JP2008134093A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device, a navigation method and a navigation program showing a reachable range capable of determining the degree of congestion intuitively. <P>SOLUTION: This navigation device for displaying a reachable range reachable within a prescribed time from an optional spot in the superimposed state on a map is equipped with a congestion information acquisition part for acquiring congestion information; the first reachable range calculation part for calculating the first reachable range reachable within a prescribed time from one optional spot, to which the congestion information is not added; the second reachable range calculation part for calculating the second reachable range reachable within the prescribed time from one optional spot, to which the congestion information is added; and a display control part for displaying difference information between the first reachable range calculated by the first reachable range calculation part and the second reachable range calculated by the second reachable range calculation part, in the superimposed state on the map. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a navigation device, a navigation method, and a navigation program, and more specifically, a navigation device, a navigation method, and navigation that display a reachable range that can be reached within a predetermined time from a current location or a specified point. Regarding the program.

Conventionally, a technique has been proposed in which a reachable range that can be reached within a predetermined time from a current location is indicated on a map with a closed curve (see, for example, Patent Document 1).
JP 2004-156882 A

  However, in the conventional technology, even if the reachable range including the traffic situation that can be reached within a predetermined time from the current location can be shown to the user, the degree of congestion is actually less than when there is no traffic jam. It was not possible to show the user intuitively. Therefore, for example, even if there is a traffic jam, an index that allows the user to intuitively determine that he / she wants to depart at this level of congestion or intuitively determines that the user will not depart at this level of congestion There was no.

  Therefore, the present invention has been made in view of the above problems. That is, an object is to provide a navigation device, a navigation method, and a navigation program that indicate a reachable range in which the degree of congestion can be intuitively determined.

  The first aspect of the present invention is directed to a navigation device that displays a reachable range that can be reached within a predetermined time from an arbitrary point on a map. The present invention includes a traffic jam information acquisition unit that acquires traffic jam information, a first reachable range calculation unit that calculates a first reachable range that does not consider traffic jam information that can be reached within a predetermined time from an arbitrary point, and A second reachable range calculation unit that calculates a second reachable range that takes into account traffic jam information that can be reached from an arbitrary point within a predetermined time, and a first reachable range calculation unit that calculates the first reachable range A display control unit that superimposes and displays difference information between the second reachable range and the second reachable range calculated by the second reachable range calculation unit on the map.

  The display control unit preferably fills and displays the difference area between the first reachable range and the second reachable range on the map as difference information.

  Moreover, it is preferable that a display control part superimposes and displays the information which shows the area data of the difference area | region of a 1st reachable range and a 2nd reachable range as difference information on a map.

  The display control unit accumulates the area data of the difference area between the first reachable range and the second reachable range as the difference information, and the accumulated area data of the past difference area and the current difference area It is preferable to superimpose and display information indicating the area data of the difference area on the map so that the area data can be compared.

  The second aspect of the present invention is directed to a navigation apparatus that displays a reachable range that can be reached within a predetermined time from an arbitrary point on a map. The present invention shows a reachable range calculating unit that calculates a closed curve indicating a reachable range that can be reached within a predetermined time from an arbitrary point, and an average reachable range that can be reached within an average time from an arbitrary point An average reachable range calculation unit for calculating a closed curve, and a closed curve indicating the reachable range calculated by the reachable range calculation unit, and any one point from the closed curve indicating the average reachable range calculated by the average reachable range calculation unit And a display control unit that superimposes and displays on the map by changing the thickness of the line inside, the color of the line, and / or the type of the line.

  The third aspect of the present invention is directed to a navigation device that displays a reachable range that can be reached within a predetermined time from an arbitrary point on a map. The present invention relates to a traffic jam information acquisition unit that acquires traffic jam information, a reachable range calculation unit that calculates two or more reachable ranges that can be reached within a predetermined time from an arbitrary point, and a reachable range When the determination unit determines whether the line interval of the closed curve indicating two or more reachable ranges calculated by the calculation unit is smaller than the predetermined interval, and when the determination unit determines that the line interval is smaller than the predetermined interval The map shows a traffic jam cause investigation unit that investigates the cause of the traffic jam based on the traffic jam information acquired by the traffic jam information acquisition unit, and an image showing the cause of the traffic jam investigated by the traffic jam cause survey unit And a display control unit that superimposes and displays in a portion determined to be narrow above.

