As provided in G.S. §§ 20-150, 20-150.1, and 20-153, where traffic lanes have been marked, it shall be unlawful for the operator of any vehicle to fail, or refuse, to keep such vehicle within the boundaries of any such lane, except when lawfully passing another vehicle, or preparatory to making a lawful turning movement.
(Code 1976, § 7.44) Penalty, see § 1-111