JP2006317159A - Navigation system, and method for displaying information of traffic congestion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display the traffic congestion in a crossing and to provide it to a user. <P>SOLUTION: The number-of-lane determination part 105b determines the number of lanes of the road before the crossing detected by the crossing detection part 105a, and the directions of progressing capability of each lane. The traffic congestion determination part 105c determines the traffic congestion on the road before the crossing and the roads existing beyond the crossing progress capable directions of each lane based on the information of traffic congestion received by the VICS information receiver 103. The traffic congestion display part 105d displays on the monitor while relating the traffic congestion on the road beyond the crossing with the traffic congestions on each lane before the crossing including the progress capable directions beyond the crossing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a navigation device capable of displaying traffic information at an intersection and a traffic information display method in the navigation device.

  The following navigation apparatus is known from Patent Document 1. According to the navigation device, the traffic information for each lane is displayed on the map displayed on the monitor based on the traffic information received from the VICS center.

JP-A-6-348997

  However, in conventional devices, traffic information for each lane is displayed on a map on a link basis, so at an intersection or the like, the driver can display continuous traffic information between the road before the intersection and the road ahead of the intersection. There was a problem that it was difficult to grasp.

  The present invention is a traffic jam information display method for displaying the status of traffic jam at an intersection, detecting the number of lanes on the road before the intersection and the advancing direction of each lane on the road before the intersection, and the traffic jam information on the road before the intersection , And the traffic congestion information of the road ahead of the intersection extending in the travel direction of each lane, and based on the acquired traffic congestion information, the traffic congestion status of the road before the intersection and the traffic congestion status of the road ahead of the intersection are monitored It is characterized by being displayed in the display area set in (1).

  According to the present invention, the traffic situation on the road before the intersection and the traffic situation on the road ahead of the intersection are displayed in the display area set on the monitor. Thereby, the driver can grasp the continuous traffic situation between the road before the intersection and the road ahead of the intersection by confirming the display in the display area.

  FIG. 1 is a block diagram showing an embodiment of a navigation device in the present embodiment. The navigation apparatus 100 is mounted on a vehicle, and includes a vehicle speed sensor 101 that detects the vehicle speed of the host vehicle, a GPS unit 102 that receives a GPS signal from a GPS (Global Positioning System) satellite and detects the current position of the host vehicle, A VICS information receiving device 103 that receives (acquires) VICS information including traffic jam information, a disk reading device 104 that reads a map disc 104a that stores map data of a plurality of scales (scale ratios), and various processes that will be described later. A control device 105 to be executed, a monitor 106 displaying a map around the host vehicle read from the map disc 104a, a map read from the map disc 104 and traffic information received by the VICS information receiving device 103, and a driver Output guidance voice and route guidance voice And a speaker 107.

  The map disk 104a stores map data of a plurality of scales (scale ratios), and the stored map data includes road data that expresses roads by nodes and links. Nodes correspond to each other, and a line segment connecting each node corresponds to a link. In this embodiment, each node is given a node ID as an identification number, and each link is given a link ID as an identification number. The map data further includes the number of lanes of each link and the travelable direction at the intersection of each link. For example, if a link is a road with three lanes on one side, the left lane includes information on a travelable direction such that the left lane can turn left and go straight, the central lane can go straight, and the right lane can turn right.

  The monitor 106 has a touch panel 106a that can be operated by the user pressing the surface of the monitor, and the user can use the touch panel 106a to operate the navigation device 100 to set a destination. Various other operations can be performed.

  The control device 105 includes an intersection detection unit 105a, a lane number determination unit 105b, a traffic jam status determination unit 105c, and a traffic jam status display unit 105d. The intersection detection unit 105a detects the current position of the host vehicle on the map based on the output from the GPS unit 102, and refers to the map data so that the intersection is within a predetermined distance in the traveling direction from the host vehicle, for example, within 30m. Determine if it exists.

  The lane number determination unit 105b determines the lane of the road that is running at the intersection based on the map data read by the disk reader 104 when the intersection detection unit 105a determines that there is an intersection within a predetermined distance from the host vehicle. Determine the number and possible travel direction of each lane.

  Based on the VICS information received via the VICS information receiving device 103, the traffic congestion status determination unit 105c extends in each direction from the traffic lane of the road that is running at the intersection detected by the intersection detection unit 105a and each lane. The traffic situation of the road to be judged is determined in three stages: “traffic jam”, “crowded”, and “no traffic jam”. That is, the traffic congestion status is determined for all links connected to the node corresponding to the intersection.

  For example, in the example shown in FIG. 2, when there is an intersection 2b within a predetermined distance from the current position 2a of the host vehicle, the congestion situation of all the links 2c to 2f connected to the node corresponding to the intersection 2b is shown. judge. As a result, the traffic situation on the road 2c before the intersection 2b, the traffic situation on the road 2d ahead of the intersection 2b, the traffic situation on the left road 2e of the intersection 2b, and the traffic situation on the right road 2f of the intersection 2b Can be grasped.

  The traffic condition display unit 105d displays the traffic condition determined by the traffic condition determination unit 105c in the traffic information display area 2g (display area) shown in FIG. A traffic information display area 2g in FIG. 2 shows a specific example when the lane number determination unit 105b determines that the road on the intersection 2b is a three-lane road, and the traffic information display area 2g Congestion status display for each traveling direction for displaying the traffic lane information display region 2h having lane regions 1 to 3 for the number of lanes, and the traffic congestion status display regions 4 to 6 corresponding to each lane region. Region 2i.

  The lane information display area 2h has a left lane area 1, a center lane area 2, and a right lane area 3 corresponding to each lane, and the lane travel direction is indicated in each lane area. The symbol that represents is displayed. Further, the traffic direction display area 2i according to the traveling direction has traffic condition display areas 4 to 6 which are paired with the lane areas 1 to 3 adjacent to the upper portions of the lane areas 1 to 3, respectively. In the status display areas 4 to 6, the traffic congestion status in the travelable direction of each lane is displayed. When the number of lanes at the intersection is two lanes, or when the number of lanes is four or more, a lane area corresponding to the number of lanes and a congestion status display area are displayed according to the number of lanes at each intersection.

  For example, at the intersection 2b, when the direction in which the left lane can travel is straight or left turn, the left lane area 1 and the left congestion condition display area 4 are paired with the left lane area 1 in the straight direction and the left turn direction. Is displayed. When the traveling direction of the central lane is straight, the traffic situation in the straight direction ahead of the intersection 2b is displayed in the central traffic situation display area 5 that is paired with the central lane area 2. When the right lane travel direction is a right turn, the traffic congestion situation in the right turn direction ahead of the intersection 2b is displayed in the right traffic situation display area 6 paired with the right lane area 3.

  In displaying traffic information in the traffic information display area 2g, the traffic congestion status display unit 105d first displays the traffic congestion status ahead of the intersection 2b determined by the traffic congestion status determination unit 105c in the traffic congestion status display area 2i according to the traveling direction. . In the present embodiment, the traffic congestion status display areas 4 to 6 in the traffic congestion status display area 2i for each traveling direction are displayed in different colors according to the traffic congestion status, that is, the degree of traffic congestion. For example, if the traffic situation at the intersection is “congested”, the traffic situation display area is changed to red (colored), and if the traffic situation is “congested”, the traffic situation display area is changed to yellow. If the traffic situation is “no traffic jam”, the traffic status display is kept in the initial color, that is, the road color of the map data.

  If there are two possible travel directions and the traffic conditions are different, as shown in the left traffic jam status display area 4, the traffic jam is matched to the travel direction of the heavy traffic jam (the traffic jam is high). Change the color of the status display area.

  For example, the traffic situation determination unit 105c determines that the traffic situation of the road 2d ahead of the intersection 2b is “no traffic”, the traffic situation of the road 2e at the left turn of the intersection 2b is “congested”, and the road 2f of the right turn at the intersection 2b. Is determined to be “congested”, the left traffic situation display area 4 including the left turn in the travel direction is red, and the right traffic situation display area 6 including the right turn in the travel direction is yellow ( Or the orange color), and the central traffic situation display area 5 including only the straight line in the traveling direction is left as the initial color.

  The traffic congestion status display unit 105d displays the information before the intersection when the traveling direction of any of the above-mentioned intersections is “congestion” or “congestion” and the traffic congestion status before the intersection is “congestion” or “congestion”. The relevance between the traffic congestion status and the traffic congestion status at the intersection is displayed in the lane information display area 2h. In other words, if the traffic condition at the intersection is “congested” or “congested” and the traffic condition before the intersection is also “congested” or “congested”, the influence of “congested” or “congested” at the intersection Therefore, it can be considered that the traffic is “congested” or “crowded” before the intersection. In other words, it can be considered that the “congestion” or “congestion” at the intersection is connected up to the intersection.

