(A) 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 using any vehicle thereon, or by the willful mutilation, defacing, destruction, or removal thereof.
(B) Every person who is convicted of a violation of this section shall be guilty of a Class A misdemeanor, punishable by a fine of at least $250 in addition to any other penalty which may be imposed.
(ILCS Ch. 625, Act 5, § 11-312)