LED DRLs on an Audi R8LED DRLs on a BMW 6 Series Gran Coupe
A daytime running lamp (DRL, also daytime running light) is an automotive lighting and bicycle lighting device on the front of a roadgoing motor vehicle or bicycle,[1] automatically switched on when the vehicle's handbrake has been pulled down, when the vehicle is in gear, or when the engine is started,[clarification needed] emitting white, yellow, or amber light. Their intended use is not to help the driver see the road or their surroundings, but to help other road users identify an active vehicle.[2]
^OECD, International Transport Forum (2013). Cycling, Health and Safety. OECD Publishing. pp. 168–169, 213. ISBN 9789282105955.
^Daytime running light European Commission
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