Public transport priority signal timing optimization method suitable for high saturation intersection

Abstract

The invention provides a public transport priority signal timing optimization method suitable for high saturation intersection. For the high-saturation intersection with public transport priority, after the green time extension strategy is adopted, signal timing is optimized, that is, green time extension is further adopted for each subsequent flow direction, queue length can be restored to zero in three cycles, delay increase of other non-priority vehicles caused by the green time extension strategy is reduced, for the signal timing optimization method, the minimum amount of delay increase istaken as the optimization goal, constraints such as the queue length, the number of cycles required to restore the queue length to zero, the minimum green time and dual-loop control are considered, and a model is established for optimization. The method is advantaged in that public transport signal priority can be provided under the condition of high intersection saturation, signal timing optimization is carried out, so the use scope of public transport signal priority is extended, and the method is conducive to promotion of public transport priority.

Description

technical field [0001] The invention relates to a signal timing optimization method, in particular suitable for a bus priority signal timing optimization method at high-saturation intersections, and belongs to the technical field of intelligent transportation. Background technique [0002] As urban traffic congestion becomes more and more serious, and the land that can be used for traffic becomes more and more scarce, traffic congestion needs to be alleviated by changing the way of travel. As a cost-effective mode of transportation, buses have been recommended by many governments and scholars. Providing high-quality bus services can attract more people to choose public transport, thereby reducing car usage and easing traffic congestion. As a way to improve the quality of bus service, bus signal priority has been studied by many scholars. [0003] At present, after adopting the green light extension strategy for buses, in order to alleviate the delay of other non-priority v...

AI Technical Summary

Problems solved by technology

However, the above methods for dealing with the increase in red light time are not good and are mainly suitable for low-saturation intersections, but not for high-saturation intersections where the queuing length needs multiple cycles to recover

At present, there is no optimization method for bus priority signal timing suitable for highly saturated intersections

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