Pedestrian street-crossing signal and upstream intersection signal linkage control method and system

Abstract

The invention provides a pedestrian street-crossing signal and upstream intersection signal linkage control method and a system. When a pedestrian street-crossing signal green light is switched on, a waiting period from vehicles fully occupy a pedestrian street-crossing passageway till the vehicles run at an upstream intersection section is predicted. Meanwhile, whether the waiting period is longer than a time period required for pedestrians to pass the pedestrian street-crossing passageway or not is judged. If the waiting time is not longer than the time period required for pedestrians to pass the pedestrian street-crossing passageway, the count-down time period of the pedestrian street-crossing green light is set to be the waiting period. Meanwhile, at the ending of the count-down time period, a pedestrian street-crossing signal red light is switched on instead of the pedestrian street-crossing signal green light. Meanwhile, a vehicle passing direction signal green light is switched on. If the waiting time is longer than the time period required for pedestrians to pass the pedestrian street-crossing passageway, the variation of signal lights is controlled based on the preset delay time of the pedestrian street-crossing signal green light. When the vehicle passing direction signal green light is switched on, the variation of signal lights is controlled based on the preset delay time of the vehicle passing direction signal green light. Through judging the durations of the waiting period and the time period required for pedestrians to pass the pedestrian street-crossing passageway, the variation of signal lights is controlled. In this way, the linkage coordination control of street-crossing signals and upstream intersection signals is realized.

Description

technical field [0001] The invention relates to the field of traffic signal control, in particular to a linkage control method and system for a pedestrian crossing signal and an upstream intersection signal. Background technique [0002] The main participants in urban traffic include vehicles and pedestrians. Pedestrians and vehicles compete for the right of way on the road, and the two interact and influence each other. Whether the traffic control of pedestrians and vehicles is reasonable, orderly, and efficient affects the operation effect of the entire urban traffic control system. [0003] When the pedestrian crossing signal light is green, pedestrians pass through the pedestrian crossing passage; then the signal light in the corresponding direction of motor vehicle traffic is red, and the motor vehicles in this direction will stop and wait for pedestrians to pass through the pedestrian crossing passage. During the time when the signal lights of motor vehicles are red ...

AI Technical Summary

Problems solved by technology

When the distance between the pedestrian crossing channel and the upstream intersection is relatively short, if there are many motor vehicles arriving, or the green light time of the pedestrian crossing signal is unreasonable, the queuing vehicles may spread to the upstream intersection, thereby affecting other direction machines at the upstream intersection. The traffic of motor vehicles reduces the traffic capacity of upstream intersections and increases the delay time of motor vehicles

In the prior art, the control method for each intersection and intersection signal light does not carry out linkage and coordinated control of pedestrian crossing and upstream intersection traffic signal, which leads to vehicles waiting in line during the time when the motor vehicle signal light is red. It is possible to spread to the upstream intersection and affect the traffic flow of the upstream intersection

[0004] In addition, when the road is a section of a two-way passage, and the pedestrian crossing crosses the two-way lane, most of the signal lights in the prior art are controlled uniformly for the two two-way passages, which leads to the fact that when one of the passages does not When pedestrians cross the street, motor vehicles also stop and wait, wasting road resources

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