考虑非机动车过街的移位左转交叉口延误建模

Construction of a delay evaluation model for displaced left-turn intersections considering non-motorized crossing modes

为了评价非常规交叉口非机动车过街的通行效率,以移位左转交叉口为研究对象,对多种非机动车过街方式进行分析。从人均延误的角度考虑,基于非机动车到达离散曲线特征,建立了传统过街、二次连续过街和混行相位一体化过街3种延误评价模型;应用VISSIM仿真验证了模型的有效性,并进行适用性分析,探究了机动车交通量、非机动车交通量与非机动车左转比例的参数敏感影响。结果表明:所建模型的人均延误计算值与延误仿真结果值的偏差为3%,在非机动车交通量和左转比例均较低条件下适用于传统过街,机非混行相位过街方式在高车流密度情境下改善效果更佳,而二次过街的非机动车延误整体偏大。

In order to evaluate the traffic efficiency of non-motorized vehicle crossing at unconventional intersections,a variety of non-motorized crossing methods were analyzed using displaced left-turn intersections as the research object.Considering from the perspective of per capita delay,based on the discrete curve characteristics of non-motorized vehicles,three delay evaluation models of traditional crossing,secondary continuous crossing and mixed phase integrated crossing were established.VISSIM simulation was applied to verify the validity of the model,and the applicability analysis was carried out to explore the parameter sensitivity of motor vehicle traffic volume,non-motor vehicle traffic volume and non-motor vehicle left-turn ratio.The results show that the deviation between the calculated per capita delay value and the delay simulation result value of the proposed model is 3%,which is applicable to the traditional crossing under the conditions of low non-motorized traffic volume and left-turn ratio,and the improvement effect of the mixed-phase machine-non-motorized crossing method is better under the high traffic density scenario,while the overall non-motorized delay of the secondary crossing is generally large.