In the sustainable ITS project at the Center for Collaborative Research, the University of Tokyo, an experiment platform is developed for drivers' characteristics analysis on the moving-based driving simulator. In the upper-level microscopic car traffic flow simulator, a prototype driver model and vehicle dynamics model are developed with flexibility in the upgrading process. For realistic human factor measurement experiments, our driving simulator is equipped with a frame-structured flexible cut-body cabin, 360 degrees-field-of-view omni directional projection type visual display system, a steering wheel with an AC servo motor, 6.1ch surround audio system and 6 DOF motion system with turning table. Some measurement experiments are made on a highway with a real car, aimed at driving simulator validation. Understanding of individual driver's behavior on this platform will contribute to design of safe and comfortable driving environments.