Research in the development of assistive devices (power brakes, power steering, automatic transmission, etc.) is geared to close the gap between the handicapped and the normal operator. This objective is accomplished by providing additional assistive devices that will not interfere with the normal operation of the vehicle, but will enable the disabled individual safely to operate the same vehicle. This is achieved by considering the anthropometric and biomechanical constraints of the impaired driver. The pistol-grip controller is discussed in detail. It is intended to control manipulation of the steering wheel, brakes, lights, horn, windshield wiper, windows, etc.