  Moreover, it is preferable that one arbitrary point is a current location or a point designated by the user.

  The fourth aspect of the present invention is directed to a navigation method in which a reachable range that can be reached within a predetermined time from an arbitrary point is superimposed and displayed on a map. The present invention includes a traffic jam information acquisition step for acquiring traffic jam information, a first reachable range calculation step for calculating a first reachable range that does not consider traffic jam information that can be reached within a predetermined time from an arbitrary point, and The second reachable range calculation step for calculating the second reachable range in consideration of traffic jam information that can be reached within a predetermined time from an arbitrary point, and the first reachable range calculation step calculated by the first reachable range calculation step A display control step of superimposing and displaying difference information between the second reachable range and the second reachable range calculated in the second reachable range calculation step on the map.

  The fifth aspect of the present invention is directed to a navigation program executed by a computer of a navigation device that displays a reachable range that can be reached within a predetermined time from an arbitrary point on a map. The present invention provides a computer with a traffic information acquisition step for acquiring traffic jam information, and a first reachable range for calculating a first reachable range that does not take into account traffic jam information that can be reached within a predetermined time from an arbitrary point. Calculated by a calculation step, a second reachable range calculation step for calculating a second reachable range that takes into account traffic jam information that can be reached within a predetermined time from an arbitrary point, and a first reachable range calculation step The display control step of superimposing and displaying on the map the difference information between the first reachable range and the second reachable range calculated in the second reachable range calculation step is executed.

  As described above, according to each aspect of the present invention, it is possible to provide a navigation device, a navigation method, and a navigation program that indicate a reachable range in which the degree of congestion can be intuitively determined.

(Embodiment 1)
A navigation device 1 according to Embodiment 1 of the present invention will be described in detail with reference to the drawings. In the present embodiment, an example in which the navigation device 1 is installed in an automobile will be described.

  FIG. 1 is a block diagram showing an overall configuration of a navigation apparatus 1 according to Embodiment 1 of the present invention. In FIG. 1, the navigation device 1 includes a map information storage unit 12, a positioning unit 13, an input unit 14, an output unit 15, a traffic jam information acquisition unit 16, and a working area unit 17. The output unit 15 includes a display device 151.

  The control unit 11 includes a route search unit 111, a first reachable range calculation unit 112, a second reachable range calculation unit 113, and a display control unit 114. In the drawings, components not related to the present invention are omitted.

  The control unit 11 includes a CPU, an MPU, a ROM (Read Only Memory), and a RAM (Random Access Memory) that control the operation of the entire navigation apparatus 1. Further, the control unit 11 may proceed with processing while reading and writing information necessary for processing in a memory as the working area unit 17, typically a RAM. A detailed operation representing the processing content will be described later.

  The map information storage unit 12 is, for example, an HDD, a DVD, or a flash memory in which map information such as road and intersection data is stored. The information stored in the map information storage unit 12 may be downloaded as appropriate from a center facility (for example, a server device) via a communication unit (not shown).

  As shown in FIG. 2, road and intersection data are stored in the map information storage unit 12 as a node data table (A), a link data table (B), and a road type data table (C). The nodes stored in the node data table (A) are points where roads branch in several directions, such as intersections and junctions. Position information such as latitude and longitude is connected to each node, and will be described later. It consists of the number of links, link IDs, etc. The link stored in the link data table (B) represents a road connecting the nodes, the ID of the start node, the ID of the end node, and the link cost (units are meters, kilometers or seconds). Etc.), the width of the link (the unit is the road width in meters, etc.), the road type, etc. Here, the link cost is used as a cost value when the route search unit 111 described later performs a route search. In this embodiment, it is assumed that the link cost is the link transit time. The value of the road type, which is one of the attributes of the link data table (B), can be identified by the road type data table (C), and does not overlap each road type such as an expressway or a general road. have.

  Not only road information that can restore such a road network, but also background data (rivers, green spaces, etc.), facility information (for example, information for managing the location of family restaurants and gas stations), name information, etc. are also map information. It is included in the storage unit 12.

