15 minutes, and the frequency can be reduced by the traffic information accuracy determination. Regarding the accuracy of the traffic information, the accuracy of the traffic information in the traffic information display device 101 is higher than a certain level because the accuracy of the traffic information in the vehicle driving area is sequentially evaluated by the traffic information accuracy determination unit 105. Is guaranteed. Therefore, the traffic information display device can improve the accuracy of traffic information while reducing the frequency of traffic information requests.
[0024]
FIG. 3 is a screen transition example of the traffic information display device 101 shown in FIG. Reference numeral 301 denotes a screen of the traffic information display device, 304 denotes the current position of the vehicle, 305 denotes the road, 306 denotes the destination of the vehicle, and 307 denotes the route of the vehicle (for example, a recommended route calculated and displayed by navigation). Reference numeral 308 denotes traffic congestion, which is displayed beside the road and displayed for each traveling direction. When the difference between the past traffic information and the actual traffic information is detected as large by the traffic information accuracy determination means 105, the screen changes as indicated by 302 or 310.
[0025]
The screen 302 is a screen to which a transition is made when the setting is made to automatically acquire traffic information, and displays a display 309 to indicate that new traffic information is being acquired. The screen 310 is a screen to which a transition is made when traffic information acquisition is set to be performed manually, and displays a display such as 311 to confirm with the user whether or not the traffic information has been updated. When the update of the traffic information is approved on the screen 310, the screen transits to the screen 302 to acquire new traffic information.
[0026]
After the new traffic information is obtained, the screen transitions as shown in a screen 303, and the new traffic information is superimposed on the map. In the above, the example of superimposed display on the map is shown. However, when displaying traffic information limited to the planned vehicle travel route or displaying with text, it is also possible to display the status of traffic information update and whether or not it is present It is. By automating the update of the traffic information in this way, the user can acquire new traffic information while being free from the troublesome operation. On the other hand, by displaying so that the user can manually select whether or not to update, the user can intentionally reduce the communication frequency and reduce the communication cost.
[0027]
FIG. 4 is an example of a traffic information service center that realizes a traffic information service. The traffic information service center 401 is connected to the traffic information display device via the communication network 107. The traffic information collection source is also connected to the communication network 405, and periodically collects real-time traffic information. The traffic information service center 401 includes a traffic information prediction unit 402, a traffic information storage unit 403, and a traffic information distribution unit 404.
[0028]
The traffic information prediction means 402 stores the past traffic information in the storage means 403 in advance, and calculates the predicted travel time by comparing the past travel time information with the current travel time information. The traffic information distribution means 404 distributes the predicted travel time to the traffic information display device. For example, when the predicted travel time is distributed to the traffic information display device 101 shown in FIGS. 1 and 2, the traffic information accuracy determination means 105 determines the accuracy by comparing the travel history information with the predicted travel time. Since the predicted travel time reflects the future traffic situation with respect to the delivery time, it is possible to reduce the error from the actual traffic situation, thereby further reducing the update frequency of the traffic information display device. It becomes possible.
[0029]
As described above, by providing the traffic information service center with the traffic information prediction means, the accuracy of the distributed traffic information is improved, and the frequency of updating the traffic information display device can be reduced.
[0030]
Next, an embodiment of a traffic information display device utilizing the travel history information and a traffic information service will be described. In the above-described example of the traffic information display device (FIGS. 1 and 2), the travel history information based on the position and time detected by the position detection device is used by the traffic information accuracy determination device inside the display device. Was. In the embodiment described below, an example will be described in which this travel history information is transmitted to a traffic information service center and used as traffic information service for probe car information.
[0031]
FIG. 5 is an example of a processing flow of the traffic information display device utilizing the traveling history information. The system configuration for realizing the processing flow of FIG. 5 is the same as that of FIG. Hereinafter, the flow of FIG. 5 will be described.
[0032]
S501, S502, S503: Same as S201, S202, S203, respectively.
