考虑路边停车带影响的非机动车压缩交通波模型

Model of bicycle compression wave based on the effect caused by curb parking on bicycle lane

摘要:

为了解析设置于物理分隔非机动车道的路内停车带对于非机动车交通运行的影响,以非机动车集群通行和压缩特性为基础,基于流体力学中的气流分析理论,分别提出了描述机动车辆停放过程影响条件下的非机动车流减速-跟驰和停车的压缩系数计算方法,进而建立了非机动车压缩交通波模型．应用该模型,提出了非机动车流由于路内停车带设置引起的最不利时刻的排队长度计算方法,并以此为依据,建立了路内停车泊位与上游交叉口最短距离设置方法．以苏州市东中市路实测交通数据为基础,将压缩交通波模型与实际停车波速进行对比,发现相对误差的平均值为8.57％,而合理控制非机动车停车干扰的时间及非机动车流密度两个参数,可以有效降低排队自行车流延伸至上游交叉口,从而缓解交通拥堵和降低交通安全隐患．

Abstract:

To analyze the effect of bicycle flow caused by curb parking on segregated bicycle lane, this paper analyzed the group and compression characteristic of bicycle flow. Then based on airflow analysis method, we put forward the model of bicycle compression wave to describe the state of cycle deceleration-following and stop under the influence of parking process of vehicles. By means of the model, the maxim queuing position is calculated when the situation caused by curb parking is the worst. Furthermore, the shortest distance between curb-parking space and upper intersection is calculated. Based on the field data measured at Dongzhongshi Road in Suzhou city, comparing the calculated results with the real stop wave rate, the average value of relative error is less than 8.57％. By controlling the interference time of bicycle and density of bicycle flow, the phenomenon that queuing bicycles extend to upper intersection can be reduced effectively, so that the traffic congestion can be relieved and the traffic hidden danger can be reduced.