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In California, all emergency vehicles just use red warning lights, with 1 steady red warning light facing forward. Blue lights may only be used on vehicles operated by Peace Officers, as defined under California Penal Code 830.1 to 830.38. (California Vehicle Code 25258(b)) -Commonly referred to as "California Standard".
Conspicuity devices are lights and reflectors that make a vehicle conspicuous and visible with respect to its presence, position, direction of travel, change in direction, or deceleration. Such lights may light steadily, blink, or flash, depending on their intended and regulated function.
Tell-tale (automotive) A group of tell-tales showing lights for "brake fluid", "stop lamp" and "check engine". Graphical tell-tales. A tell-tale, sometimes called an idiot light[ 1] or warning light, is an indicator of malfunction or operation of a system, indicated by a binary (on/off) illuminated light, symbol or text legend.
When an emergency vehicle is responding, it often uses audio warning devices in addition to the visual warnings provided by its warning lights. Audio warning devices are turned off once the vehicle is on-scene. Such devices include: Sirens - These can be fully electronic, electric, or manual, but are all designed to create changing sound ...
A check engine light or malfunction indicator lamp ( MIL ), is a tell-tale that a computerized engine-management system used to indicate a malfunction or problem with the vehicle ranging from minor (such as a loose gas cap) to serious (worn spark plugs, engine problems or a faulty oil valve, etc.). Found on the instrument panel of most ...
Courtesy lights are used to request right-of-way primarily by volunteer or on-call firefighters, emergency medical technicians (EMTs), and other first responders to expedite their response in their privately owned vehicles to their firehouse, base, or directly to the scene of an emergency call. Courtesy lights sometimes allow the user to ...
Traffic signal preemption (also called traffic signal prioritisation) is a system that allows an operator to override the normal operation of traffic lights.The most common use of these systems manipulates traffic signals in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way, thereby reducing response times and enhancing traffic safety.
Aviation obstruction lighting. Emley Moor transmitting station using a red warning beacon. Aviation obstruction lighting is used to enhance the visibility of structures or fixed obstacles which may conflict with the safe navigation of aircraft. Obstruction lighting is commonly installed on towers, buildings, and even fences located in areas ...
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