On the Phase Transition by go—and—stop cars in NS model

In this paper,the problem of phase transition in NS traffic model is studied.The ratio of go—and—stop cars to all cars is defined,and the character of phase transition from free flow to jammed flow is studies through computer simulation.Compared with the ratio of closer cars to all cars,the ratio of go—and—stop cars to all cars is more appropriate to describe the phase transition.