混有网联车辆的交通流稳定性和最大服务流率分析

Analysis on Stability and Maximum Service Flow Rate for Mixed Traffic Flow with Connected Vehicles

针对传统车辆和网联人工驾驶车辆组成的混合交通流,分析不同网联车辆市场占有率对稳定性和最大服务流率的影响。基于传统车辆与网联车辆的跟驰特性,建立混合交通流稳定性分析的一般方法;基于HCM2010宏观交通流分析方法,获得不同网联车辆市场占有率下的最大服务流率。结果表明:市场占有率的增加有利于提高混合交通流的稳定性与最大服务流率;当占有率大于0.51时,混合交通流可在任意平衡态速度下稳定,在高密度、低稳态速度下的稳定性提高更加显著;相比传统交通流,网联车辆交通流的通行能力可提高63.64%;当占有率大于0.5时,混合交通流最大服务流率提升更快,且占有率越高,提高幅度越大。

This paper analyzed the stability of traffic flow mixed with connected manual vehicles,and the impact of different connected vehicle market penetration rate on maximum service flow rate. Based on the car-following characteristics,the car-following models of the connected vehicle and the regular vehicle were established and the general method of the stability analysis of the mixed traffic flow was proposed. Based on the macroscopic methodology of HCM2010,the maximum service flow rate under different market penetration rate was obtained.The results show that connected vehicles can improve the stability and the maximum service flow rate of traffic flow.The mixed traffic flow will be stable at any equilibrium speed if the connected vehicle market penetration rate is greater than 0.51.Moreover,a connected vehicle is more significant for the improvement of traffic flow stability at high density or low equilibrium speed. Besides,compared with the traffic capacity of regular vehicles,it can be promoted by 63.64% when the traffic flow is consisted of connected vehicles.The improvement of the maximum service flow rate of mixed traffic flow is more obvious,when the connected vehicle market penetration rate greater than about 0.5.In addition,when the connected vehicle market penetration rate is higher,the increase is greater.