JP5144961B2 - Navigation device - Google Patents

Description

  The present invention relates to a navigation device for a vehicle.

  2. Description of the Related Art Conventionally, there is known a navigation device that supports a vehicle driver so that a vehicle driver can determine whether or not to bypass a traffic jam section by displaying a map and showing a traffic jam situation on the map. For example, Patent Document 1 discloses a navigation device that displays in a form in which the degree of congestion gradually changes along a road at boundary portions where the degree of congestion is different.

JP 2004-233191 A

  In a conventional navigation device as disclosed in Patent Document 1, the traffic jam status cannot be displayed for a traffic jam section outside the map display range. Therefore, it is impossible to notify the user of the traffic jam situation to the destination for each traveling direction of the vehicle, and as a result, the user cannot appropriately determine whether or not to bypass the traffic jam section.

The navigation device according to claim 1 includes: destination setting means for setting a destination; intersection selection means for selecting an intersection; and the optimum direction to the destination for each traveling direction of the intersection selected by the intersection selection means. Obtained by the optimum route searching means for searching for each route, the congestion information obtaining means for obtaining the congestion information to the destination, and the congestion information obtaining means for each optimum route searched by the optimum route searching means. Based on the traffic jam information, the display form of the traffic congestion bar graph indicating the traffic congestion status of the optimal route is determined, and the traffic congestion status of each optimal route is displayed by displaying the traffic congestion bar graph for each of the optimal routes. Display control means, the display control means each road traveling in each traveling direction of the intersection selected by the intersection selection means Near, when displaying a congestion bar graph showing traffic conditions in the case of traveling each road each lateral position of the traffic jam the bar graph represents a plurality of times in the future, the congestion traffic conditions at each time It is represented by a vertical display of a bar graph .
The navigation device according to claim 2 is a destination setting means for setting a destination, an intersection selecting means for selecting an intersection, and an optimum distance to the destination for each advancing direction of the intersection selected by the intersection selecting means. Obtained by the optimum route searching means for searching for each route, the congestion information obtaining means for obtaining the congestion information to the destination, and the congestion information obtaining means for each optimum route searched by the optimum route searching means. Based on the traffic jam information, the display form of the traffic congestion bar graph indicating the traffic congestion status of the optimal route is determined, and the traffic congestion status of each optimal route is displayed by displaying the traffic congestion bar graph for each of the optimal routes. Display control means, the display control means each road traveling in each traveling direction of the intersection selected by the intersection selection means Near, upon congestion bar graph showing traffic conditions in the case of traveling the road to view each lateral position of the traffic jam the bar graph represents a plurality of times in the past, the congestion traffic conditions at each time It is represented by a vertical display of a bar graph .
The navigation device according to claim 3 is a destination setting means for setting a destination, an intersection selection means for selecting an intersection, and an optimum distance to the destination for each traveling direction of the intersection selected by the intersection selection means. Obtained by the optimum route searching means for searching for each route, the congestion information obtaining means for obtaining the congestion information to the destination, and the congestion information obtaining means for each optimum route searched by the optimum route searching means. Based on the traffic jam information, the display form of the traffic congestion bar graph indicating the traffic congestion status of the optimal route is determined, and the traffic congestion status of each optimal route is displayed by displaying the traffic congestion bar graph for each of the optimal routes. Display control means, the display control means each road traveling in each traveling direction of the intersection selected by the intersection selection means Near, upon congestion bar graph showing traffic conditions in the case of traveling the road to view each lateral position of the traffic jam the bar graph represents a plurality of times in the past and the future, the traffic conditions at each time It is represented by a vertical display of the traffic jam bar graph .

  ADVANTAGE OF THE INVENTION According to this invention, a user can be notified of the traffic congestion condition to the destination for every advancing direction of a vehicle.

-First embodiment-
An in-vehicle navigation device according to an embodiment of the present invention will be described. When the navigation apparatus approaches the guidance intersection while guiding the host vehicle to the destination according to the recommended route, it displays a traffic jam bar graph indicating the traffic jam status to the destination for each traveling direction. This makes it possible to inform the user of the traffic jam situation up to the destination for each traveling direction of the vehicle.

