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Answer:
is one or more visual warning lights fitted to a vehicle for use when the driver wishes to convey to other road users the urgency of their journey, to provide additional warning of a hazard when stationary, or in the case of law enforcement as a means of signalling another driver to stop for interaction with an officer.
These lights may be dedicated emergency lights, such as a beacon or a light bar, or may be modified stock lighting, such as a wig-wag or hide-away light, and are additional to any standard lighting on the car such as hazard lights. Often, they are used along with a siren (or occasionally sirens) in order to increase their effectiveness.
# ǫᴜᴇsᴛɪᴏɴ ᴀɴsᴡᴇʀᴅ
ᶜᵃʳʳʸ ᵒⁿ ˡᵉᵃʳⁿⁱⁿᵍ
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ.