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使用元胞自动机模型研究包含出入匝、主路和辅路的城市快速路系统的交通问题,为不同类型的路段定义了三种不同的换道规则.模拟结果表明,高入匝流量容易导致主路、匝道及其上游出现拥堵,高出匝流量容易使匝道出口车流与辅路内侧道车流发生冲突.入匝流量比较高时,主辅路为双车道的系统可以延缓交通拥堵和减少通行时间;当入匝流量较低时,双车道改善了单车道下辅路的通行状况.
The cellular automata model is used to study the traffic problems of urban expressway system with turn-off turns, main and auxiliary roads and three different lane changing rules are defined for different types of road sections.The simulation results show that high turn turns easily lead to Roads, ramps and their upstream congestion, the turn of the high turn-off easily ramp traffic and the road side of the road traffic conflict.When the turn turns the traffic is relatively high, the main road is a two-lane system can delay traffic congestion and reduce traffic time; When the turn-over rate is low, the double lane improves the traffic condition of the auxiliary road under single lane.