  The configuration of the navigation device of this embodiment is shown in the block diagram of FIG. The navigation device 1 includes a control unit 10, a vibration gyro 11, a vehicle speed sensor 12, a hard disk (HDD) 13, a GPS receiving unit 14, a VICS (Vehicle Information and Communication System) (registered trademark) information receiving unit 15, a display monitor 16, and a speaker. 17 and an input device 18.

  The control unit 10 includes a microprocessor, various peripheral circuits, a RAM, a ROM, and the like, and executes various processes based on a control program and map data recorded in the HDD 13. As described above, the processing performed by the control unit 10 displays a traffic congestion bar graph indicating the traffic congestion status up to the destination in each traveling direction when approaching the guidance intersection. The specific processing contents at this time will be described later in detail with reference to the flowchart of FIG.

  The vibration gyro 11 is a sensor for detecting the angular velocity of the host vehicle. The vehicle speed sensor 12 is a sensor for detecting the vehicle speed of the host vehicle. By detecting the movement state of the host vehicle at predetermined time intervals using these sensors, the position movement amount of the host vehicle is obtained, and thereby the current position of the host vehicle is detected.

  The HDD 13 is a non-volatile recording medium in which various data including map data are recorded. Data recorded in the HDD 13 is read out under the control of the control unit 10 as necessary, and is used for various processes and controls executed by the control unit 10.

  The map data recorded in the HDD 13 includes route calculation data, route guidance data, road data, and background data. The route calculation data is used for route search to the destination. The route guidance data is used to guide the host vehicle to a destination according to a set route, and represents an intersection name, a road name, and the like. The road data represents the shape and type of the road. The background data represents map shapes other than roads such as rivers and railways, positions of various facilities, and the like. Note that the minimum unit representing each road in the map data is called a link. That is, each road in the map data is composed of a plurality of links.

  The GPS receiver 14 receives a GPS signal transmitted from a GPS satellite and outputs it to the controller 10. The GPS signal includes the position and transmission time of the GPS satellite that transmitted the GPS signal as information for obtaining the position of the host vehicle and the current time. Therefore, by receiving GPS signals from a predetermined number or more of GPS satellites, the current position and current time of the host vehicle can be calculated based on these pieces of information.

  The VICS information receiving unit 15 receives VICS information transmitted from the VICS center to the navigation device 1. When the VICS information receiving unit 15 receives this VICS information, various road traffic information including traffic jam information is acquired in the navigation device 1. The VICS information received by the VICS information receiving unit 15 is output to the control unit 10.

  The control unit 10 displays the traffic congestion bar graph on the display monitor 16 based on the VICS information output from the VICS information receiving unit 15. In this traffic jam bar graph, the traffic jam status to the destination according to the traffic jam level indicated by the VICS information is displayed. In the VICS information, the traffic congestion state on the road is represented by three levels of congestion, “congested”, “congested”, and “no traffic jam”. “Vehicle congestion” representing the highest congestion level is set in the VICS information for sections with heavy traffic congestion. Set in In a section where there is not much traffic jam, “no traffic jam” indicating the lowest traffic jam level is set. A specific display form of the traffic jam bar graph displayed in accordance with the traffic jam degree will be described later with reference to FIG.

  The transmission of VICS information from the VICS center to the navigation device 1 is performed mainly by radio wave beacons installed on highways, optical beacons installed mainly on general roads, or FM multiplex broadcasting. . The radio wave beacon and the optical beacon transmit VICS information locally to the vehicle passing near the installation point by radio waves or light (infrared rays). In contrast, FM multiplex broadcasting can transmit VICS information to a relatively wide area.

  The display monitor 16 is a device for displaying various images and videos, and a liquid crystal display or the like is used. The display monitor 16 displays a map around the vehicle position. The display monitor 16 is installed at a position that is easy to see from the driver's seat, for example, on the dashboard of the host vehicle or in the instrument panel. The speaker 17 outputs a route guidance voice or the like under the control of the control unit 10.

  The input device 18 is a device for a user to perform various input operations for operating the navigation device 1 and includes various input switches. The user operates the input device 18 to input, for example, the name of a facility or point desired to be set as the destination, select a destination from registered locations registered in advance, or select any map on the map. Or scroll in the direction. The input device 18 can be realized by an operation panel, a remote controller, or the like. Alternatively, the input device 18 may be a touch panel integrated with the display monitor 16.