[0033]
S504: The traffic information display device requests traffic information from the traffic information service center and transmits the traveling history information to the traffic information service center. The transmission format of the traveling history information is expressed as information on a link represented by a measurement start time, an elapsed time, a traveling distance, and a passing link column number as shown in FIG. 13 or shown in FIG. In this manner, point sequence information expressed as an array of vehicle ID, information ID (information sequence number), time, and position is used.
[0034]
S505: The traffic information service center edits the traffic information in consideration of the travel history information transmitted together with the traffic information request. The travel history information can be edited as traffic information by using it as probe car information.
[0035]
S506: The traffic information display device displays the new traffic information received from the traffic information service center. The new traffic information is again stored in the storage unit as the past traffic information, and the processing after S502 is repeated.
[0036]
By the above processing, it is possible to transmit the travel history information to the traffic information service center and utilize it as traffic information service as probe car information. Since the traveling history information transmitted from the vehicle to the traffic information service center reflects the actual traffic situation, the traffic information service center has an advantage that it can provide more accurate traffic information. Further, the traffic information display device has an advantage that the accuracy of the provided traffic information is improved due to the presence of other vehicles that transmit the travel history information.
[0037]
As described above, if the number of vehicles that transmit travel history information to the traffic information service center = probe cars increases, the traffic information service center can improve the accuracy of the provided traffic information and can improve the quality as a service. However, the probe car itself rarely directly enjoys the merit of transmitting the travel history information by itself. Therefore, it is conceivable that a traffic information service center that benefits from an increase in the number of probe cars will provide a unique service for the probe cars to increase the number of probe cars. Specifically, it is conceivable to provide different services for a probe car that has transmitted travel history information and a vehicle that does not transmit travel history information (= non-probe car). Hereinafter, an example in which a probe car and a non-probe car provide different services will be described with reference to FIG.
[0038]
It is conceivable to give some privilege to the probe car. For the probe car member who has transmitted the travel history information, a “shop coupon” or “point for the travel history information” is calculated as a consideration and a fee such as a service usage discount is returned. Alternatively, it is conceivable that other services associated with the traffic information service center are distributed only to the probe car.
[0039]
By using a probe car, it is also possible to collect traffic information on roads where sensors are not installed on the road, so that only the traffic information display device of the probe car can provide traffic information on the area collected by the probe car member vehicles. Conceivable. With respect to an area where traffic information can be provided, a difference is made between a probe car and a non-probe car.
[0040]
When a probe car is used, detailed traffic information can be collected by observing a change in the speed of the vehicle. Therefore, only the traffic information display device of the probe car provides the detailed traffic information collected by the probe car member vehicles. It is possible. A difference is made between a probe car and a non-probe car with respect to the level of detail at which traffic information can be provided.
[0041]
A specific example is as shown in FIG. For example, in a case where a plurality of cameras are installed on one road link and the travel time is measured by recognizing the car number, it is considered that these cameras are used as sensors for observing traffic conditions to measure the degree of congestion of the road link. The average moving speed is obtained by dividing the distance between the cameras by the measured travel time. If the average moving speed is equal to or less than a certain threshold (for example, 10 km / h or less), the link is determined to be congested. On the other hand, when a probe car is used, the moving speed inside the link can be observed, so that the degree of congestion can be measured for each partial section inside the link. By limiting the use of traffic information collected by this probe car to probe car members, service differentiation will be achieved.
[0042]
Differentiating the service between the probe car and the non-probe car as in the above example contributes to the spread of the probe car, and the traffic information service can provide higher quality traffic information.
[0043]
Next, an embodiment of a traffic information service center that manages distribution traffic information will be described.
[0044]
FIG. 6 is an example of a traffic information service center that manages traffic information distributed to a traffic information display device and determines the accuracy of the traffic information on the service center side. The traffic information service center 601 (401) is connected to the traffic information display device via the communication network 107 and also connected to the traffic information collection source with the communication network 405 as in the example of FIG. Gather information. The traffic information service center 601 includes a distribution traffic information management unit 602, a traffic information storage unit 603, and a traffic information accuracy determination unit 604. The processing of each means will be described using the flow of FIG.
