基于车间通信的换道策略研究

针对道路交通系统中换道行为产生的干扰作用，提出了基于车间通信的两阶段车辆换道策略。基于NGSIM数据对普通车辆换道行为进行分析，建立两阶段换道模型。模型第一阶段考虑影响换道的六个影响因素，构建二元Logit模型，估计车辆换道概率；第二阶段利用安全条件确定车辆换道行为是否实施。对于互联车，在换道模型第一阶段考虑更加精确的实时交通状态信息，设计了对应的换道策略。通过数值模拟，分析不同换道策略对交通流的影响。结果表明，基于车间通信的换道模型考虑了本道和目标车道更多车辆的速度及位置信息，效用函数使得车辆的换道行为考虑了更大范围内平均车速和平均车距的因素，而不仅仅局限于最近邻范围内交通状态的局部效用，从而抑制了换道的频率及其产生的干扰，增加了道路交通系统的通行效率。

Lane-changing strategy based on inter-vehicle communication

A considerable interference is associated with the lane-changing behavior in a traffic system that can significantly restrict the smooth and efficient operation of the traffic system.Therefore,a two-stage vehicle lane-changing model is developed based on inter-vehicle communication to solve this issue.Herein,the lane-changing behavior of vehicles in real-time traffic is analyzed based on the NGSIM data,and the two-stage vehicle lane-changing model is presented.The first stage of the model considers six factors that affect the lane-changing behavior,and a binary logit model is considered to estimate the lane-changing probability;the second stage uses safety conditions to determine whether the vehicle lane-changing model is implemented.Further,accurate real-time traffic status information is obtained from the first stage of the vehicle lane-changing model for the connected vehicles,and a corresponding lane-changing strategy is developed.The effects of different lane-changing strategies on the traffic flow are analyzed using numerical simulations.The results denote that the lane-changing model based on inter-vehicle communication considers the speed and position information of a large number of vehicles in the current and target lanes.The utility function causes the vehicle’s lane-changing behavior to consider the average speed and average distance in an extensive range and is not limited to the local utility of the traffic conditions in the nearest neighbors.Therefore,the lane-changing strategy based on inter-vehicle communication considerably inhibits the frequency of the lane-changing behaviors and the generated interference,promoting the efficiency of the road transportation systems.