A Map-Based Traffic Signal Control Scheme Generation Method

Abstract

The invention relates to a map-based traffic signal control scheme generating method. A traffic signal control scheme generated by using the method is composed of at least one NEMA (National Electrical Manufacturers Association) loop, wherein each of the NEMA loop is corresponding to the control phase of one entrance channel group. The method specifically includes the following steps that: 1) whether a current environment is a networked car environment is judged, and if the current environment is the networked car environment, a current time point is cyclically tested, and when testing achieves a set duration before a period terminal time point, step 2) is executed, otherwise, step 2) to step 4) are executed sequentially; 2) the entrance channel groups are made to be in one-to-one correspondence with the NEMA loops according to map information; 3) when the Webster signal timing method and a collision avoidance mechanism are adopted to perform signal timing, the loop length, half-loop length and phase length of the NEMA loops are obtained; and 4) a traffic signal control scheme is generated and is sent out. Compared with the prior art, the method of the present invention has the advantages of high universality and high real-time performance.

Description

technical field [0001] The invention relates to the technical field of signal-controlled intersection control under the Internet of Vehicles environment, in particular to a method for generating a map-based traffic signal control scheme. Background technique [0002] At present, traffic congestion is still a common problem in major cities, and the main node of traffic congestion is signal-controlled intersections. From 1868, when the world's first traffic lights were installed in the WestMinster area of ​​London, England, which opened the prelude to traffic control at urban intersections, to today's adaptive urban traffic control systems such as SCOOT and SCATS, which are quite complete in technology and functions, are used all over the world. The development of urban traffic control system has gone through three eras. From offline timing optimization software to online real-time adaptive control system; from single motor vehicle traffic control to complex traffic object co...

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Problems solved by technology

[0003] At present, the control methods adopted for the control of signalized intersections are almost all calculated based on the Webster method (mostly the Shanghai method in China), but there is a problem with this method that different structures need to be designed for intersections with different The timing structure, therefore, the signal-controlled intersection scheme must be designed by professionals, and the subsequent adjustments are more about the adjustment of the duration of the timing itself than the adjustment of the structure. A method for establishing a signal control scheme structure that can be updated in real time at intersections with various shapes and states

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