There is established a residential permit parking program, whereby motor vehicles
bearing a special parking permit issued pursuant to this division may be parked in
excess of the time limits posted on streets within certain areas known as residential
permit parking areas. Parking a motor vehicle on a street within a residential permit
parking area may be restricted to a two-hour period for an established 12-hour period
in the vicinity of the traffic generator unless the motor vehicle displays such valid
parking permit. All presently existing residential permit parking programs and all
programs established in the future may opt into this two-hour non-permitted parking
element through a petition process within the residential permit parking area to be
established by the commissioner of the department of public works. Street signage
in each residential permit parking area must contain language that reflects the residential
parking permit hours, including the two-hour non-resident exception, if applicable.