  For this reason, when the traffic situation in any of the possible directions ahead of the intersection 2b is “congested” or “crowded”, the traffic situation in front of the intersection 2b is also “congested” or “crowded”. The lane regions 1 to 3 corresponding to the lanes before the intersection including the intersection ahead that is “congested” or “congested” at the intersection 2b in the travelable direction are displayed in different colors according to the traffic conditions.

  The color coding method for the lane areas 1 to 3 is the same as the color coding method for the traffic congestion status display areas 4 to 6. For example, if the traffic congestion status in front of the intersection 2b is “traffic jam”, the lane area is changed to red. If the traffic is “congested”, the lane area is changed to yellow. Further, if the traffic condition is “no traffic jam”, the lane area is left in the initial color. This makes it possible to display the traffic situation ahead of the intersection 2b and the traffic situation before the intersection 2b in association with the travelable direction for each lane before the intersection 2b.

  FIGS. 3 to 7 show specific examples of a plurality of patterns in a case where the traffic congestion status ahead of the intersection 2b and the traffic congestion status before the intersection 2b are displayed in the traffic information display area 2g in association with each other.

  FIG. 3 shows the traffic jam situation of the road 2c before the intersection 2b when the traffic jam situation of the road 2e at the left turn of the intersection 2b is “congested” and the traffic jam situation of the road 2f at the right turn of the intersection 2b is “congested”. FIG. 6 is a diagram illustrating a display example on the monitor 106 when “congestion” is displayed.

  In the example shown in FIG. 3, in the lane information display area 2 h in the traffic information display area 2 g and the congestion condition display area 2 i by traveling direction, the left traffic condition display area 4 including a left turn in the travelable direction, and the pair The left lane area 1 is changed to red. Further, the right traffic situation display area 6 including a right turn in the advancing direction is changed to yellow, and the right lane area 3 corresponding to the right traffic condition display area 6 is changed to red. Then, the central congestion state display area 5 including only the straight traveling in the advancing direction and the central lane area 2 paired therewith are left in the initial colors.

  FIG. 4 shows an example of display on the monitor 106 when the traffic congestion state of the road 2d ahead of the intersection 2b is “congestion” and the traffic congestion state of the road 2c before the intersection 2b is “congestion”. FIG.

  In the example shown in FIG. 4, in the lane information display area 2h in the traffic information display area 2g and the congestion status display area 2i according to the traveling direction, the left traffic condition display area 4 including the straight traveling in the traveling direction and the central traffic condition display The region 5 and the left lane region 1 and the center lane region 2 that are paired with the region 5 are changed to red. Further, the right traffic situation display area 6 that does not include straight ahead in the travelable direction and the right lane area 3 that is paired with the right traffic condition display area 6 are left in the initial color.

  FIG. 5 shows the traffic jam situation of the road 2c before the intersection 2b when the traffic jam situation of the road 2d ahead of the intersection 2b is “congested” and the traffic jam situation of the road 2f at the right turn of the intersection 2b is “jamming”. FIG. 6 is a diagram illustrating a display example on the monitor 106 when “congestion” is displayed.

  In the example shown in FIG. 5, in the lane information display area 2h in the traffic information display area 2g and the congestion status display area 2i according to the traveling direction, the left traffic condition display area 4 including the straight traveling in the traveling direction and the central traffic condition display The area 5 is changed to yellow, and the left lane area 1 and the center lane area 2 that are paired with each area are changed to red. Further, the right traffic situation display area 6 including a right turn in the advancing direction and the right lane area 3 paired therewith are changed to red.

  FIG. 6 shows a display example on the monitor 106 when the traffic congestion state of the road 2e ahead of the intersection 2b is “congested” when the traffic congestion state of the road 2e at the left turn of the intersection 2b is “congested”. FIG. In the example shown in FIG. 6, in the lane information display area 2h in the traffic information display area 2g and the congestion condition display area 2i by traveling direction, the left traffic condition display area 4 including a left turn in the travelable direction is changed to yellow. The left lane region 1 that is paired with it is changed to red. In addition, the central traffic situation display area 5 and the right traffic situation display area 6 that do not include a left turn in the travelable direction, and the central lane area 2 and the right lane area 3 that are paired with the central traffic situation display area 5 and the right traffic lane area 3 are left in their initial colors.

