It shall be unlawful for any person to willfully injure or damage any public highway or street, or any bridge or culvert, or to willfully damage, injure, or remove any sign, signpost, or structure upon or used or constructed in connection with any public highway or street for the protection thereof, or for the protection or regulation of traffic thereon, by any willfully unusual, improper, or unreasonable use thereof, or by willfully careless driving or use of any vehicle thereon, or by willful mutilation, defacing, destruction, or removal thereof.
(ILCS Ch. 625, Act 5, § 11-312) Penalty, see § 70.99