  The positioning unit 13 is installed in a vehicle in which the navigation apparatus 1 is installed, and for example, a GNSS (Global Navigation Satellite System) receiver, a vehicle speed sensor, a gyro (angular velocity) for positioning the current position, speed, direction, and current time. ) Sensor and / or acceleration sensor. The GNSS receiver is, for example, a GPS receiver or a Galileo receiver, which receives radio waves from a plurality of satellites and demodulates them to measure the absolute position of the receiver. In particular, in GPS, either single positioning or relative positioning (a method using a carrier phase integrated value or a differential method) may be used. Note that the GNSS receiver and various sensors are used alone or in combination for positioning of the current position, speed, and / or direction.

  The input unit 14 includes a push-type switch, a touch panel, a remote controller, a microphone that recognizes a user's voice and converts it into input information to the navigation device, or a voice recognition engine for inputting an instruction from the user. The

  The display device 151 is, for example, a liquid crystal display, a plasma display, or an organic EL display that displays an image according to display image data created by the control unit 11.

  The traffic jam information acquisition unit 16 can use various types of traffic jam information according to the type of traffic jam information to be provided (VICS information, probe information, etc.), and includes FM broadcast waves, optical / radio wave beacons, DSRC (Dedicated Short Range Communication); (Bandwidth communication) A receiving device corresponding to a receiver, a mobile phone, or the like is used. For example, in the case of a mobile phone, it is possible to use highly accurate traffic jam information (for example, probe information) distributed after processing data such as position and time collected through other vehicles. Further, the present invention is not limited to this, and the map information storage unit 12 is provided with a predicted traffic jam database in which past traffic statistics data (data representing road congestion according to past time zones, days of the week, dates, etc.) is stored. You may acquire traffic information. The traffic jam information is obtained as an alternative to the link cost (link passage time) in the link data table (B) described above. The traffic jam information can also be obtained as average speed data. In this case, the link length may be divided by the average speed data. By using this traffic jam information, it is possible to determine the required time with high accuracy in consideration of the degree of congestion.

  Next, components of the control unit 11 will be described. The route search unit 111 has a function of searching for the shortest time route from the current location or an arbitrary point designated by the user. The shortest time path is calculated by expanding the road network including the nodes and links described above radially from the search start reference point.

  FIG. 3 is a schematic diagram showing a state in which road information stored in the map information storage unit 12 is restored as a road network composed of nodes and links. By using the road network restored in this way, the shortest time path and required time to an arbitrary point are calculated by following the nodes and links in order. The required time can be calculated by cumulatively adding the link cost (link passage time). Now, when the departure point is point A, there are a plurality of ways to get to point B. For example, when the route 1 and the route 2 are found in order, the accumulated time cost of the route 1 is 23, and the accumulated time cost of the route 2 is 14. At this time, the route 2 having a small cost value is adopted. Of course, when a route with a smaller accumulated time cost is found, the search is expanded while adopting the newly found route. Of course, the search does not extend in the direction of running backwards in one way.

  As such a search method, a route search method represented by a known Dijkstra method is used. Note that the link cost acquired by the traffic jam information acquisition unit 16 is used when the traffic jam is taken into account, and the link cost of the link data table (B) is used when the traffic jam is not taken into account. In addition, when considering traffic jams, traffic jam information cannot always be acquired for all links. At this time, the link cost of the link data table (B) is used. It should be noted that the determination of whether or not to consider the traffic jam is made by the first reachable range calculation unit 112 and the second reachable range calculation unit 113.

  The first reachable range calculation unit 112 has a function of calculating the first reachable range with a closed curve based on the shortest time route calculated by the route search unit 111 and the required time. The route search unit 111 is instructed to search for a route that does not consider traffic jams. For the calculation of the reachable range, for example, methods described in Japanese Patent Application Laid-Open No. 11-16094 and Japanese Patent Application No. 2006-157770 can be used. In the case of using Japanese Patent Laid-Open No. 11-16094, the map is divided into N with the starting point as the center, and the farthest point that can be reached in a predetermined time is obtained as a representative point for each of the divided areas. It is calculated by making one turn around and connecting. However, the present invention is not limited to these methods, and any method may be used as long as it is a method for obtaining a closed curve so as to efficiently include a reachable node group.

  The second reachable range calculation unit 113 has a function of calculating the second reachable range with a closed curve based on the shortest time route calculated by the route search unit 111 and the required time. The route search unit 111 is instructed to search for a route that takes traffic into consideration. Since the reachable range calculation method is the same as that of the first reachable range calculation unit 112, the description thereof is omitted.

