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以城市路外停车出入口影响区作为研究对象,将拟停放车辆从最右侧车道右转驶离主路进入停车场的过程对于上游运行车辆的影响区长度表述为停放车辆减速进入停车场距离和跟驰运行车辆的交通波传播距离2个部分。通过理论分析并结合调查数据建立了基于不同驶入时间及不同饱和度下影响区动态长度的计算模型,确定了停车影响时间、速度变化系数等主要参数的适用条件。通过实例并采用VISSIM5.3软件对模型进行了仿真对比验证,主要结论有:(1)当驶入时间在4~8 s时,饱和度与影响区长度呈现反比关系;驶入时间大于8 s时,饱和度与影响区长度呈现正比关系;(2)当饱和度在[0.46~0.5]驶入时间在4~15 s时车辆驶入对主路上游车辆没有影响;(3)当饱和度大于0.6,驶入时间大于9 s时,车辆驶入对主路上游车辆的影响长度增幅明显。
Taking the influence area of the urban off-street parking entrances and exits as the research object, the length of influence zone of the parked vehicles decelerating into the parking lot and the length of the affected area of the upstream moving vehicles during the process of turning parked vehicles right from the right lane and leaving the main road into the parking lot Car traffic wave following the running vehicle is spread in two parts. Based on the theoretical analysis and the survey data, a calculation model based on the dynamic length of the affected area under different arrival times and different saturations is established, and the applicable conditions of the main parameters such as parking influence time and speed variation coefficient are determined. Through the example and VISSIM5.3 software simulation comparison of the model, the main conclusions are: (1) When the entry time is 4 ~ 8 s, the saturation is inversely proportional to the length of the impact area; the entry time is greater than 8 s (2) When the saturation time is between 4 and 15 s with [0.46 ~ 0.5] entry time, the vehicle enters the vehicle with no effect on the vehicles on the main road; (3) When the saturation Greater than 0.6, when entering time is greater than 9 s, the influence of vehicle entering on the vehicles on the main road increases obviously.