Abstract
In order to evaluate obstacle avoidance performance of a vehicle, behavior was studied in steering maneuver, such as lane change. A vehicle with four wheel steering (4WS) was found to contribute to improvement of the vehicle transient response in steering maneuver on a dry road surface. On a slippery road surface, 4WS was also effective to improve vehicle maneuverability. Effect of traction force control to front and rear wheels on vehicle dynamics is also discussed. (A) For the covering abstract of the conference, see IRRD 837684.