JP2015076016A - Traffic light display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve efficiency of traffic simulation by enabling a person to understand the aspect of a signal displayed in a display panel of a traffic simulation device by seeing one frame at one traffic intersection.SOLUTION: A traffic light display device in traffic simulation displays the current status of a signal by one frame at all traffic intersections regardless of an installation position and the number of actual traffic lights at the traffic intersections. A frame associated with the traffic intersections and identification numbers is divided corresponding to a road connected thereto, and each divided area is associated with the traffic light and the identification number corresponding thereto, thereby displaying the aspect of a signal in the divided area.

Description

  The present invention relates to a traffic signal display device for displaying a traffic signal display state more easily and visually in a display device for traffic monitoring and traffic simulation (hereinafter collectively referred to as “traffic simulation”).

Conventionally, various traffic simulation apparatuses have been proposed, but no proposal has been made to make it easier to visually recognize the current status of traffic lights.
For example, the display of traffic lights in Japanese Patent Laid-Open No. 2001-208556 displays a frame that is displayed in the same manner as a traffic light installed on a road at a position where it is actually installed. No. 96281 does not propose a specific method for displaying traffic signal information.
Even in devices that have been put into practical use, there is no device that has been specially devised for displaying and displaying signals, as far as the inventors know.
JP 2001-208556 A JP 2011-96281 A

As described above, when displaying the same display frame as the actual traffic signal at the actual traffic signal installation position, four frames are displayed at the intersection of the cross, and the display contents of the four frames are displayed. Without confirmation, it is impossible to understand the allowable traveling route of the vehicle at the intersection.
On the other hand, in the traffic simulation, it is necessary to grasp the traffic situation while observing the entire display screen on which the traffic situation within a certain range (for example, several kilometers square) is displayed. For that purpose, it is required to intuitively grasp the present status of traffic lights at each intersection.
However, conventional display methods cannot meet such demands.

  It is an object of the present invention to improve the efficiency of traffic simulation by making it possible to understand the display of signals displayed on the display panel of a traffic simulation device by viewing one frame at one intersection. is there.

  The traffic signal display device in the traffic simulation of the present invention displays the signal display status in one frame at all intersections regardless of the actual installation positions and number of traffic lights at the intersections.

The traffic signal display device of the present invention is configured as follows.
The traffic signal display device includes a basic information storage unit, a basic information processing unit, and a traffic signal display information processing unit.

The basic information storage unit acquires and stores intersection information and traffic signal installation information from map data, and stores an identification number for each intersection.
The intersection information includes, for each intersection, information indicating how many roads are connected at the intersection and at what angle, and includes width information of the roads to be connected if necessary. These pieces of information are stored under the identification number for each intersection.
The traffic signal installation information includes information on the traffic signal installation location and the road traffic vehicle to which each traffic signal is connected for each intersection. These pieces of information are stored in association with the identification number for each intersection.

  The basic information processing unit generates a signal display display frame for each intersection based on the intersection information and traffic signal installation information stored in the basic information storage unit, and stores the signal display display frame for each intersection.

The signal display display frame has a closed outline centered at the center of the intersection, and the inside of the frame is divided into a plurality of areas corresponding to road connection conditions at the intersection.
The “closed contour” serving as the frame is generally a circular contour or a polygon such as a triangle or a quadrangle, but any specific shape may be used as long as it is a “closed contour”. The frame having the “closed contour” is divided into a plurality of areas such as three divisions if the intersection is a three-way intersection and four divisions if the intersection is a crossroad. In many cases, the dividing line can be formed as a frame that is easily visible by using the center as a base point. However, the dividing line may be divided by a line that does not pass through the center as in the case of the T-junction in FIG. Depending on the connection status of the road, the divided areas may be equally divided or different.
Each frame generated for each intersection is managed with the same identification number as the identification number of the intersection, and a plurality of areas generated for each frame are managed in association with the traffic signal installation information for each area.

The traffic signal display processing unit acquires the traffic signal display data and displays it in a color in a corresponding area.
As described above, the signal display status of each intersection can be displayed in one frame.

  According to the present invention, it is possible to divide a frame based on road connection information at an intersection and display the signal display status of the intersection in one frame. Therefore, on the traffic simulation display screen, the present situation of many intersections can be immediately understood, and the efficiency of the simulation work can be improved.

Map data Example of signal display Another example of signal display

[Basic information storage]
An intersection is extracted from digital map data (see FIG. 1), and an identification number is assigned to each intersection. Note that intersections without traffic lights are not subject to processing in this system, so there is no need to extract them or assign identification numbers. On the other hand, when a signal is installed on a pedestrian crossing for pedestrians, even if it is not an intersection, it is preferable to include it in the object.
Further, the road connecting the intersections is given an identification number for each direction of traffic (up and down line). At this time, the road line segment is also divided at the place where the traffic signal is installed even if it is not an intersection, similarly to the intersection.
The connection status between the intersection and the road is made recognizable by matching the coordinate value of the intersection with the coordinate value of the road end point.
Hereinafter, a crossroad which is a representative intersection will be described as an example.

An identification number (consisting of P10, an identifier P indicating the intersection and a unique number) is assigned to the intersection, and the identification number of the road entering the intersection from the road connection information (L1, L4, L6, L7, It is composed of an identifier L indicating a road and a unique number. In addition, the connection angle between adjacent roads to be connected is acquired as a real number. The intersections P10 are all 90 degrees, and the intersection P11, which is a T-junction, is 90 degrees and 180 degrees. At the same time, the position information of the traffic signal is acquired and the traffic signal identification number (S10-1 to S10-4, composed of the identifier S indicating the traffic signal and the branch number of the unique number of the intersection) is assigned.
These pieces of information are stored in the basic information storage unit of the system.

[Basic Information Processing Department]
In the basic information processing unit, a frame F for signal display display is generated for each intersection based on the basic information.
In the case of a circular contour as shown in FIG. 2, the frame F can be used in common for all intersections, so that contour data can be prepared in advance.
Each frame is assigned the same identification number as the corresponding intersection. If it is a frame corresponding to the intersection P10, the identification number is F10 (consisting of an identifier F indicating a frame and the same unique number as the corresponding intersection).
Next, for each frame, the basic information of the intersection is called based on the identification number, and the frame is divided into a plurality of fan-shaped areas based on the road connection information and the connection angle information. (F10-1, F10-2, F10-3, F10-4, and the branch number of the identification number of each frame). In the division, each area is opened toward the connecting road. The identification number of the traffic signal in the real world corresponding to the road entering the frame F10 and the identification number of the intra-frame traffic signal are associated one-to-one.
At the intersection P10, the traffic light identification number in the real world for the vehicle traveling on the road L1 is S10-1. In the frame F10, the identification number of the intra-frame traffic signal corresponding to the road L1 is F10-1. Similarly, the traffic signal S10-2 for the road L4 is F10-2, the road L6 is S10-3 and F10-3, and the road L7 is S10-4 and F10-4.

[Signal signal display information processing section]
In the traffic signal display information processing section, the traffic signal display information is displayed in the frames generated by the basic information processing section and divided into a plurality of areas.
When the simulation screen is launched, the system is constructed such that a frame having the same identification number as the identification number of each intersection is displayed at the intersection of the displayed map data.
The signal display status at the intersection is obtained from another system. Since each traffic signal is given an identification number, information on the current status is reflected in the traffic signal identification number. The reflected data is reflected in the area managed by the same identification number, and the area corresponding to “blue display” is displayed in blue.
For example, if traffic light S10-1 is displayed in blue at intersection P10, area F10-1 of frame F10 is displayed in blue.

  FIG. 3 shows a frame having a shape other than a circle. By making the outline of the frame other than a circle, the connection state of the road can be reflected in the outline shape of the frame, and the connection state of the road can be easily recognized. Moreover, it becomes easy to discriminate | determine the signal for pedestrians by making the shape of the flame | frame corresponding to the traffic signal for pedestrians notably different from others.

According to the present invention, it is possible to recognize the current signal information for each intersection by one frame. Further, since one frame is arranged at each intersection, it can be displayed in a larger frame than the conventional display in which signal information is displayed for each of a plurality of traffic signals.
Therefore, it is possible to instantly recognize the present status of the traffic lights at the intersection, and to improve the efficiency of the simulation work.

P10 intersection
S10-1 Traffic light in the real world
F10 frame
F10-1 frame traffic light
L1 road

Claims (1)

A traffic light display device for performing traffic monitoring and traffic simulation on a display screen,
The display device includes a basic information storage unit, a basic information processing unit, and a traffic signal display information processing unit,
The basic information storage unit acquires and stores intersection information and traffic signal installation information from map data, and stores an identification number for each intersection,
The basic information processing unit generates a signal display display frame for each intersection based on the intersection information and traffic signal installation information stored in the basic information storage unit, and stores the signal display frame with the identification number,
The signal display display frame is a closed outline centering on the center of the intersection, and the inside of the outline is divided into a plurality of areas corresponding to the connection situation of the road at the intersection,
The traffic signal display processing unit obtains traffic signal display data and displays it in a color in a corresponding area.

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