An improved one-dimensional cellular automation model of traffic flow

At the condition of periodic boundary, motor vehicles traffic flow with different-maximum-speed vehicles mixed on one-way and single lane is the target of research. Based on NS models of traffic flow, the relative velocity among vehicles is taken into account. And the renewal rules of NS model are revised. It is mainly to raise the driving speed by correlating stochastic probability of speed-down with velocity. Mixed traffic flows with two-different-maximum-speed and three-different-maximum-speed are acted examples to be simulated. On the basic of the result of simulation, the velocity of mixed traffic flows is up to the velocity of slow vehicles. So for improving the velocity of high-speed roads, the limitation of the lowermost velocity is needed to be raised. The traffic capacity of high-speed roads also can be increased.