基于Synchro系统的典型信号交叉口配时优化研究

Timing Optimization and Simulation on Signalized Intersection by Synchro

首先分析了Synchro仿真系统中信号配时优化模型、用于延误计算的百分比延误方法(PDM)模型和服务水平模型,并在调查实际数据的基础上对典型十字型交叉口的当前信号配时方案进行优化研究,同时提出将改善几何条件和信号配时优化相结合的研究方案.案例给出的交叉口经过几何条件改善和信号配时优化后,最大车流量和通过能力比由1.53减小到1.04,平均控制延误由98.7s减少到37.1s,服务水平由F提高到D.

This paper analyzes the timing optimization model, PDM percentile delay method and LOS(level of service) model in Synchro software system. Through the analysis about timing optimization on a signalized intersection, especially about dissatisfied timing optimization, this paper proposes a timing optimization method in combination with the improving intersection design. The simulation results for improving intersection design and timing optimization show that the maximum v/c ratio may decrease from 1.53 to 1.04, the average control delay may decrease from 98.7 seconds to 37.1 seconds and the LOS may be improved from Level F to D.