Abstract
The number of accidents of mobility scooters is increasing. The mechanism of decelerating the speed of a mobility scooter is developed using the laser range finder. When the laser range finder notices barriers on direction of travel, deceleration is made automatically. The main purpose of this paper is to examine the improvement of maneuverability of mobility scooter by automatic deceleration. As the result automatic deceleration can be improved driving performance without worsening convenience. That shows the automatic deceleration can improve the safety and the operativity of a mobility scooter. And automatic deceleration can support driving of unaccustomed drivers.