  The display control unit 114 has a function of displaying the first reachable range and the second reachable range together with the map on the display. Also, the past results of the first reachable range and the second reachable range and the results of the current first reachable range and the second reachable range are processed, and the processed data is displayed on the display. You can also The results of the first reachable range and the second reachable range are logged together with the current location time and position information and accumulated in an HDD (not shown).

  FIG. 4 is a schematic view illustrating a screen displayed on the display device 151 by the display control unit 115. In FIG. 4, the own vehicle position mark 20 indicates the position of the own vehicle, the time adjustment button 22 is a button for designating 10 minutes later, and the time adjustment button 23 is a button for designating 10 minutes before, reaching The possible range 24 is a second reachable range in consideration of traffic jams, and the reachable range 25 is a first reachable range in which traffic jams are not considered. It is assumed that a map is displayed as the background.

  The first reachable range 25 and the second reachable range 24 represent a reachable range after 10 minutes from the vehicle position, and information on how many minutes later is clearly shown on the upper left of the screen. . In addition, when the user presses the time adjustment button 22, the first reachable range and the second reachable range for the time added by 10 minutes are displayed. Similarly, when the user presses the time adjustment button 23, the first reachable range and the second reachable range at the time obtained by subtracting 10 minutes are displayed. In addition, when it cannot be displayed such as after 0 minute, a message indicating that it cannot be displayed is notified. Although the time increase / decrease width of the time adjustment button is 10 minutes, it is not limited to this, and an arbitrary time width can be used. Further, the time increase / decrease adjustment is not limited to buttons, and input means such as a slider bar may be used. In addition, it is preferable that the scale is automatically widened in order to prevent the first and second reachable ranges from protruding from the screen size of the display device 151 by pressing the time adjustment button. Similarly, when the first and second reachable ranges are too small with respect to the screen size of the display device 151, it is preferable that the scale is automatically made detailed.

  In this way, the user can read information on how much the reachable range is different when there is a traffic jam compared to when there is no traffic jam, and intuitively grasp the degree of the traffic jam Can do. In particular, the greater the degree of congestion deterioration, the greater the difference between the first reachable range and the second reachable range. When the difference is large, it is possible to make a decision in advance such as stopping driving and taking a break. It is very convenient. The display shown in FIG. 4 may be always displayed when a map is displayed, or may be displayed by transitioning from a separately provided menu screen (not shown).

  The display control unit 115 can also display as shown in FIG. In FIG. 5, the own vehicle position mark 30 indicates the position of the own vehicle, the time adjustment button 32 is a button for designating 10 minutes later, and the time adjustment button 33 is a button for designating 10 minutes before, and hatched lines A region 34 marked with is a difference region between the first reachable range and the second reachable range. Note that a map is displayed as the background. As shown in FIG. 5, the difference area 34 between the first reachable range and the second reachable range is displayed as a solid band.

  In this way, the user can more clearly grasp the information about the maximum reachable area when there is no traffic jam and the minimum reachable area when there is a traffic jam. Note that the transparency of the difference area 34 between the first reachable range and the second reachable range can be changed.

  Hereinafter, the operation of the control unit 11 will be described in detail. FIG. 6 is an operation flowchart showing a series of flows for displaying how the degree of congestion changes in the future on the display device 151.

  In FIG. 6, the traffic jam information acquisition unit 16 first acquires traffic jam information (step S11). Next, the 1st reachable range calculation part 112 calculates the 1st reachable range which does not consider traffic jam information (step S12). Next, the second reachable range calculation unit 113 calculates a second reachable range that takes traffic information into consideration (step S13). Next, the display control unit 114 superimposes and displays the first reachable range and the second reachable range on the map (step S14). Note that the display control unit 114 can process the calculation results of the first reachable range and the second reachable range and display the processed data on the display device 151.

  FIG. 7 is a schematic view illustrating a screen displayed on the display device 151 by the display control unit 115. In FIG. 7, the own vehicle position mark 40 indicates the position of the own vehicle, the time adjustment button 43 is a button for designating 10 minutes later, and the time adjustment button 44 is a button for designating 10 minutes before, and is displayed. The window 41 is a congestion degree display window that indicates the degree of congestion. Note that a map is displayed as the background.

