考虑机非混合的交叉口信号配时优化设计

Optimal Design of Intersection Signal Timing for Mixed Traffic of Motorized and Non-Motorized Vehicles

目前较多交通管控措施过分偏向机动车,使得非机动车的路权被严重挤压,进一步加剧路段及交叉口运行秩序混乱等问题.因此,本文主要考虑机动车与非机动车的交互行为,对交叉口信号配时优化设计进行了研究.通过对具有典型机非混合特点的广州市环镇西路-江石东路交叉口开展实地调查,并基于Webster方法对该交叉口进行信号配时优化设计,给出了优化后的设计方案;最后,运用Vissim交通仿真软件对优化前后的方案进行仿真对比分析.结果表明,优化方案可以使该交叉口的平均排队长度、车辆延误、排放物等指标均有不同程度的下降,证明了该方案能有效缓解该交叉口的拥堵程度.

Currently,many traffic control measures protect mainly the right of way of motorized vehicles,and that of non-motorized vehicles is severely squeezed,which has further aggravated traffic problems.Therefore,the optimal design of intersection signal timing is studied by mainly considering the interaction between motorized and non-motorized vehicles.A field investigation is carried out at the intersection of Huanzhen Xi Lu and Jiangshi Xi Lu in Guangzhou,a typical intersection with mixed traffice of motorized and non-motorized vehicles.The signal timing optimization for this intersection is proceeded by using Webster method.And the optimized design scheme is presented.Finally,the simulation by VISSIM is conducted to analyze the operation efficiency of the intersection before and after optimization.The results show that the optimized scheme can reduce the average queue length,vehicle delays and emissions at the intersection to varying degrees.It proves that the optimized scheme can effectively relieve congestion of this intersection.