  When the user operates the input device 18 to set a destination, the navigation device 1 performs a predetermined algorithm operation based on the above-described route calculation data using the current position of the host vehicle as the departure point, thereby Route search from to the destination. The route obtained by this route search is set as a recommended route to the destination. When the recommended route is set in this way, the recommended route is displayed on the map separately from other roads by a method such as using a color different from that of the other roads. Thereby, the user can easily recognize the recommended route on the map screen displayed on the display monitor 16. In addition, the navigation device 1 guides the host vehicle by instructing the traveling direction by an image or voice to the user so that the host vehicle can travel according to the recommended route. In this way, route guidance to the destination is performed.

  FIG. 2 is an example of a map screen displayed on the display monitor 16 when performing route guidance to the destination as described above. In this map screen, the position of the host vehicle is indicated by a position mark 20. A road indicated by a bold line on the map represents a recommended route to the destination.

  When the host vehicle approaches within a predetermined distance from the guidance intersection 21, a map screen as shown in FIG. 3 is displayed instead of the map screen of FIG. On this map screen, traffic congestion bar graphs 22, 23, and 24 that indicate the traffic congestion status to the destination in each traveling direction are displayed for each traveling direction of the guidance intersection 21. The traffic jam bar graph 22 corresponds to the right turn direction, that is, the traveling direction of the recommended route, and the traffic jam bar graphs 23 and 24 correspond to the straight travel direction and the left turn direction, respectively. Note that the traffic jam bar graph 23 corresponding to the straight direction is displayed near the guidance intersection 21. On the other hand, the traffic congestion bar graphs 22 and 24 respectively corresponding to the right turn direction and the left turn direction are displayed in the vicinity of the intersection where the own vehicle should pass after the guidance intersection 21 when the own vehicle travels in that direction. .

  The lengths of the traffic congestion bar graphs 22 to 24 correspond to the length of the optimum route to the destination in each traveling direction, that is, the distance to the destination on the route having the shortest arrival time to the destination. . In the map screen of FIG. 3, the traffic jam bar graph 22 in the right turn direction is the longest, the traffic jam bar graph 24 in the left turn direction is next long, and the traffic jam bar graph 23 in the straight direction is the shortest. That is, it can be seen that the distance to the destination is the longest in the right turn direction, the longest in the left turn direction, and the shortest in the straight direction.

  Moreover, the display forms of the traffic congestion bar graphs 22 to 24 indicate the traffic congestion status on the optimum route to the destination in each traveling direction. In the map screen of FIG. 3, the traffic congestion bar graph 22 in the right turn direction indicates that the congestion level of all portions is “no traffic jam”. Therefore, when going in the right turn direction, it can be seen that there is no congested section between the destination and the destination. On the other hand, in the traffic congestion bar graph 23 in the straight line direction, the portion 31 indicating “congestion” occupies the majority, and the ratio between the portion 32 indicating “congestion” and the portion 33 indicating “no congestion” is small. ing. Therefore, it can be seen that traffic jam is severe when going straight ahead. Further, in the traffic jam bar graph 24 in the left turn direction, portions 34 and 36 indicating “congestion” and a portion 35 indicating “congestion” exist between the portions indicating “no traffic jam”. Therefore, if it goes to the left turn direction, it turns out that the traffic congestion area is dotted to the destination.

  By displaying the traffic jam bar graphs 22 to 24 as described above, the user driving the vehicle can know the traffic jam situation to the destination for each traveling direction of the guidance intersection 21. That is, if you proceed in the right turn direction according to the recommended route, you can avoid traffic congestion with a long distance to the destination, but if you proceed in the straight direction, you can see that the distance to the destination is short but you must pass through the traffic congestion section. If you turn left, you can see that the distance to the destination is not very long, but you have to pass through a traffic jam section in some places. Thereby, the user can determine which direction of travel the user should proceed.

  FIG. 4 shows a flowchart of processing executed when the map screen as described above is displayed. This flowchart is executed by the control unit 10. In step S10, a map is displayed on the display monitor 16. Here, a road map with a predetermined scale is displayed around the vehicle position.

