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{{Short description|Lighting system of a motor vehicle}}
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{{For|the company owned by Magneti Marelli|AL-Automotive Lighting}}
{{Use dmy dates|date=November 2020|cs1-dates=y}}
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[[File:Cornering lamp on Oldsmobile 98.jpg|thumb|A cornering light on a 1983 [[Oldsmobile 98]]]]
On some models, cornering lights provide steady-intensity white light for lateral illumination in the direction of an intended turn or lane change. They are generally actuated in conjunction with the turn signals, and they may be wired to also illuminate when the vehicle is shifted into reverse gear.<ref name="R48"/> Some modern vehicles activate the cornering light on one or the other side when the steering wheel input reaches a predetermined angle in that direction, regardless of whether a turn signal has been activated.<ref>{{
American technical standards contain provisions for front cornering lights<ref>{{cite web |url=http://www.sae.org/technical/standards/J852_200104 |title=SAE Standard J852, "Front Cornering Lamps for Use on Motor Vehicles" |publisher=Sae.org |access-date=2010-11-24}}</ref> as well as rear cornering lights.<ref>{{cite web |url=http://www.sae.org/technical/standards/J1373_200605 |title=SAE Standard J1373, "Rear Cornering Lamps for Use on Motor Vehicles Less than 9.1 m in Overall Length" |publisher=Sae.org |access-date=2010-11-24}}</ref> Cornering lights have traditionally been prohibited under international UN Regulations, though provisions have recently been made to allow them as long as they are only operable when the vehicle is travelling at less than 40 kilometres per hour (about 25 mph).<ref name="R48">{{cite web |url=https://www.unece.org/fileadmin/DAM/trans/main/wp29/wp29regs/2015/R048r12e.pdf |title=UN Regulation 48}}</ref><ref name="R119">{{Cite web |url=http://www.unece.org/fileadmin/DAM/trans/main/wp29/wp29regs/R119r1e.pdf |title=UN Regulation 119, "Cornering lamps for power-driven vehicles"}}</ref>
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===Turn signals===
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[[File:A16 Turn signals.svg|thumb|84x84px|left|ISO symbol for turn signals,<ref name=ISO-symbols/> UNECE 121 symbol<ref name="auto">
UNECE 1958 agreement, addendum 120, regulation 121</ref>]]
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== Self Driving ==
{{See also|Self-driving car}}
In December 2023, [[Mercedes-Benz]] received approval in [[California]] and [[Nevada]], the only states where it is legal to operate their [[Self-driving car|self-driving]] vehicles, for turquoise lights in accordance with SAE standard J3134, to indicate to outside observers that the car's self-driving system is engaged.<ref>{{Cite web |last=Banner |first=Justin |date=2023-12-19 |title=Two States OK Mercedes-Benz's Turquoise Lights Signaling Hands-Free Driving {{!}} Motor Trend |url=https://www.motortrend.com/news/mercedes-benz-turquoise-lights-sae-level-3-automated-driving/ |access-date=2024-05-17 |language=en}}</ref> Mercedes is the first car manufacturer to equip their self-driving vehicles with such lights.<ref>{{cite web |last=Thompson| first=Michelle|date=2023-12-28 |title=Mercedes to differentiate AVs with turquoise lights |url= https://www.repairerdrivennews.com/2023/12/28/mercedes-to-differentiate-avs-with-turquoise-lights/ |access-date=2024-05-17 |language=en}}</ref><ref>{{Cite journal |last=Caleffi |first=Felipe |last2=Rodrigues |first2=Lauren da Silva |last3=Stamboroski |first3=Joice da Silva |last4=Pereira |first4=Brenda Medeiros |date=2024-04-01 |title=Small-scale self-driving cars: A systematic literature review |url=https://www.sciencedirect.com/science/article/pii/S2095756424000254 |journal=Journal of Traffic and Transportation Engineering (English Edition) |volume=11 |issue=2 |pages=271–292 |doi=10.1016/j.jtte.2023.09.005 |issn=2095-7564|doi-access=free }}</ref><ref>{{Cite journal |last=Hirte |first=Georg |last2=Laes |first2=Renée |last3=Gerike |first3=Regine |date=2023-10-01 |title=Working from self-driving cars |url=https://www.sciencedirect.com/science/article/pii/S0965856423002057 |journal=Transportation Research Part A: Policy and Practice |volume=176 |pages=103785 |doi=10.1016/j.tra.2023.103785 |issn=0965-8564|doi-access=free }}</ref>
==Distributive lighting==
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