Emergency Vehicle Equipment 05
Emergency Vehicle Equipment 05 : Visual Warning Devices: (2) Active Visual Warnings: An American fire engine lit up at night. Notice the use of lights and reflective markings on the vehicle. An American ambulance also with all its lights turned on. The active visual warnings are usually in the form of flashing coloured lights (also known as 'beacons' or 'lightbars'). These flash in order to attract the attention of other road users as the emergency vehicle approaches, or to provide warning to motorists approaching a stopped vehicle in a dangerous position on the road (and if the emergency vehicle positions itself to deliberately move people away from an incident, this is called fend off). Common colours for emergency vehicle warning beacons are blue and red, and this varies by country (and sometimes by operator). The lights can be made to flash via a range of techniques, dependent on the technology used, and the desired end effect
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