Special Signal Light Control System at Tram Crossing

Abstract

A signal lamp control system special for a tramcar intersection comprises vehicle-mounted GPS devices, a central data server, a special signal lamp control system, speed indication boards and trigger areas. After tramcars enter the trigger areas, the signal timing of special signal lamps is calculated by the central data server according to the geographical positions of the tramcars and suggested running speeds on the speed indication boards, and is sent to a special signal lamp control server. The central data server renews the signal timing in real time till the tramcars are driven away from the trigger areas. The special signal lamp control server analyzes signal timing information after receiving the signal timing information sent by the central data server; if the signal timing information and the phase positions of transverse social traffic lights do not conflict, the tramcars are allowed to pass through the intersection, and signal timing instructions are sent to the special signal lamps; if the signal timing information and the phase positions of the transverse social traffic lights conflict, vehicles are released by the transverse social traffic lights or the time during which the vehicles are released by the transverse social traffic lights is shortened, and signal timing instructions are sent to the special signal lamps in a delayed mode.

Description

technical field [0001] The invention relates to a control system for priority release of trams passing through crossings, in particular to realize low-cost priority strategy control by adopting GPS positioning, wireless transmission and speed indication flags. Background technique [0002] Modern trams belong to ground rapid transit and run on the road together with social vehicles. There is inevitably a level intersection between its system and other lanes, and the tram will be affected and interfered by social signal lights when passing the intersection. From the perspective of bus priority in urban construction, technical measures are generally taken to ensure that the priority of trams is higher than that of social vehicles. [0003] There are generally two kinds of existing technical measures: one is that the tram car actively requests to control the intersection; [0004] The first one is the tram vehicle active control intersection scheme. It sends an active priori...

AI Technical Summary

Problems solved by technology

[0006] 1) It is necessary to increase equipment and bring about a substantial upgrade of existing intersection traffic signal equipment, and the cost is relatively high

[0007] 2) When the on-board priority request device fails to detect equipment, the priority control will fail, which may lead to the situation of waiting for the crossing all the time

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