驾驶员敏感行为对入匝道口车流量的影响

Influence of Driver Sensitive Behavior on Traffic Capacity of On-Ramp System

在交通流优化的研究中,为了解决驾驶员的敏感行为因素对入匝道口的车流量影响的问题,利用入匝道系统模型在开放边界条件下,采用元胞自动机方法得到驾驶员敏感行为因素引入与否的入匝道口处的车流量数据,得到了不同车辆运行方式条件下入匝道系统各路段的交通流图。结果表明,引入驾驶员敏感行为因素能够显著提高主干道上的车流量;当主干道上车辆较少而匝道上车辆较多时,引入驾驶员敏感行为因素能够显著提高匝道路段的车流量。当主干道和匝道上车辆均较多时,匝道上车辆的随机减速过程更为频繁,从而导致匝道路段流量降低,而驾驶员的敏感驾驶行为在一定程度上能够减少道路瓶颈处堵塞情况的发生。

To solve the problem that driver＇s sensitive behavior influences on-ramp system, cellular automaton method was employed to investigate the effect of driver＇s sensitive behavior on on-ramp system based on sensitive driving model in the open boundary conditions. The basic diagrams of traffic flow on each section of the on-ramp system were obtained under different traffic rules. The results show that the factor of driver sensitive behavior can significantly improve of traffic on the main lane. When the main lane has fewer vehicles and on the contrary in the ramp system, the model of driver sensitive behavior can obviously increase the traffic capacity of ramp section. When main lane and the ramp system have more vehicles, ramdom deceleration process of vehicles on the ramp system becomes more frequent leading to the decrease of traffic capacity on the ramp system. The driver sensitive behavior can ease congestion situation to a certain extent at the road bottleneck point.