T型交叉口多速混合交通流特性研究

Study on Characteristics of Traffic Flow at T-Shaped Intersection with Mixed Different Maximum Speed Vehicles

为了解决T型交叉口系统中车辆拥堵的现象,结合实际的城市T型交叉口交通情况,提出了一种T型交叉口多种速度混合交通流的元胞自动机模型。模型中运行的车辆采用主干道车辆优先行驶的原则,避免车辆之间发生碰撞和死锁现象。仿真研究在开放边界条件下,将车辆以3种最大速度混合注入T型交叉口系统的车道,研究支道注入概率分别对T型交叉口中四条车道速度、密度、流量的影响。结果表明:在同等条件下,不同速度混合比例系数对系统交通流影响不同。支道注入概率在一定范围内影响T型交叉口系统交通流。

In order to solve the problem of traffic congestion phenomena at T - shaped intersection the system, in this paper, combined actual city T - shaped intersection traffic conditions, we proposed a cellular automaton model of mixed traffic flow at T - shaped intersection. In order to avoid a collision between vehicles and phenomenon of grid- lock, running vehicle in the model adopted the principle of major street vehicles traveling priority. Under the open boundary conditions, three kinds of maximum speeds of vehicles were mixed and poured into T - shaped intersection lane. The impacts of pouring probability of branch streets on the average velocity and traffic flow of T - shaped inter- section of four lanes were researched respectively. Under the same conditions, different mixing ratio coefficient of the speed has different effects on the traffic flow system. Branch street pouring probability affects T - shaped intersection traffic flow within a certain range.