  In step S20, the destination is set by the method as described above. In step S30, a recommended route from the vehicle position to the destination set in step S30 is searched. In step S40, the recommended route searched in step S30 is displayed on the map displayed in step S10. Thereby, a map screen as shown in FIG. 2 showing the recommended route on the map is displayed. Thereafter, the map is scrolled according to the travel of the host vehicle, and route guidance according to the recommended route is performed.

  In step S50, it is determined whether or not the host vehicle has approached the next guidance intersection. Until the host vehicle approaches the next guidance intersection, it stays at step S50. When the distance from the vehicle position to the next guided intersection on the recommended route is within a predetermined distance, it is determined that the host vehicle has approached the guided intersection, and the process proceeds to the next step S60. At this time, the next guidance intersection existing within a predetermined distance from the vehicle position on the recommended route searched in step S30 is selected as a subsequent processing target.

  In step S60, one of the destination roads at the next guidance intersection is selected. That is, one of the roads connected to the guidance intersection is selected from the roads excluding the road on which the vehicle is traveling. The processes of steps S70 to S100 described below are executed for the road selected here.

  In step S70, the optimum route to the destination set in step S20 is searched for the road selected in step S60. At this time, a route having the shortest arrival time to the destination in the traveling direction corresponding to the selected road is searched for as the optimum route to the destination. However, if a recommended route has already been set for the direction of travel of the road as shown in the right turn direction of FIG. 2, the recommended route may be set as the optimum route, so that a new optimum route is searched here. There is no need to do. Note that, when it is assumed that the host vehicle has made a turn at the next guidance intersection in the direction of the road, a point where the host vehicle should pass immediately after that is set at the start point of the optimum route, that is, the route search start point.

  In step S80, the distance of the optimum route searched in step S70 is calculated. Here, the length of each link included in the optimum route searched in step S70 is obtained from the map data, and the length of each link is summed from the start point to the end point, that is, the destination, to reach the destination in the optimum route. Calculate the distance.

  In step S90, the congestion information of the optimum route searched in step S70 is acquired. Here, the VICS information received by the VICS information receiving unit 15 is input in the control unit 10, and the congestion information set for each link included in the optimum route searched in step S70 is selected from the VICS information. By extracting, traffic congestion information to the destination is acquired for the optimum route.

  In step S100, a traffic congestion bar graph is displayed for the traveling direction of the road selected in step S60 based on the distance of the optimal route calculated in step S80 and the traffic congestion information of the optimal route acquired in step S90. At this time, as described above, the length of the traffic jam bar graph is determined according to the distance of the optimal route, and the display mode of the traffic jam bar graph is determined according to the traffic jam information of the optimal route. Thereby, the traffic jam bar graphs 22 to 24 as shown in FIG. 3 are displayed. At this time, as shown in FIG. 3, a traffic jam bar graph may be displayed near the guidance intersection or the next intersection, or a traffic jam bar graph may be displayed at another position, for example, a predetermined position in the screen. May be.

  In step S110, it is determined whether all the destination roads have been selected in step S60. When all of the destination roads have been selected, that is, the processing of steps S70 to S100 is executed for all the destination roads at the next guidance intersection, and as a result, for each direction of travel of the guidance intersection. If the traffic congestion bar graph has already been displayed, the process proceeds to step S120. On the other hand, if there is a road that has not been selected yet, the process returns to step S60. Then, after selecting any one of the unselected roads in step S60, the above processing is repeated.

  In step S120, it is determined whether or not the host vehicle has passed the guidance intersection displaying the traffic jam bar graph by performing the processing described above. The host vehicle stays at step S120 until the host vehicle passes through the guidance intersection. When the host vehicle passes through the guidance intersection, the process proceeds to the next step S130.

  In step S130, the traffic jam bar graph displayed in step S100 is deleted from the display monitor 16. As a result, the traffic congestion bar graph is deleted after passing the guidance intersection. If step S130 is performed, it will return to step S50 and will repeat the process demonstrated above. As a result, whenever the host vehicle approaches the next guidance intersection, the traffic jam bar graph as shown in FIG. 3 is displayed for each traveling direction, and the user is notified of the traffic jam situation to the destination for each traveling direction. .

