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2. Car alarm - Wikipedia

   en.wikipedia.org/wiki/Car_alarm

   A car alarm is an electronic device installed in a vehicle in an attempt to discourage theft of the vehicle itself, its contents, or both. Car alarms work by emitting high-volume sound (often a vehicle-mounted siren, klaxon , pre-recorded verbal warning, the vehicle's own horn, or a combination of these) when the conditions necessary for ...

3. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

4. Parking sensor - Wikipedia

   en.wikipedia.org/wiki/Parking_sensor

   The electromagnetic parking sensor (EPS) was re-invented and patented in 1992 by Mauro Del Signore. [2] Electromagnetic sensors rely on the vehicle moving slowly and smoothly towards the object to be avoided. Once an obstacle is detected, the sensor continues to signal the presence of the obstacle even if the vehicle momentarily stops.

5. Back-up beeper - Wikipedia

   en.wikipedia.org/wiki/Back-up_beeper

   Back-up beepers or an observer are required by OSHA for earth-moving vehicles with an obstructed view to the rear and no one on the ground to help guide the driver. [9] OSHA regulation 29 CFR Part 1926.601(b)(4) requires "a reverse signal alarm audible above surrounding noise level", but only when the motor vehicle has "an obstructed view to the rear".

6. Blind spot monitor - Wikipedia

   en.wikipedia.org/wiki/Blind_spot_monitor

   Optical blind spot detector on side mirrors. The blind spot monitor or blind-spot monitoring is a vehicle-based sensor device that detects other vehicles located to the driver’s side and rear. Warnings can be visual, audible, vibrating, or tactile. [1] [2] Blind spot monitors may do more than monitor the sides and rear of the vehicle. They ...

7. Advanced driver-assistance system - Wikipedia

   en.wikipedia.org/wiki/Advanced_driver-assistance...

   If the vehicle detects a possible obstacle, it will notify the driver and if no action is taken, the vehicle may react to the obstacle. Electric vehicle warning sounds notify pedestrians and cyclists that a hybrid or plug-in electric vehicle is nearby, typically delivered through a noise, such as a beep or horn. [19]