Congestion and phase transitions of heterogeneous continuum model with large trucks mixed with conventional vehicles and ACC vehicles.

It is common that there are large trucks mixed in the road, and the traffic situation has become more complicated. Moreover, the existence of large trucks and adaptive cruise control (ACC) vehicles will affect the traffic speed in mixed traffic. Based on the hybrid vehicles including ACC vehicles and conventional vehicles, we in this paper establish a heterogeneous continuum model with large trucks. The stability conditions and KdV-Burgers equation of heterogeneous vehicle groups with large trucks are derived. Through the numerical simulation of the evolution of heterogeneous car groups, it is known that the congestion of traffic system will be obviously restrained owing to increasing the proportion of large trucks and reducing the optimization speed of car groups in the road. In addition, due to the higher permeability of ACC vehicles, the traffic system becomes more steady, implying that ACC vehicles also promote the improvement of the transportation system. [ABSTRACT FROM AUTHOR]