(a) The Director of Public Safety may cause stop signs to be installed in municipal parking lots at the intersection of two or more lanes of travel.
The operator of a vehicle shall stop in obedience to a stop sign so installed and shall yield the right of way to all other vehicles not so obliged to stop.
(b) Whoever violates any provision of this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.