Abstract: A removable plastic automobile boss has a body formed with a bore for receiving a threaded fastener. A flat seating flange is formed on the front portion of the body, the flange including left and right ears respectively protruding outwardly from the left and right sides of the body. Top and bottom ramp-shaped engagement abutments are formed on the body. Further, a slit is formed on the body such that the top and bottom engagement abutments ride against the periphery of an instrument panel receptacle when the boss is advanced into the receptacle, thereby causing the top and bottom halves to be urged toward each other to permit the boss to be fully inserted into the receptacle. The front portion snappingly resumes an engaged configuration when the engagement abutments clear the periphery to sandwich the periphery between the engagement abutments and the seating flange to engage the boss with the instrument panel.

Abstract: A monitor system detects and disables a vehicle driving the wrong way on a one-way road or traffic lane. An alarm warns the driver of the unsafe condition and operation of the vehicle four-way flasher warns other motorists. The system includes a light transmitter and receiver, and controls to disable the vehicle and operate the alarm and four-way flasher. Light is transmitted forward, where it may strike a reflector mounted on a post or other structure associated with the road or lane being monitored. Upon detecting reflected light, the system operates. The system is reset after operation by using the ignition switch to start the engine. Selection of reverse gear overrides the system, permitting a vehicle to back away from a directionally restricted road or traffic lane.