考虑车辆异质性的堵塞交通流模型研究

On Congestion Traffic Flow Model Considering Vehicle Heterogeneity

为研究交通事故对高速公路交通流的影响,以双车道安全距离元胞自动机模型为基础引入强行变道规则,建立了考虑车辆异质性的高速公路车辆堵塞模型。利用MATLAB数值模拟高速公路异质交通流,分析不同交通密度情况下的交通事故持续时间以及重载货车占比对高速公路堵塞交通流的影响。研究表明:交通事故持续时间及重载货车占比均对高速公路堵塞交通流具有显著影响;当车辆密度大于4veh/km小于80veh/km时,交通事故持续时间对交通流有着显著影响,且持续时间越长对交通流的影响越大;当车辆密度小于30veh/km时,重载货车占比对交通流有着显著的影响,并且占比越大对交通流影响越大。

In order to study the impact of traffic accidents on expressway traffic flow,a forced lane change rule was introduced based on the two-lane safe distance cellular automaton model,and a highway vehicle congestion model considering the heterogeneity of vehicles was established.The heterogeneous traffic flow on expressways was used by MATLAB numerical simulation,the impact of the duration of traffic accidents and the proportion of heavy trucks under different traffic densities on expressway congestion traffic flow was analyzed.Research shows that the duration of traffic accidents and the proportion of heavy trucks have a significant impact on the traffic flow of highway congestion;when the vehicle density is greater than 4veh/km and less than 80veh/km,the duration of the traffic accident has a significant impact on traffic flow.And the longer the duration,the greater the impact influences on the traffic flow;when the vehicle density is less than 30veh/km,the proportion of heavy trucks has a significant impact on the traffic flow,and the larger the proportion,the greater the impact influences on the traffic flow.