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  2. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Emergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users. A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally used by emergency vehicles and other authorized vehicles in a variety of ...

  3. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    In the United States, response codes are used to describe a mode of response for an emergency unit responding to a call. They generally vary but often have three basic tiers: Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with emergency lights, but without sirens. Alternatively, sirens may be used if necessary ...

  4. Kel-Lite - Wikipedia

    en.wikipedia.org/wiki/Kel-Lite

    Kel-Lite was the first heavy-duty aluminum bodied flashlight, which became popular with law enforcement agencies due to its heavy construction. They were designed to be carried in place of a police baton and also provide light. The eponymous company, founded by Donald Keller and Frank Patti in 1968, manufactured Kel-Lite flashlights in southern ...

  5. History of traffic lights - Wikipedia

    en.wikipedia.org/wiki/History_of_traffic_lights

    The history of traffic lights is associated with the historic growth of the automobile. [1] Traffic lights were first introduced in December 1868 on Parliament Square in London to reduce the need for police officers to control traffic. [2] Since then, electricity and computerised control has advanced traffic light technology and increased ...

  6. Emergency vehicle equipment - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_equipment

    Emergency vehicle equipment. An ambulance with two red revolving lights ( beacons) mounted above two flashing red lights, with two speakers between for the vehicle's electronic siren. Also seen are two antennae; the one seen between the two speakers is for a two-way radio, while the one seen in front of the flashing light on the left is ...

  7. William Potts (inventor) - Wikipedia

    en.wikipedia.org/wiki/William_Potts_(inventor)

    Biography. William Potts was born in Bad Axe, Michigan. The 1900 census lists Potts as 17 years old and a police officer. By 1910, he was married to Grace (Baker) Potts, and they subsequently had 4 children. Potts became the 'superintendent, signal person police' for the city of Detroit. The old system of police directing traffic had become ...

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