To evaluate dynamic route selection methods, we developed a traffic flow simulator that uses cellular automata in a non-equilibrium environment where traffic congestion occurs frequently. The simulator uses the S standard map of the Navigation System Researchers' Association, which is the map used in actual car navigation devices, and produces environments where spontaneous traffic congestion occurs. The traffic flow model we propose is based on Nagel and Rasmussen's (1994) multiple-velocities model. Additionally, we propose an intersection model and a lane change model. We confirmed that our simulator works effectively for real road maps.