Intersection signal control method considering priority of multiple buses

Abstract

The invention discloses an intersection signal control method considering the priority of multiple buses. According to an intersection which the multiple buses probably pass by, a multi-objective planning model is established through the functional relationship between green time displayed at all phases, average delay of the buses, the phase time change amount and the lane saturability, and an exhaustion method is used for solving to obtain an optimal signal control scheme for the intersection in each period. According to the intersection signal control method, minimum average delay of the buses is considered, and meanwhile changes of original signals and influences on other lanes can be reduced; as a result, priority control over the buses and normal operation of the intersection are guaranteed, the bus travel time can be shortened for passengers, the attraction of a bus trip to citizens can be promoted, and urban traffic congestion can be relieved.

Description

Technical field [0001] The invention relates to the technical field of intersection control, and in particular to an intersection signal control method that considers the priority of multiple buses. Background technique [0002] Vigorously developing urban public transportation is an effective measure to alleviate the current urban traffic congestion and environmental pollution problems in China. In order to increase the attractiveness of public transportation to travelers, on the one hand, measures such as reducing fares and improving bus comfort can be adopted; on the other hand, reducing the time spent on public transportation is also a way to increase the public transportation share rate. According to the survey, during bus driving, parking delays at intersections accounted for about 50% of the total bus delays, which is equivalent to delays at stops. Therefore, considering the priority of public transportation vehicles in intersection control can effectively reduce the tota...

AI Technical Summary

Problems solved by technology

However, it is very rare in ordinary lanes that there are no vehicles queuing in front of the stop line, so the above method is only applicable to the case where there is a bus-only lane at the intersection entrance, and there are almost no buses queuing at the entrance

[0005] 2. The above control method only proposes a pre-sensing signal priority control for a bus vehicle on a BRT line at the intersection, but in the real environment, there are multiple buses of different lines passing from different directions in the same signal period at an intersection Intersections are very common, and it may even happen that two buses pass through the intersection successively on the same route in the same cycle

If the length of the signal cycle is not expanded according to the situation of social vehicles, it may lead to the situation that the vehicle in a certain entrance has been emptied, but the phase is still green, thus forming a waste of green light time and greatly increasing the delay of vehicles in other entrances; on the contrary Compressing the signal cycle may cause the green light time of a certain signal phase to fail to meet the needs of vehicles, and the saturation of the lane exceeds the limit, causing more and more vehicles to accumulate at the entrance

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