  FIG. 7 shows an example of display on the monitor 106 when the traffic situation of the road 2f at the right turn of the intersection 2b is “congested” and the traffic situation of the road 2c before the intersection 2b is “congested”. FIG. In the example shown in FIG. 7, in the lane information display area 2h in the traffic information display area 2g and the congestion condition display area 2i by traveling direction, the right traffic condition display area 6 including a right turn in the travelable direction, and the pair The right lane area 3 is changed to red. Further, the left traffic area display area 4 and the central traffic condition display area 5 that do not include a right turn in the travelable direction, and the left lane area 1 and the central lane area 2 that are paired with the left traffic area display area 4 are left in the initial colors.

  FIG. 8 is a flowchart showing the processing of the navigation device 100 in the present embodiment. The process shown in FIG. 8 is executed by the control device 105 as a program that is started when the power of the navigation device 100 is turned on by turning on the ignition switch of the vehicle.

  In step S10, the intersection detection unit 105a detects the current position of the host vehicle on the map based on the output from the GPS unit 102, proceeds to step S20, refers to the map data, and moves in the direction of travel from the host vehicle. It is determined whether an intersection exists within a predetermined distance, for example, within 30 m. If it is determined that there is an intersection within a predetermined distance from the host vehicle, the process proceeds to step S30.

  In step S30, the lane number determination unit 105b determines, based on the map data read by the disk reader 104, the number of road lanes on the road detected by the intersection detection unit 105a and the direction in which each lane can travel. (Detection), and the process proceeds to Step S40.

  In step S40, the traffic condition determination unit 105c, based on the VICS information received via the VICS information receiving device 103, the traffic condition on the road that is running at the intersection, that is, the road before the intersection, and the travel direction of each lane. As described above, the traffic situation of each road extending to the road, that is, each road ahead of the intersection, is determined in three stages: “congested”, “congested”, and “no traffic jam”. Thereafter, the process proceeds to step S50.

  In step S50, it is determined whether or not the traffic condition on any of the roads ahead of the intersection is “congested” or “congested”. As a result, if it is determined that the traffic congestion status of any road ahead of the intersection is not “congestion” or “crowded”, that is, the traffic congestion status of all roads ahead of the intersection is “no traffic jam”, the steps described later Proceed to S90. On the other hand, if it is determined that the traffic congestion state on any of the roads ahead of the intersection is “congestion” or “congestion”, the process proceeds to step S60.

  In step S60, as described above, the traffic congestion status display unit 105d changes the color of the traffic congestion status display areas 4 to 6 including the road with the traffic congestion status "congested" in the travelable direction among the roads ahead of the intersection to red. The color of the traffic congestion status display areas 4 to 6 including the road in which the traffic congestion status is “congested” in the travelable direction is changed to yellow (or orange). Thereafter, the process proceeds to step S70.

  In step S <b> 70, it is determined whether the traffic condition on the road before the intersection is “congested” or “congested”. As a result, if it is determined that the traffic condition on the road before the intersection is not “congested” or “congested”, the process proceeds to step S90 described later. On the other hand, if it is determined that the traffic condition on the road before the intersection is “congested” or “congested”, the process proceeds to step S80.

  In step S80, as described above, the traffic congestion status display unit 105d displays the traffic lane areas 1 to 3 corresponding to the lanes before the intersection including the “congested” or “crowded” intersection ahead in the travelable direction. Display in different colors according to the situation. For example, in the case where the lane areas 1 to 3 corresponding to the lane before the intersection including the intersection ahead that is “congested” or “congested” in the traveling direction, and the road condition of the road before the intersection is “congested” The color is changed to red, and when it is “congested”, it is changed to yellow. Thereafter, the process proceeds to step S90.

  In step S90, it is determined whether or not the ignition switch of the vehicle is turned off. If it is determined that the ignition switch is not turned off, the process returns to step S10 and the process is repeated. On the other hand, if it is determined that the ignition switch is turned off, the process is terminated.

According to the present embodiment described above, the following operational effects can be obtained.
(1) When there is an intersection within a predetermined distance from the host vehicle, the traffic situation on the road ahead of the intersection and the traffic situation on each lane of the road on which the host vehicle is traveling are displayed in the traffic information display area 2g. I tried to do it. As a result, the user can grasp the traffic situation on the road ahead of the intersection and the traffic situation on the road before the intersection in association with each other in the traffic information display area 2g.