  In the congestion degree display window 41, today's congestion degree is displayed in a bar graph format as compared with the previous day. Here, the bar length of the bar graph is determined by the area data of the difference area 33 between the first reachable range and the second reachable range shown in FIG. The display control unit 115 sequentially accumulates the area data of the difference area 33. The length of the bar of the previous day's bar graph is set to 100 by normalizing the area data of the previous day. For this reason, it is always displayed with a fixed length. Also, the bar length of today's bar graph is normalized and displayed according to the area ratio of the previous day and today. That is, the bar length of today's bar graph is variable. Note that today and the previous day are not compared, and the average value of today and the past several days may be compared.

  In this way, since it is possible to grasp how crowded today is compared to usual, it is convenient. The user can grasp the degree of congestion in a desired arrival time zone by pressing the time adjustment button 41 or the time adjustment button 42.

(Embodiment 2)
A navigation device 2 according to Embodiment 2 of the present invention will be described in detail with reference to the drawings. In the present embodiment, an example in which the navigation device 2 is installed in an automobile will be described.

  FIG. 8 is a block diagram showing the overall configuration of the navigation device 2 according to Embodiment 2 of the present invention. In FIG. 8, the navigation device 2 includes a map information storage unit 12, a positioning unit 13, an input unit 14, an output unit 15, a traffic jam information acquisition unit 16, and a working area unit 17. The control unit 201 includes a route search unit 111, a reachable range calculation unit 211, a display mode change unit 212, a congestion cause investigation unit 213, and a display control unit 214. The output unit 151 includes a display device 151. In the drawings, components not related to the present invention are omitted. In addition, components other than the reachable range calculating unit 211, the display mode changing unit 212, the congestion cause investigating unit 213, and the display control unit 214 are the same as those in the first embodiment, and are denoted by the same reference numerals and description thereof is omitted. To do.

  The components of the control unit 201 will be described. The reachable range calculation unit 211 has a function of calculating the first reachable range with a closed curve based on the shortest time route calculated by the route search unit 111 and the required time. The route search unit 111 is instructed to search for a route that takes traffic jams into account or does not take traffic jams into account. For the calculation of the reachable range, for example, methods described in Japanese Patent Application Laid-Open No. 11-16094 and Japanese Patent Application No. 2006-157770 can be used. In the case of using Japanese Patent Laid-Open No. 11-16094, the map is divided into N with the starting point as the center, and the farthest point that can be reached in a predetermined time is obtained as a representative point for each of the divided areas. It is calculated by making one turn around and connecting. Note that the present invention is not limited to these methods, and any method may be used as long as a closed curve is obtained so as to efficiently include a reachable node group.

  The display mode changing unit 212 has a function of changing the display mode of the reachable range. Detailed operation will be described later. The traffic jam cause investigation unit 214 has a function of investigating a traffic jam cause at a traffic jam occurrence location on the map. The traffic jam cause is acquired by inquiring about the traffic jam cause if the traffic jam information acquisition unit 16 has acquired information on the traffic jam cause.

  The display control unit 214 has a function of superimposing and displaying the reachable range changed by the display mode changing unit 212 on a map, and a function of displaying an icon indicating the cause of the traffic jam at the location investigated by the traffic jam cause survey unit 214. is doing.

  Next, the operation of the control unit 201 will be described. First, the display mode changing unit 212 will specifically explain how the display mode is changed and how the display control unit 214 displays the changed reachable range with reference to FIG.

  FIG. 9 is a schematic diagram showing a state in which the display mode of the reachable range is changed. In FIG. 9, the own vehicle position mark 50 indicates the position of the own vehicle, the reachable range 51 indicates a range that can be reached within a predetermined time from the own vehicle position, and the reachable average distance circle 52 is determined from the own vehicle position. A circle whose radius is the average value of the straight line distances to each point in the reachable range 51.

  That is, the area outside the reachable average distance circle 52 of the reachable range 51 is an area where the reachable distance is larger than the average (the influence of traffic congestion is small), and is inside the reachable average distance circle 52 of the reachable range 51. This area is an area where the reachable distance is smaller than the average (the influence of traffic congestion is large). At this time, as shown in FIG. 9, the display mode changing unit 212 increases the thickness of the line in the area inside the reachable average distance circle 52 of the reachable range 51. The thickness of the line is preferably not gradually changed but gradually changed.

