Simulation results show that the new model can reproduce the three traffic phases: free flow, synchronized flow and moving jam. In addition, our new model can better describe the complexity of traffic evolution: (1) with initial homogeneous distribution and densities larger than k3, the traffic will evolve into multiple steady states, in which the numbers of wide moving jams are not invariable. Our simulation results are the same as the real traffic observed by Kerner. However, in the Tian model, there is only one wide moving jam in most simulation trials. (2) If started from homogeneous distribution, with the middle range of density, the wide moving jam will emerge stochastically. (3) With initial mega-jam distribution and the density close to k2, the initial mega-jam will disappear stochastically. (4) For the cases with multiple wide moving jams, the process is analyzed involving the generation of narrow moving jam due to the “pinch effect”, which leads to wide moving jam emergence.