(2) When the traffic condition of the road ahead of the intersection is “congested” or “congested” and the traffic condition of the road before the intersection is “congested” or “crowded”, the traffic condition of the road ahead of the intersection and the intersection Displayed in association with the traffic situation on the road in front. As a result, if the road ahead is “congested” or “crowded”, it is highly likely that the road ahead is also “congested” or “crowded” under the influence of the intersection. In addition, it is possible to display the traffic conditions of the road ahead of the intersection and the road before the intersection in association with the user.

(3) In order to display the traffic situation of the road ahead of the intersection in association with the traffic situation of each lane of the road on which the host vehicle is traveling, the lane areas 1 to 3 corresponding to the respective lanes at the intersection and the lane areas The traffic congestion status display areas 4 to 6 corresponding to the directions in which each lane can travel are provided, and the traffic congestion status before and at the intersection is displayed in the lane areas 1 to 3 and the traffic congestion status display areas 4 to 6. I tried to do it. As a result, the user can accurately grasp the traffic congestion on the road in the travelable direction for each lane at the intersection.

(4) The traffic condition display areas 4 to 6 are displayed (placed) on the upper part of the corresponding lane areas 1 to 3 for display. This makes it possible to clearly show the relevance between each lane area and each traffic condition display area to the user.

(5) When displaying traffic conditions in the lane information display area 2h and the traffic condition-specific traffic condition display area 2i, the colors of the lane areas 1 to 3 and the traffic condition display areas 4 to 6 included in the traffic information Displayed in different colors according to the degree of situation. As a result, the user can grasp the traffic situation without gazing at the monitor 106, and can grasp the traffic situation near the front intersection using a short time such as waiting for a signal.

-Modification-
In addition, the navigation apparatus of embodiment mentioned above can also be deform | transformed as follows.
(1) In the above-described embodiment, an example in which the user operates the navigation device 100 using the touch panel 106a has been described. However, the present invention is not limited to this, and other input devices such as a joystick are provided. You may make it operate the navigation apparatus 100 using an input device.

(2) In the above-described embodiment, an example is described in which the color of each lane area and each traffic condition display area is changed according to the traffic condition of each lane and the degree of the traffic condition in the travelable direction of each lane. did. However, the present invention is not limited to this, and icons such as icons indicating the degree of traffic congestion in each lane area and each traffic condition display area based on the traffic condition in each lane and the traffic condition in the direction in which each lane can travel. Symbols may be displayed, or may be displayed by a method that can clearly indicate the degree of other traffic congestion.

(3) In the above-described embodiment, the example in which the traffic congestion status display area displays the traffic congestion status on the road in the direction in which each lane can travel has been described. However, the present invention is not limited to this. For example, as in the example shown in FIG. 2, a straight road, a left turn direction, and a right turn direction link are connected to a node corresponding to an intersection on the map data along with the traveling road. In such a case, the traffic congestion status display area may be associated with the link in each traveling direction, and the traffic congestion status of the road in each traveling direction may be displayed.

  That is, in the example shown in FIG. 2, the traffic congestion situation in the left turn direction ahead of the intersection 2 b is displayed in the left traffic congestion display area 4 that is paired with the left lane area 1, and the central traffic congestion situation that is paired with the central lane area 2. The display area 5 displays the traffic situation in the straight direction ahead of the intersection 2b. In addition, the traffic situation in the right turn direction ahead of the intersection 2b is displayed in the right traffic situation display area 6 paired with the right lane area 3. As a result, the user can accurately grasp which road in the traveling direction ahead of the intersection is “congested” or “crowded”.

(4) In the above-described embodiment, the case has been described where, when an intersection exists within a predetermined distance from the host vehicle, the traffic congestion state at the intersection is displayed. However, the present invention is not limited to this. For example, the present invention can be applied to a case where a traffic jam situation at an arbitrary intersection on a map designated by the user is displayed.

(5) In the embodiment described above, if any of the traveling directions at the intersection is “congested” or “congested”, and the traffic congestion state before the intersection is “congested” or “congested”, the intersection The example in which the relevance between the traffic situation in front and the traffic situation at the intersection is displayed in the lane information display area 2h has been described. However, the present invention is not limited to this. Even if the direction of travel at any of the intersections is not “congested” or “congested”, if the traffic situation before the intersection is “congested” or “congested”, May be displayed in the lane information display area 2h.