[0045]
S701: The distribution traffic information management means 602 distributes traffic information to the traffic information display device. As a method of distributing traffic information, push distribution is performed to a distribution destination traffic information display device, or distribution traffic information is held on a node of the communication network 107 (including a traffic information service center) as traffic information to be acquired. Make the display device obtainable.
[0046]
S702: The distribution traffic information management unit 602 stores the distributed traffic information along with the ID of the distribution destination traffic information display device, the traffic information providing area included in the distribution traffic information, and the version of the distribution traffic information, and stores the distributed traffic information in the traffic information storage unit 603. To memorize. Through this processing, the traffic information service center can recognize what kind of traffic information the traffic information display device of the distribution destination currently holds or is to be acquired.
[0047]
S703: The traffic information service center collects real-time traffic information from the traffic information collection source at regular intervals.
[0048]
S704: The traffic information accuracy determination unit 604 compares the distribution traffic information stored in the storage unit 603 with the real-time traffic information acquired in S703, and determines whether the difference is large as described above. When the difference is large, it is determined that the real-time traffic information is diverged from the delivered traffic information, that is, the accuracy of the delivered traffic information is reduced, and the process proceeds to S705. The format of the distribution traffic information and the format of the real-time traffic information are both shown in FIG. 12, and the respective items such as travel time, congestion degree, event and regulation are compared for each link. An evaluation value is calculated by, for example, weighting and averaging the differences, and when the evaluation value exceeds a predetermined value, it is determined that the change in traffic information has increased, and the accuracy of the delivered traffic information has decreased. It is determined that there is. If the difference between the real-time traffic information and the distribution traffic information is small, the process returns to S703 and repeats the process of S704.
[0049]
S705: The distribution traffic information management means 602 distributes the traffic information acquired in real time to the traffic information display device as new traffic information. The distributed traffic information is stored again in the storage unit 603, and the processes in and after S702 are repeated.
[0050]
As described above, by providing the traffic information service with the distribution traffic information management unit and the traffic information accuracy determination unit, it is possible to reduce the distribution frequency while maintaining the accuracy of the traffic information to be distributed.
[0051]
Next, an embodiment of the vehicle operation management service in cooperation with the traffic information providing service will be described with reference to FIG.
[0052]
Reference numeral 801 denotes an operation management center, 805 denotes an office terminal of the operation manager, 806 denotes a vehicle managed by the operation manager, 807 denotes an office terminal 805, a communication network connected to the operation management center 801, a traffic information service center, and 808 denotes a management network. This is a communication network that links the vehicle with the operation management center 801. The operation management center 801 includes not only an operation management unit 802 for operation management but also a traffic information storage unit 803 and a traffic information accuracy determination unit 804.
[0053]
The operation management means 802 manages the dynamics of the management vehicle 806 such as the position and the state. The management vehicle 806 includes a GPS and a packet communication terminal, and uplinks the position of the own vehicle to the operation management center 801 using the communication network 808, and the operation management unit 802 manages the position information of the vehicle.
[0054]
On the other hand, the office terminal 805 accesses the operation management center 801 via the communication network 807 and acquires vehicle position information from the operation management means 802. Thereby, the office terminal 805 can grasp the position of the management vehicle 806. In addition, the operation management center obtains real-time traffic information by connecting to the traffic information service center via the communication network 807, and provides a service of providing the traffic information to the office terminal 805. At this time, in the traffic information providing service, the operation management center is provided with the traffic information storage unit 803 and the traffic information accuracy determination unit 804, so that the traffic information generated around the vehicle required by the office terminal 805 can be used to reduce the communication frequency. It is possible to provide a reduced amount. Hereinafter, the processing flow will be described with reference to FIG.
[0055]
S901: The management vehicle 806 transmits the vehicle position to the operation management center 801.
[0056]
S902: The operation management center 801 acquires the vehicle position.
