New Cellular Automaton Traffic Model with Mixed Traffic Flow

Mixed traffic flow is the basic characteristic of traffic flows of highways in China.But most theories and models about traffic flow were based on small cars.Cellular automaton(CA)model may mimic small-car flow accurately.A new traffic CA model with mixed traffic flow was proposed,which limits maximal velocities to different vehicle's types and advises that they occupy different number of cells at every time step.Some simulations were carried out and the results show that there are different in vehicle moving status,especially in vehicular velocity,between mixed traffic flow,small-car flow and non-mixed traffic flow by linearly transferring mixed traffic flow into small-car flow.And only if one large vehicle was in traffic flow,the velocity of the whole traffic flow would be greatly impacted,but under low density of traffic flow,the mixed ratio of traffic flow has slight influence on its velocity,while average velocity of traffic flow is slower than large-vehicle's maximal velocity.This model also makes a platform for studying mixed traffic flow in detail for the future.