Once a lift truck or other material handling equipment is equipped with a TruckStopTM unit, it cannot be activated until an operator presents an authorized user Driver Key to a dash mounted reader. The reader LED will change from red to green and the equipment will be enabled. At this point the driver can attempt to start the ignition. If the Driver Key is not allowed access, the reader will beep twice and record the activation attempt. A programming kit is required to authorize users and trucks.