  As described above, when the traffic jam bar graph is displayed every time the vehicle approaches the next guided intersection, if the change from the traffic jam bar graph displayed last time is large, the user is notified of this. You may make it do. That is, when either the traffic jam bar graph displayed last time or one of the traffic jam bar graphs displayed this time displays the traffic congestion status of the common optimal route, and the traffic congestion status has changed greatly. Informs the user by flashing the changed part. In this way, it is possible to easily notify the user that the traffic jam has changed.

According to the embodiment described above, the following operational effects are obtained.
(1) When approaching the next guidance intersection (step S50), the guidance intersection is selected as a processing target, and the optimum route to the destination is searched for each traveling direction of the guidance intersection (step S70). Congestion information to the destination is acquired for each optimum route thus searched (step S90), and based on the obtained congestion information, the traffic situation of each optimum route is displayed as a congestion bar graph (step S100). It was. Since it did in this way, about the guidance intersection made into the process target, a user can be notified of the traffic congestion condition to the destination for every traveling direction of the own vehicle. Therefore, the user can appropriately determine whether or not to bypass the traffic jam section.

(2) In step S100, based on the traffic jam information acquired in step S90, the traffic jam on the optimum route is displayed on each part of the traffic jam bar graph according to the traffic jam degree set in the traffic jam information. The display form of the traffic jam bar graph indicating the situation is determined. By displaying the congestion bar graph with the display form determined in this way for each optimum route, the congestion situation of each optimum route is displayed. Since it did in this way, the traffic congestion condition to the destination can be displayed at a glance clearly about each optimal route.

(3) Further, in step S100, the length of the traffic jam bar graph is determined based on the distance to the destination on the optimum route calculated in step S80. Since it did in this way, about each optimal route, the approximate distance to a destination can be displayed easily at a glance with traffic conditions. Therefore, the user can more accurately determine an appropriate traveling direction.

(4) The control unit 10 detects the vehicle position based on the outputs from the vibration gyro 11, the vehicle speed sensor 12, and the GPS receiving unit 14, and searches for a recommended route from the vehicle position to the destination (step S30). ). When the next guidance intersection approaches within the predetermined distance from the vehicle position on the recommended route searched in this way (step S50), the guidance intersection is selected as a subsequent processing target. Since it did in this way, every time the own vehicle approaches the next guidance intersection during route guidance to the destination, it is possible to notify the user of the traffic jam situation to the destination for each traveling direction of the own vehicle at the guidance intersection. it can.

  In the embodiment described above, an example of acquiring traffic jam information using VICS information has been described. However, traffic jam information may be acquired by other methods. For example, the traffic information can be acquired by providing a center for collecting traffic information and accessing the center from a navigation device by communication via a mobile phone line. Alternatively, statistical traffic information based on statistical values of past traffic jam information can be stored in the navigation device, and traffic jam information can be acquired using this statistical traffic information. In addition to this, traffic information can be acquired by various methods.

-Second Embodiment-
Next, a second embodiment of the present invention will be described. The navigation device according to the present embodiment displays, in addition to displaying the current traffic jam status, for each optimum route to the destination searched as described above, a change according to the traffic jam time in the future. The configuration of the navigation device according to the present embodiment is the same as that of the navigation device according to the first embodiment shown in FIG.

  FIG. 5 shows an example of a map screen that is displayed when approaching within a predetermined distance from the guidance intersection during route guidance to the destination in the navigation device of the present embodiment. On this map screen, traffic congestion bar graphs 42, 43 and 44 are displayed for each traveling direction of the guidance intersection 21, indicating changes in the traffic congestion status to the destination in each traveling direction. The traffic jam bar graph 42 corresponds to the right turn direction, that is, the traveling direction of the recommended route, and the traffic jam bar graphs 43 and 44 correspond to the straight travel direction and the left turn direction, respectively.

  The lengths in the vertical direction of the traffic jam bar graphs 42 to 44 respectively correspond to the lengths of the optimum routes to the destination in each traveling direction, similarly to the traffic jam bar graphs 22 to 24 shown in FIG. Further, the display forms of the traffic jam bar graphs 42 to 44 indicate the traffic jam status on the optimum route to the destination in each traveling direction.

