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A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally used by emergency vehicles and other authorized vehicles in a variety of colors. Emergency vehicle lighting refers to any of several visual warning devices, which may be known as lightbars or beacons, fitted to a vehicle and used when the driver wishes to convey ...
In some states where police vehicles are decommissioned, the department reserves the right to include the spotlight defined as emergency vehicle lighting; in the State of Texas since September 1, 2015 decommissioned police vehicles are sold without the A-pillar spotlight regardless of the lens color (white, or red/blue).
Emergency vehicles such as fire engines, ambulances, police cars, tow trucks, construction vehicles, and snow-removal vehicles carry beacon lights. The color of the lamps varies by jurisdiction; typical colors are blue and/or red for police, fire, and medical-emergency vehicles; amber for hazards (slow-moving vehicles, wide loads, tow trucks ...
The emergency stop signal is automatically activated if the vehicle speed is greater than 50 km/h (31 mph) and the emergency braking logic defined by regulation No. 13 (heavy vehicles), 13H (light vehicles), or 78 (motorcycles) is activated; the ESS may be displayed when a light vehicle's deceleration is greater than 6 m/s 2 (20 ft/s 2) or a ...
The use of flashing lights and sirens is colloquially known as blues and twos, which refers to the blue lights and the two-tone siren once commonplace (although most sirens now use a range of tones). In the UK, only blue lights are used to denote emergency vehicles (although other colours may be used as sidelights, stop indicators, etc.).
A Volvo pump truck from South Australian Fire with red-and-yellow Battenburg markings. Battenburg markings or Battenberg markings [a] are a pattern of high-visibility markings developed in the United Kingdom in the 1990s and currently seen on many types of emergency service vehicles in the UK, Crown dependencies, British Overseas Territories and several other European countries including the ...