非机动车流矢量场模型及其参数变化规律研究

交通流特性参数是交通规划与控制研究中的基本参数指标,但是,交通流特性参数通常由经验确定,准确性很难得到保证;针对非机动车行驶总是向阻碍最小,空间最大的方向移动的特点,对矢量场微观模型进行了改进,将非机动车沿道路方向和垂直道路方向的运动分开建模,然后用改进后的模型对路段、路口进行微观仿真,并利用仿真得到的统计数据分析交通流特性参数,得到交通流特性参数与非机动车驾驶行为参数之间的定性定量关系,与实测数据吻合良好;根据该关系,可以在交通仿真和交通规划的研究中,对模型参数进行实时校正,使仿真和规划结果更加准确.

Vector Field Model and Studies of Non-motorized Traffic Flow Parameters

The traffic flow parameters are of great importance in the study of transport planning.But the experientially obtained parameters can hardly ensure the model's accuracy.The improved vector field model describes the behavior of bicycles in two vertical directions separately considering that bicycles always move towards the direction of maximum space and minimum resistance. Then microscopic simulation based on the improved model was performed in lanes and intersections.The statistic data obtained from the simulation were analyzed to get qualitative and quantitative relations between the traffic flow parameters and bicycle driving behavior parameters,which shows good fitness verifying with the real data.According to these relations,the parameters of the microscopic model can be adjusted online in the process of traffic simulation and transport planning,making the optimization results more accurate.