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| daytime running lamp ： ウィキペディア英語版 |
daytime running lamp
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,〔 automatically switched on when the vehicle is moving forward, emitting white, yellow, or amber light to increase the conspicuity of the vehicle during daylight conditions.
==Implementations==
Depending on prevailing regulations and vehicle equipment, the daytime running light function may be implemented by functionally specific lamps, by operating the low beam headlamps or fog lamps at full or reduced intensity, by operating the high-beam headlamps at reduced intensity, or by steady-burning operation of the front turn signals. Compared to any mode of headlamp operation to create the daytime running light, functionally dedicated DRLs maximize the potential benefits in safety performance and minimize fuel consumption, glare, motorcycle masking, and other potential drawbacks.〔
To prevent drivers from using DRL when low beam headlights are needed, some regions require the dashboard lights to be turned off when DRL are turned on.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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