关键词: 区域交通, 交通信号配时, 智能交通灯, 克隆选择算法

Abstract:

To improve the traffic efficiency of urban regional road network, this paper proposes a real-time timing method for regional traffic lights based on improved immune clonal selection algorithm. This timing method takes minimizing the total number of detained vehicles in the regional road network as the optimization objective, and converts the problem of traffic light state setting into the problem of clonal selection algorithm to search for the optimal solution, and dynamically searches the traffic light timing scheme with the highest capacity of regional road network according to the real-time traffic flow per unit time. In order to improve the convergence performance of clonal selection algorithm, a double-layer dynamic mutation operator is proposed, and the clonal suppression operator and population refresh operator are improved. Taking a regional road network in Xi’an as an example, the simulation results show that the total number of detained vehicles in the regional road network is 38.93% less than the fixed timing, and 20.33% less than the timing method based on standard genetic algorithm.

Key words: regional traffic, traffic signal timing, intelligent traffic light, clonal selection algorithm