[0057]
S903, S904: The operation management center 801 requests real-time traffic information around the vehicle position from the traffic information service center. That is, the vehicle information and the real-time traffic information request around the vehicle position are transmitted to the traffic information service center. The traffic information service center filters by vehicle position and distributes traffic information around the vehicle position to the operation management center. It is assumed that the format to be distributed is as shown in FIG.
[0058]
S905: It is assumed that the operation management center 801 previously stores the traffic information previously distributed to the office terminal 805 in the traffic information storage unit 803. The traffic information accuracy determination unit 804 compares the previously delivered traffic information with the traffic information newly acquired in S903, and determines whether the difference is large. When the difference is large, the real-time traffic information deviates from the distributed traffic information. That is, it is determined that the accuracy of the delivered traffic information has decreased, and the process proceeds to S906.
[0059]
The criterion for determining whether or not the deviation is large is, like S704 in FIG. 7, a weighted average of the difference between each traffic information provision item for each link to obtain an evaluation value. If the evaluation value exceeds a predetermined value, the traffic value is determined. It is determined that the change in the information has increased, and that the accuracy of the delivered traffic information has decreased. When the difference between the real-time traffic information and the distribution traffic information is small, the process proceeds to S903 again after waiting for a predetermined time (after about 5 minutes, which is the update cycle of the normal traffic information), and acquires the traffic information around the vehicle position. When the new vehicle position is acquired in S902 during the wait, the process of S902 is prioritized, and the thread on the wait side disappears.
[0060]
S906: The operation management center distributes the newly acquired traffic information to the office terminal 805.
[0061]
S907: The operation management center stores the traffic information distributed in S906 in the traffic information storage unit 803 together with the vehicle ID.
[0062]
S908, 909: The office terminal 805 acquires and displays traffic information.
[0063]
The screen at the office terminal transitions as shown in FIG. 10 and displays traffic information. 1006 indicates road congestion. On the screen 1001, a management vehicle position 1005 is displayed on the map display 1004. The traffic information represents the congestion display 1006. It is assumed that the traffic information display at this time displays the data shown in FIG.
[0064]
Next, in the phase of acquiring traffic information in S908, the screen transitions to 1002. The screen is displayed as 1007 to indicate that a state in which traffic information needs to be updated has occurred. This screen state occurs when a deviation between the distribution traffic information and the newly acquired traffic information shown in S905 occurs in the operation management center (when it is determined that the deviation is large). Assuming that the past distribution information to the office terminal is the content shown in FIG. 12 and the newly distributed information is the information shown in FIG. 14, in FIG. 12 and FIG. to differ greatly. From the viewpoint of the office terminal, the difference is automatically determined by the operation management center, so that it seems that the traffic information that is highly necessary at the time of the change has been selected and distributed.
[0065]
When the download of the traffic information is completed, the screen changes to 1003. Since the accident location is displayed as an icon 1008, the office terminal can grasp the positional relationship between the surrounding vehicles, their IDs, and the accident location.
[0066]
By performing the above system configuration and processing, the service provider who enjoys the traffic information service in cooperation with the vehicle operation service can immediately know the sudden event that has occurred around the vehicle and instruct the vehicle on the detour route. By doing so, time loss due to arrival delay can be reduced.
[0067]
【The invention's effect】
The frequency of updating traffic information can be reduced. In addition, the accuracy of the traffic information to be provided can be secured to a certain level or more.
[Brief description of the drawings]
FIG. 1 is a system configuration of a traffic information display device.
FIG. 2 is a processing flow of the traffic information display device.
FIG. 3 is a screen transition example of the traffic information display device.
FIG. 4 is a system configuration of a traffic information service center.
FIG. 5 is a processing flow of a traffic information display device using travel history information.
FIG. 6 is a system configuration of a traffic information service center including distribution traffic information management means.
FIG. 7 is a processing flow of a traffic information service center that manages distribution traffic information.
FIG. 8 is a system configuration of a vehicle operation management service in cooperation with a traffic information providing service.
FIG. 9 is a processing flow of a vehicle operation management service in cooperation with a traffic information providing service.
FIG. 10 is a screen display example at an office terminal.
