信号灯交叉口处综合待行区的建模与模拟

采用多车道元胞自动机模型研究综合待行区的孤立信号灯交叉口系统，分析待行区长度和信号灯周期对道路通行能力的影响.结果表明，综合待行区的合理设置在进口流量较大时能明显提高道路通行能力，减少交叉口停车时间，但同时也会增加停车次数.对于一定的信号周期，存在一个临界待行区长度.当待行区长度小于临界长度时，通行能力随待行区长度的增加而增大；但超过临界长度时，通行能力逐渐减小.

Modeling and Simulation of Versatile Waiting-Area at Isolated Signalized Intersection

A multilane cellular automaton model is proposed in investigating an isolated signalized intersection system with a versatile waiting-area. The effects of the length of waiting-area and the cycle time on the traffic capacity are analyzed. Numerical results show that proper setting of the versatile waiting-area can improve the traffic capacity significantly in the case of large inflow of vehicles. Both stop time and travel time at the intersection are reduced while the stop frequency is increased accordingly. For a given cycle time, a critical length of waiting-area exists. Below the critical value, the capacity increases with the length of waiting-area. When the length of waiting-area is larger than the critical value, the capacity decreases.