基于元胞自动机的驾驶风格对T型交叉口车流量影响

Influence of driving style on traffic flow at T-intersection based on cellular automata

无信号灯T型交叉口左转车流量直接影响道路出行状况,分析驾驶风格对T型交叉口车流量影响,有效解决交叉口交通设施规划不合理的问题。基于元胞自动机构建无信号灯T型交叉口模型,分析保守型、稳定型、冒险型3类驾驶风格对T型交叉口车流量影响。结果表明:保守型驾驶交叉口无车辆冲突,同时伴随着车流量的增大,冒险型驾驶会导致交叉口出现更多的车辆冲突;保守型驾驶交叉口车辆均延误更大,当左转车流量在80辆/h以下时,稳重型驾驶车辆均延误稍低于冒险型驾驶,当左转车流量在80辆/h以上时,冒险型驾驶车辆均延误明显低于稳重型驾驶,这对T型交叉口交通设施规划具有一定的参考价值。

The left turn traffic flow at the T intersection without signal directly affects the road travel status.Analyze the impact of driving style on the traffic flow at the T intersection,and effectively solve the problem of unreasonable traffic facility planning at the intersection.Based on the cellular automatic mechanism,a T-intersection model without signal lights is built to analyze the impact of conservative,stable and adventurous driving styles on the traffic flow at T-intersections.The results show that there is no vehicle conflict at conservative driving intersections,and with the increase of traffic flow,risky driving will lead to more vehicle conflicts at intersections;the delay of vehicles at conservative driving intersections is greater.When the left turn traffic flow is below 80 vehicles per hour,the delay of steady heavy driving vehicles is slightly lower than that of adventurous driving vehicles.When the left turn traffic flow is above 80 vehicles per hour,the delay of adventurous driving vehicles is significantly lower than that of steady heavy driving vehicles,which has certain reference value for the planning of traffic facilities at T-intersections.