(6) In the above-described embodiment, the traffic information display area 2g is displayed on the monitor 106 displaying a map as shown in FIG. However, the present invention is not limited to this, and other display forms may be used. For example, the display area on the monitor 106 may be divided into two, a map may be displayed on one side, and the traffic information display area 2g may be displayed on one side. A translucent traffic information display area may be displayed on the map displayed on the monitor 106. 2g may be superimposed and displayed. Alternatively, the display on the monitor 106 may be switched to display only the traffic information display area 2g.

(7) In the above-described embodiment, an example in which the navigation device 100 is mounted on a vehicle has been described. However, the present invention is not limited to this, and the navigation device 100 may be mounted on another moving body, or may be a portable information terminal or other device. You may make it mount in information equipment.

  Note that the present invention is not limited to the configurations in the above-described embodiments as long as the characteristic functions of the present invention are not impaired.

  The correspondence between the constituent elements of the claims and the embodiment will be described. The VICS information receiving apparatus 103 corresponds to traffic information acquisition means. The above description is merely an example, and when interpreting the invention, there is no limitation or restriction on the correspondence between the items described in the above embodiment and the items described in the claims.

It is a block diagram which shows one Embodiment of the navigation apparatus in this Embodiment. It is a 1st figure which shows the example of a display of the traffic information display area 2g. It is a 2nd figure which shows the example of a display of the traffic information display area 2g. It is a 3rd figure which shows the example of a display of the traffic information display area 2g. It is a 4th figure which shows the example of a display of the traffic information display area 2g. It is a 5th figure which shows the example of a display of the traffic information display area 2g. It is a 6th figure which shows the example of a display of the traffic information display area 2g. It is a flowchart figure which shows the process of the navigation apparatus 100 in this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Navigation apparatus 101 Vehicle speed sensor 102 GPS unit 103 VICS information receiving apparatus 104 Disk reader 104a Map disk 104a
105 control device 105a intersection detection unit 105b lane number determination unit 105c traffic jam status determination unit 105d traffic jam status display unit 106 monitor 106a touch panel 107 speaker

Claims (6)

A navigation device that displays traffic conditions at an intersection,
An intersection detection means for detecting the number of lanes on the road before the intersection and the advancing direction of each lane on the road before the intersection;
Traffic information on the road before the intersection, and traffic information on the road ahead of the intersection extending in the direction in which each lane can travel;
Based on the traffic jam information acquired by the traffic jam information acquisition means, the traffic jam status display means for displaying the traffic jam status of the road before the intersection and the traffic jam status of the road ahead of the intersection in a display area set on a monitor; A navigation device comprising: The navigation device according to claim 1, wherein
The traffic condition display means displays in the display area the lane areas corresponding to the number of lanes of the road before the intersection detected by the intersection detection means in the display area in association with the lanes of the road before the intersection, and before the intersection. A navigation apparatus for displaying a traffic jam situation on a road in the lane area corresponding to each lane as a traffic jam situation for each lane. The navigation device according to claim 2, wherein
The traffic condition display means displays a travel direction area for displaying a traffic condition for each travel direction paired with the lane area in the display area, and is included in a travelable direction of each lane corresponding to the lane area. A navigation apparatus that displays a traffic congestion situation on the road ahead of the intersection in the area for each traveling direction paired with the lane area corresponding to each lane. The navigation device according to claim 3,
The said traffic condition display means displays the said area according to the advancing direction adjacent to the upper part of the said lane area | region which becomes a pair with each area | region according to advancing direction, The navigation apparatus characterized by the above-mentioned. The navigation device according to any one of claims 1 to 4,
The traffic condition display means displays the traffic condition in different colors according to the degree of the traffic. A traffic information display method for displaying traffic conditions at intersections,
Detect the number of lanes on the road before the intersection, and the possible travel directions of each lane on the road before the intersection,
Obtain traffic information on the road before the intersection and traffic information on the road ahead of the intersection extending in the direction in which each lane can travel,
A traffic jam information display method, comprising: displaying a traffic jam situation of a road before the intersection and a traffic jam situation of a road ahead of the intersection in a display area set on a monitor based on the acquired traffic jam information.

Images