  In this way, compared with simply displaying the reachable range as a closed curve, the change in the degree of congestion is more easily understandable and convenient for the user. For example, it is possible to intuitively grasp how much the direction that the user is going to go from now on is compared to other directions by the thickness of the line. The display mode changing unit 212 may change the color or the line type instead of the thickness of the line.

  Next, a state in which the traffic jam cause investigation unit 213 investigates a location where the traffic jam occurs and the display control unit 214 displays the traffic jam cause icon will be described with reference to FIG.

  FIG. 10 is a schematic diagram showing a state in which a plurality of reachable ranges are displayed and a congestion cause icon is displayed. In FIG. 10, the own vehicle position mark 60 indicates the position of the own vehicle, the reachable ranges 61 to 63 indicate ranges that can be reached within a predetermined time from the own vehicle position, and the congestion cause icon 64 indicates the cause of the congestion.

  As shown in FIG. 10, the traffic jam cause investigation unit 213 investigates the traffic jam cause where the line interval of the reachable range is narrow. If the traffic jam information obtaining unit 16 has acquired information on the traffic jam cause, the traffic jam cause investigating unit 213 inquires about this, and places an icon indicating the cause (for example, accident traffic jam) at the location. If the cause of the traffic jam is not known, nothing is placed.

  The control unit 201 determines that the reachable range is narrow if the line interval of the reachable range is equal to or smaller than a predetermined threshold provided for each scale. The determination of the line spacing is performed by dividing the map into N parts around the current location and determining the narrowness of the line spacing for each of the divided areas. The congestion cause icon is controlled to be displayed at a location where the distance between reachable ranges is narrow when a plurality of reachable ranges are displayed.

  As described above, the user can grasp the cause of the traffic jam at the portion where the line interval between the reachable ranges is narrow by referring to the traffic jam cause icon, which is convenient. This traffic jam cause icon can be selected, and when the user selects it, more detailed information (such as traffic jam length, traffic jam trend) may be displayed in a window.

  Instead of arranging the traffic jam cause icon, the display form of the reachable range itself may be changed according to the traffic jam cause. For example, an area where construction is congested is expressed in yellow.

  In the present invention, a software program for realizing the above-described embodiment (in the embodiment, a program corresponding to the flowchart shown in the figure) is supplied to the apparatus, and the computer of the apparatus reads the supplied program. And the case where it is achieved by executing. Therefore, in order to implement the functional processing of the present invention on a computer, the program itself installed in the computer also implements the present invention. That is, the present invention also includes a navigation program for realizing the functional processing of the present invention.

  As described above, according to the present invention, it is possible to provide a navigation device, a navigation method, and a navigation program that indicate a reachable range in which the degree of congestion can be intuitively determined.

  The configuration described in the above embodiment is merely a specific example and does not limit the technical scope of the present invention. Any configuration can be employed within the scope of the effects of the present application.

  The navigation device according to the present invention is useful as a dispatch / command system for personal computers, mobile phones, taxis, delivery vehicles, emergency / emergency vehicles, security vehicles, and the like.

The block diagram which shows the whole structure of the navigation apparatus 1 which concerns on Embodiment 1 of this invention. The figure which shows the table memorize | stored in the map information storage part 12 Diagram showing how the road network is restored Schematic diagram showing an example of a screen displayed on the display device 151 Schematic diagram showing an example of a screen displayed on the display device 151 Flow chart showing a series of flows for displaying how the degree of congestion changes in the future on the display device 151. Schematic diagram showing an example of a screen displayed on the display device 151 The block diagram which shows the whole structure of the navigation apparatus 2 which concerns on Embodiment 2 of this invention. Schematic diagram showing an example of how the display mode of the reachable range has changed Schematic diagram showing an example of how the congestion cause icon is displayed

Explanation of symbols

1 Navigation device (navigation device)
DESCRIPTION OF SYMBOLS 11, 201 Control part 12 Map information storage part 13 Positioning part 14 Input part 15 Output part 16 Congestion information acquisition part 17 Working area part 20, 30, 40, 50, 60 Own vehicle position mark 22, 32, 43 Time adjustment button ( +10 minutes)
23, 33, 44 Time adjustment buttons (-10 minutes)
24 Reachable range with consideration of traffic jam 25 Reachable range without consideration of traffic jam 34 Difference between reachable ranges 41 Congestion degree display window 51, 61, 62, 63 Reachable range 52 Reachable average distance circle 64 Congestion cause icon 111 Route Search unit 112 First reachable range calculation unit 113 Second reachable range calculation unit 114, 214 Display control unit 151 Display device 211 Reachable range calculation unit 212 Display mode change unit 213 Congestion cause investigation unit

