基于交通仿真的单向平面分流路网研究

为解决机非混行造成的交通低效问题,构建单向平面分流路网,即以机动车干路单向交通组织为基础,以机动车支路和自行车、公交专用路双向交通组织为辅助的公交专用、机非分离的路网模式。首先,采用VISUM,VISSIM模型,对单向平面分流路网与传统混合路网的路网特性、交通运输效率进行分析,结果表明,分流路网在交通绕行、转向比例方面与传统混合路网基本一致。其次,在对两套路网体系进行优化设计的基础上,通过仿真分析,得出单向平面分流路网的运输效率远高于传统混合路网。最后指出,将干路单向化处理,发挥单向道路的横向可穿越特性,辅以减少干路绕行的支路体系,是单向平面分流路网实现高效运行的关键。

Study of One-way Road Network based on Traffic Simulation

To solve the low capability problem caused by the mixed traffic of motor vehicles and bicycles, a one-way road network is proposed, which sepa- rates bus, bicycle, and motor vehicle traffic and allow two-way flows for bike and bus on exclusive lanes, The proposed network is evaluated by VISUM and V1SSIM models. Specifically, the models simulate the characteristics of one-way diversion road network and traditional road network and compare the transportation efficiency between the two networks. The simulation re- sults show that the new road network has generally the same traffic detour volume and turning ratio compared with the traditional road network. The de- sign optimization of both roadway network shows that the transportation effi- ciency of new road network is much higher than that of conventional mixed traffic road network. Finally, this paper indicates that the key point to achieve the high-efficiency operation of one-way diversion road network is to sepa- rate bus, bicycle, and motor vehicle on arterial road, which enhances the capa- bility for through traffic of one-way road, and at the same time reduces the traffic detour on minor road system.