A Mixed Traffic Flow Model Based on a Modified Cellular Automaton in Two-Lane System

Based on the basic symmetric two lane cellular automaton model (STCA), we propose a modified STCA (MSTCA) for mixed traffic flow. In MSTCA, the headway also could be used for lane changing, and then the length for safety criterion would be extended a lot. Lane changing region and first cell for lane changing on the other lane could be located. The situation while there are successive vehicles satisfies both the safety criterion and the motivation for lane changing; vehicles ahead would own lane changing priority. Both the two factors will influence the frequency of lane changing; eventually affect the total traffic flow. Simulation results show that the MSTCA could acquire higher value of flux and reproduce more realistic features of the mixed traffic flow.