Wisconsin · Wisconsin Statutes — Vehicles (Ch. 340–349)
Wis. Stat. (Vehicles) § 347.23: Lamps on highway maintenance equipment
What this law says, in plain English
Highway maintenance vehicles and road machinery must display red lights or amber floodlamps during darkness to warn other drivers, unless traveling at normal traffic speed. Left-side operations require additional flashing or revolving amber warning lamps meeting specific technical standards.
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