In the traffic jam bar graphs 42 to 44, the horizontal position represents the time in the future. For example, if the current time is T ₀ and the times after 10 minutes, 20 minutes, 30 minutes, and 40 minutes are expressed as times T ₁₀ , T ₂₀ , T ₃₀ , and T ₄₀ , respectively, The traffic jam situation is represented by traffic jam bar graphs 42-44. Thereby, the change according to the time of the traffic jam situation of each optimum route in the future is shown.

  By displaying the traffic jam bar graphs 42 to 44 as described above, the user can see how the traffic situation changes with the passage of time when he / she travels by selecting one of the optimum routes. Judgment can be made. Therefore, the user can make a more appropriate determination as to the direction to proceed. For example, by determining whether there is a possibility that the traffic jam will be resolved before arriving at the traffic jam, or by determining whether the traffic jam will occur even if there is no traffic jam now, the appropriate direction of travel can be determined. You can choose.

  The congestion bar graphs 42 to 44 as described above can be displayed based on the statistical traffic information described above. That is, statistical traffic information based on statistical values of past traffic jam information is stored in the navigation device of the present embodiment. Based on this statistical traffic information, future traffic congestion information on each optimum route is predicted. By acquiring the future traffic information predicted in this way in step S90 of FIG. 4, in step S100, changes according to the time of the traffic status of each optimum route in the future are displayed by the traffic congestion bar graphs 42 to 44. Can do. Alternatively, a center for distributing traffic jam information may be provided, and future traffic jam information may be predicted based on statistical traffic information at this center and distributed to the navigation device.

  In the above description, for each optimal route corresponding to the direction of travel of the next guidance intersection, the future traffic information predicted based on statistical traffic information is obtained, and based on that, the traffic on each optimal route in the future is acquired. It was decided to display changes in the situation. However, by acquiring past traffic jam information based on the past traffic jam history or the like, changes in the past traffic jam status may be displayed instead of the future. Or you may make it display the change of traffic conditions about both the future and the past. That is, the navigation device of the present embodiment acquires traffic information to the destination for at least one of the past and the future, and changes according to the time of the traffic status of each optimum route based on the acquired traffic information Can be displayed. As a result, it is possible to determine whether or not a sudden traffic jam has occurred due to an accident or the like, or to determine whether or not the traffic jam is normal even if there is no traffic jam now.

According to the second embodiment described above, the following operational effects are obtained.
(1) Congestion information to the destination is acquired for at least one of the past and the future, and a change according to the time of the congestion state of each optimum route is displayed based on the acquired congestion information. Since it did in this way, the user can judge the optimal advancing direction reliably from the mode of the change of traffic conditions.

(2) Obtains future traffic information predicted based on statistical traffic information based on statistical values of past traffic information, and displays the traffic status of each optimal route in the future based on the acquired future traffic information It was decided to. Since it did in this way, the user can judge the optimal advancing direction by the future traffic jam condition.

  In each of the embodiments described above, the traffic jam bar graph as shown in FIG. 3 or FIG. 5 is displayed when the next approaching intersection is approached, but may be displayed in other situations. For example, a traffic jam bar graph may be displayed when a reroute is executed according to the occurrence of traffic jams, or when a recommended route is heading in a direction different from the shortest route to the destination. Alternatively, an intersection other than the guidance intersection on the recommended route may be targeted. For example, a traffic jam bar graph can be displayed at intersections designated by the user on the map, main intersections, and the like.

  In each of the above-described embodiments, the example of displaying a traffic jam bar graph on a planar map has been described. However, a similar traffic jam bar graph can be displayed on a three-dimensional map, a bird's-eye view map, or the like. In that case, the traffic jam bar graph may be displayed in a three-dimensional shape.

  Each embodiment and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired.

  In the embodiment described above, each unit described in the claims is realized by the processing executed in the control unit 10 of the navigation device 1. That is, the control unit 10 of the navigation device 1 can function as destination setting means, intersection selection means, optimum route search means, traffic jam information acquisition means, display control means, own vehicle position detection means, and recommended route search means. . In addition, since the above description is an example to the last, when interpreting invention, the correspondence of the description matter of embodiment and the description matter of a claim is not limited or restrained at all.