Claims (9)

A navigation device that superimposes and displays a reachable range that can be reached within a predetermined time from an arbitrary point,
A traffic information acquisition unit for acquiring traffic information;
A first reachable range calculation unit that calculates a first reachable range that does not take into account the traffic jam information that can be reached within a predetermined time from an arbitrary point;
A second reachable range calculation unit for calculating a second reachable range in consideration of the traffic jam information that can be reached within a predetermined time from the arbitrary point;
Display that displays difference information between the first reachable range calculated by the first reachable range calculation unit and the second reachable range calculated by the second reachable range calculation unit on the map. A navigation device comprising a control unit.   The display control unit fills a difference area between the first reachable range and the second reachable range as the difference information and displays the difference information on the map in a superimposed manner. The navigation device described.   The display control unit superimposes and displays on the map information indicating area data of a difference area between the first reachable range and the second reachable range as the difference information. The navigation device according to claim 1.   The display control unit accumulates area data of the difference area between the first reachable range and the second reachable range as the difference information, and the accumulated area data of the past difference area and the current 4. The navigation apparatus according to claim 3, wherein information indicating the area data of the difference area is superimposed on the map so that the area data of the difference area can be compared. A navigation device that superimposes and displays a reachable range that can be reached within a predetermined time from an arbitrary point,
A reachable range calculation unit for calculating a closed curve indicating a reachable range that can be reached within a predetermined time from an arbitrary point;
An average reachable range calculating unit that calculates a closed curve indicating an average reachable range that can be reached within an average time from the one arbitrary point;
Of the closed curve indicating the reachable range calculated by the reachable range calculation unit, the line of the portion inside the one arbitrary point from the closed curve indicating the average reachable range calculated by the average reachable range calculation unit A display device comprising: a display control unit configured to superimpose and display on the map by changing a thickness, a line color, and / or a line type. A navigation device that superimposes and displays a reachable range that can be reached within a predetermined time from an arbitrary point,
A traffic information acquisition unit for acquiring traffic information;
A reachable range calculation unit that calculates a closed curve indicating two or more reachable ranges that can be reached within a predetermined time from an arbitrary point;
A determination unit that determines whether a line interval of a closed curve indicating two or more reachable ranges calculated by the reachable range calculation unit is narrower than a predetermined interval;
When the determination unit determines that the line interval is narrower than a predetermined interval, the traffic jam that investigates the cause of the traffic jam based on the traffic jam information acquired by the traffic jam information acquisition unit for the location determined to be narrow on the map The cause investigation department,
A navigation apparatus comprising: a display control unit that superimposes and displays an image representing a cause of traffic jam investigated by the traffic jam cause survey unit at a location determined to be narrow on the map.   The navigation device according to claim 1, wherein the arbitrary one point is a current location or a point designated by a user. A navigation method in which a reachable range that can be reached within a predetermined time from an arbitrary point is superimposed on a map,
A traffic information acquisition step for acquiring traffic information,
A first reachable range calculating step for calculating a first reachable range that does not take into account the traffic jam information that can be reached within a predetermined time from an arbitrary point;
A second reachable range calculating step for calculating a second reachable range in consideration of the traffic jam information that can be reached within a predetermined time from the one arbitrary point;
Display that displays the difference information between the first reachable range calculated in the first reachable range calculation step and the second reachable range calculated in the second reachable range calculation step on the map. A navigation method comprising a control step. A navigation program executed by a computer of a navigation device that displays a reachable range that can be reached within a predetermined time from an arbitrary point on a map,
In the computer,
A traffic information acquisition step for acquiring traffic information,
A first reachable range calculating step for calculating a first reachable range that does not take into account the traffic jam information that can be reached within a predetermined time from an arbitrary point;
A second reachable range calculating step for calculating a second reachable range in consideration of the traffic jam information that can be reached within a predetermined time from the one arbitrary point;
Display that displays the difference information between the first reachable range calculated in the first reachable range calculation step and the second reachable range calculated in the second reachable range calculation step on the map. A navigation program that executes control steps.

Images