断面车路通讯环境下的恒速车流运行模型

Constant Speed Based Traffic Platoon Dispersion Model in CrossSectional Vehicle Infrastructure Communication Environment

摘要:

从流量角度，在假设车速恒定的基础上建立了车流运行模型，并以该模型预测和实际到达的流量分布之间的最大流量区间变异系数为评价指标，分析了路段上游数据收集断面位置、路段长度、交通流量和不同转向车流对预测效果的影响.与静态匀速模型的对比分析结果表明：数据收集断面位置和路段长度对模型的预测效果影响很小，且不同交通流量和转向车流情况下模型预测存在一定规律性.最后结合实际调查数据，证实了模型的有效性.

Abstract:

Assuming that the car’s speed is constant along the road segment, the traffic platoon dispersion model was developed from the perspective of flow. The parameter of peak range of variation coefficient of the predicted and actual arriving traffic flow distribution was chosen for model evaluation. Besides, the influence of data collector location, link segment length, traffic volume and flow direction on the predicted results was analyzed. Comparing with the static average speed model, the results show that the data collector location and the link segment length have a trivial effect on the prediction model. The trend of the model performance was summarized for different volume levels and different flow directions. It can be concluded that the proposed model is effective and available for predicting the distribution of traffic flow arriving at downstream intersection based on the simulation experiment and field investigation.