A person commits a Class E crime if that person removes or tampers with a sign, light, flare, reflector or other signalling or safety device placed by the Department of Transportation, a county or municipal official or a contractor performing repairs or maintenance work on or adjoining a public way.   [PL 1993, c. 683, Pt. A, §2 (NEW); PL 1993, c. 683, Pt. B, §5 (AFF).]