It is a block diagram which shows the structure of the navigation apparatus by one Embodiment of this invention. It is a figure which shows the example of the map screen displayed during route guidance. In 1st embodiment of this invention, it is a figure which shows the example of the map screen displayed when the own vehicle approaches within a predetermined distance from a guidance intersection. It is a flowchart of the process performed when displaying a map screen. In 2nd Embodiment of this invention, it is a figure which shows the example of the map screen displayed when the own vehicle approaches within the predetermined distance from the guidance intersection.

Explanation of symbols

1: navigation device, 10: control unit, 11: vibration gyro, 12: vehicle speed sensor,
13: HDD, 14: GPS receiver, 15: VICS information receiver, 16: Display monitor,
17: Speaker, 18: Input device

Claims (5)

Destination setting means for setting the destination;
An intersection selection means for selecting an intersection;
Optimum route search means for searching for an optimum route to the destination for each traveling direction of the intersection selected by the intersection selection means;
For each optimum route searched by the optimum route search means, traffic information acquisition means for acquiring traffic information to the destination;
Based on the traffic jam information acquired by the traffic jam information acquisition means, determine the display form of the traffic jam bar graph indicating the traffic jam status of the optimum route, and display the traffic jam bar graph for each of the optimum routes, respectively, Display control means for displaying the traffic congestion status of each optimum route,
The display control means includes
When displaying a traffic congestion bar graph indicating the traffic congestion status when traveling on each road in the vicinity of each road traveling in each traveling direction of the intersection selected by the intersection selection means , the horizontal position of the traffic congestion bar graph Represents a plurality of times in the future, and the traffic situation at each time is represented by the vertical display of the traffic jam bar graph . Destination setting means for setting the destination;
An intersection selection means for selecting an intersection;
Optimum route search means for searching for an optimum route to the destination for each traveling direction of the intersection selected by the intersection selection means;
For each optimum route searched by the optimum route search means, traffic information acquisition means for acquiring traffic information to the destination;
Based on the traffic jam information acquired by the traffic jam information acquisition means, determine the display form of the traffic jam bar graph indicating the traffic jam status of the optimum route, and display the traffic jam bar graph for each of the optimum routes, respectively, Display control means for displaying the traffic congestion status of each optimum route,
The display control means includes
When displaying a traffic congestion bar graph indicating the traffic congestion status when traveling on each road in the vicinity of each road traveling in each traveling direction of the intersection selected by the intersection selection means , the horizontal position of the traffic congestion bar graph Represents a plurality of times in the past, and represents a traffic jam situation at each time by a vertical display of the traffic jam bar graph . Destination setting means for setting the destination;
An intersection selection means for selecting an intersection;
Optimum route search means for searching for an optimum route to the destination for each traveling direction of the intersection selected by the intersection selection means;
For each optimum route searched by the optimum route search means, traffic information acquisition means for acquiring traffic information to the destination;
Based on the traffic jam information acquired by the traffic jam information acquisition means, determine the display form of the traffic jam bar graph indicating the traffic jam status of the optimum route, and display the traffic jam bar graph for each of the optimum routes, respectively, Display control means for displaying the traffic congestion status of each optimum route,
The display control means includes
When displaying a traffic congestion bar graph indicating the traffic congestion status when traveling on each road in the vicinity of each road traveling in each traveling direction of the intersection selected by the intersection selection means , the horizontal position of the traffic congestion bar graph Represents a plurality of times in the past and the future, and represents a traffic jam situation at each time by a vertical display of the traffic jam bar graph . The navigation device according to any one of claims 1 to 3 ,
The display control means displays a traffic congestion bar graph indicating a traffic congestion situation when traveling on each road, in the vicinity of the next intersection on each road traveling in each traveling direction of the intersection selected by the intersection selection means. A navigation device characterized by the above. In the navigation device according to any one of claims 1 to 4 ,
The navigation apparatus according to claim 1, wherein the display control means determines a length of the traffic jam bar graph in a vertical direction based on a distance to the destination on the optimum route.

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