A Signal Control Method for Serving Vehicle Priority Passing

Abstract

The invention discloses a signal control method serving priority traffic of vehicles, aiming at improving the utilization rate of green lights as an optimization goal, sensing the priority demand of vehicles at intersections according to real-time positioning data of vehicles, and operating according to the real-time flow rate and queuing length of each flow direction at the intersection. Dynamically analyze the matching degree between the timing plan and traffic demand, improve the green hour utilization rate of non-priority flow without changing the cycle and phase sequence, and maximize the extension of the priority vehicle traffic phase to ensure that special vehicles reduce queuing time, Passing through the intersection with priority effectively reduces the impact of special vehicle priority on the normal traffic of social vehicles. At the same time, in order to overcome the impact of program mutations in the existing priority method on social vehicle traffic, by predicting the arrival time of special vehicles at intersections, two periods in advance Fine-tuning the timing to ease the transition of the intersection signal scheme can effectively improve the robustness of the priority control of the intersection signal machine, and reduce the implementation cost of the special priority control.

Description

technical field [0001] The invention relates to the technical field of road traffic control, in particular to a signal control method serving for priority passage of vehicles. Background technique [0002] Traffic signal priority is a special traffic control method for scenarios such as public transportation, emergency rescue, and special missions. It cooperates with conventional traffic signal control to build a traffic control service system for complex traffic scenarios on urban roads. The current priority control is generally divided into bus priority and emergency / special service priority according to the priority vehicle type. Mainstream bus priority control methods include reconstruction of bus-only lanes / priority lanes, layout of bus-specific signal lights, installation of bus radio frequency chips and roadside detection equipment and other infrastructure, equipment deployment, real-time positioning of buses to trigger phase switching and locking of signal machines ...

AI Technical Summary

Problems solved by technology

[0007] Therefore, the current common signal priority control methods mostly use control methods such as green light extension, red light early break, and phase insertion, etc., to meet the priority needs of specific vehicles as the primary goal. There may be cycle extension, phase sequence, etc. Sudden program changes, such as adjustments and sudden reductions in the release time of other flows, have a direct impact on the traffic of other social vehicles. Therefore, it is always difficult to coordinate in the two aspects of absolute signal priority control and reduction of traffic interference to social vehicles. contradiction

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