(a) No person shall stop, stand or park any vehicle upon a street, other than an alley, in such a manner or under such conditions as to leave available less than ten feet of the width of the roadway for free movement of vehicular traffic, except that a driver may stop temporarily during the actual loading or unloading of passengers or when directed to by a police officer or traffic control signal.
Except as otherwise provided by law, no person shall stop, stand or park a vehicle within an alley except while actually loading and unloading, and then only for a period not to exceed thirty minutes.
(b) Whoever violates 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.