[§291C-37]  Interference with official
traffic-control devices or railroad signs or signals.  No person shall,
without lawful authority, attempt to or in fact alter, deface, injure, knock
down, or remove any official traffic-control device or any railroad sign or
signal or any inscription, shield, or insignia thereon, or any other part
thereof. [L 1971, c 150, pt of §1]