Abstract: When the conflicts between the left-turn vehicles and the through vehicles have happened at the signalized intersection, we consider different driver behaviors and divide the drivers into two types: the following driver and the humility driver, and build a model of the left-turn vehicles going through the intersection. The impact on the intersection’s capacity by the different driver behavior is studied. The results show that when all the drivers are the following drivers, with the increase of the traffic flow, the capacity of the intersection decreases sharply. When all the drivers are the humility drivers, considering the situation that the policeman directs traffic, the capacity of the intersection will be better. These results can explain the reason for the blocking of the intersections at the heavy traffic time in China well. We can improve the capacity of the intersections by changing the driver behavior and by directing traffic by a policeman.

Key words: driver behavior, intersections, capacity

摘要： 考虑通过十字路口时左转车辆和直行车辆发生路权冲突时的不同驾驶者行为,将驾驶者分为跟随型驾驶者和谦让型驾驶者,并建立了左转车辆通过十字路口的模型,研究不同的驾驶者行为选择对十字路口通行能力的影响。结果表明,随着交通流量逐渐增加,驾驶者的行为越趋向于跟随时,十字路口的通行能力将会急剧降低;而当驾驶者的行为趋向于谦让时,十字路口的通行能力甚至优于有交警指挥的情形。该结果很好地解释了在行车高峰期中国十字路口堵塞的原因,即驾驶者的行为选择,可以通过改变驾驶者的行为选择和在交通流量达到一定的饱和度时派出交警来改善十字路口的通行能力。

关键词: 驾驶者行为, 十字路口, 通行能力