FIG. 11 is a comparison between past traffic information and travel history information.
FIG. 12 is an example of a traffic information format.
FIG. 13 shows an example of travel history information.
FIG. 14 is a comparison between new traffic information and travel history information.
FIG. 15 shows an example of a traffic information format (new).
FIG. 16 is an example of differentiating a service for a probe from a service for a non-probe.
[Explanation of symbols]
101: traffic information display device, 102: display, 107, 405, 807, 808: communication network, 301, 302, 303, 310: traffic information display screen, 308, 1006: congestion / congestion display, 401, 601 ... Traffic information service center, 801: operation management center, 805: office terminal, 806: managed vehicle, 1001, 1002, 1003: screen of office terminal, 1005: managed vehicle position display, 1008: accident point display icon, 1101 ... Planned reach distance based on past traffic information, 1102... Vehicle running history.

Claims (11)

A traffic information display device having a display for displaying traffic information together with a map,
Two-way communication means connected by communication with a traffic information service center;
Readable and writable storage means for storing traffic information obtained by communication from the traffic information service center,
The storage means compares the expected reach distance information predicted based on the traffic information acquired and stored in the past with the actual vehicle travel history information, and determines whether or not the difference between these information is large. Accuracy determination means,
When the deviation is determined to be large, the traffic information service center is requested to acquire traffic information, and a message indicating that the traffic information is being downloaded is displayed on the display. Display device. In claim 1,
When requesting the traffic information service center to obtain traffic information, a traffic information display device displays a message on the display so that the user can confirm whether or not to obtain the traffic information. In claim 1,
A traffic information display device, which updates currently displayed traffic information and superimposes the downloaded traffic information on the map. In a traffic information display device for displaying traffic information,
Two-way communication means connected by communication with a traffic information service center;
Readable and writable storage means for storing traffic information;
A traffic information display device comprising: traffic information accuracy determination means for comparing current traffic information stored in the storage means with traffic information obtained in the past and requesting a traffic information service center to obtain new traffic information. In claim 4,
The traffic information display device is installed in a vehicle equipped with a GPS function,
The traffic information display device is characterized in that the traffic information is travel history information based on a position of the vehicle detected by the GPS and a time at the position. In claim 4,
The traffic information service center includes traffic information prediction means for creating predicted traffic information,
The traffic information display device receives distribution of predicted traffic information from the traffic information service center. In claim 5,
A traffic information display device for transmitting the travel history information to the traffic information service center. In claim 7,
The traffic information display device receives one or more of a service point, wide area traffic information, and detailed traffic information from the traffic information service center according to the travel history information transmitted to the traffic information service center. Traffic information display device. A method of operating an operation management center, comprising: an operation management unit, a traffic information storage unit, and a traffic information accuracy determination unit, wherein the office obtains vehicle position information of a vehicle managed by the office and traffic information around the vehicle. At
The operation management means manages the position of the vehicle uplinked from the plurality of vehicles managed by the office to the operation management center,
The traffic information storage means collects real-time traffic information around the vehicle,
The operation management center causes the office terminal to acquire the location of the vehicle and traffic information generated around the vehicle in response to access from the office terminal to the operation management center, and stores the traffic information in the traffic information storage unit. ,
The traffic information accuracy determination unit determines whether the difference between the stored traffic information and newly collected traffic information around the vehicle is large,
When the deviation is determined to be large by the traffic information accuracy determination means, the traffic information newly generated around the new vehicle position and the vehicle is acquired by the office terminal. Operation method. In claim 9,
When the deviation is determined to be large in the traffic information accuracy determination means, while the office terminal acquires the traffic information newly generated at the position of the new vehicle and around the vehicle, the new information is acquired. A method for operating an operation management center, characterized by displaying a message indicating that the operation is being performed. In claim 9,
Stored in the traffic information storage means are a position of the vehicle, traffic information generated around the vehicle, and a vehicle ID of the vehicle.
The operation method of an operation management center, wherein the office terminal displays the newly generated traffic information together with the vehicle ID.

Images