The parking spaces required by this chapter shall be provided and maintained so long as the structure that the parking spaces are designed to serve exists.
Required parking spaces shall not be reduced in total extent after their provision except upon approval of the Board of Zoning Adjustment and then only after proof that the parking spaces provided are no longer needed by reason of a reduction of employees, seats, gross floor area, dwelling units, or any other standard applicable to the use set forth in the regulations; provided the Board may impose any condition it deems necessary to ensure the addition of parking spaces in case of a subsequent increase in employees, seats, gross floor area, dwelling units, or any other unit of measurement.
All required parking spaces shall be clearly striped and lined according to the dimensions specified in § 2115. Durable materials that are all-weather shall be used. Striping shall be maintained for as long as the parking spaces requiring the striping are in existence.
Except as provided in §§ 2117.5 and 2117.6, each required parking space shall be accessible at all times directly from improved alleys with a minimum width of ten feet (10 ft) or improved public streets via graded and unobstructed private driveways that form an all-weather surface.
Except as provided in §§ 2115.9 through 2115.18 and 2117.6, when required parking spaces are so arranged that an aisle is required for accessibility or maneuvering space between rows of two (2) or more parking spaces, or between a row of two (2) or more parking spaces and the perimeter of the area devoted to parking spaces, the aisle shall have a clear width of not less than twenty feet (20 ft.) or ninety degree (900) angle parking, and not less than seventeen feet (17 ft.) for angle parking that is sixty degrees (600) or less as measured from the center line of the aisle.
Aisle widths as prescribed in § 2117.5 serving compact car spaces exclusively shall have a clear width of not less than twenty feet (20 ft.) for ninety degree (900) angle parking and not less than sixteen feet (16 ft.) for angle parking that is sixty degrees (600) or less as measured from the center line of the aisle.
The public rights-of-way as well as private walkways and driveways shall be protected from vehicular encroachment from all parking spaces by wheel bumper guards, curbs, guard rails, or screening between the property line and the perimeter of the parking area. Parking shall be designed so that no vehicle or any part thereof shall project over any lot line or building line.
A driveway that provides access to required parking spaces shall meet the following standards:
Driveways and parking for row dwellings shall be governed by the following special provisions:
All open parking spaces, including access aisles, driveways, and ramp areas shall be surfaced and maintained with an all-weather surface. In addition to traditional impervious surfaces, allowable all weather surfaces include porous (or pervious) concrete, porous asphalt, and/or mechanically-reinforced grass, excluding grass or gravel.
Landscaping with trees and shrubs shall be provided for all open parking spaces provided on a lot where there are more than ten (10) open parking spaces provided collectively as accessory to any building or structure. The landscaping shall cover a minimum of five percent (5%) of the total area devoted to parking, including aisles and driveways. The landscaping shall be maintained in a healthy, growing condition.
The open parking spaces shall be screened from all contiguous residential property located in an R-1, R-2, R-3, R-4, R-5-A, or SP District by a solid brick or stone wall at least twelve inches (12 in.) thick and forty-two inches (42 in.) high or by evergreen hedges or evergreen growing trees that are thickly planted and maintained and that are at least forty-two inches (42 in.) in height when planted.
Any lighting used to illuminate open parking spaces shall be so arranged that all direct rays of lighting are confined to the surface of the paved area devoted to parking.
Detailed plans shall be submitted to the D.C. Department of Transportation for approval of all curb cuts and driveway openings, to ensure that compliance with these regulations does not conflict with the responsibility of the Department to protect safety in the public space.
Required parking spaces for a gasoline service station permitted as a matter of right may be arranged so that all spaces are not accessible at all times. All parking spaces provided under this subsection shall be designed and operated so that sufficient access and maneuvering space is available to permit the parking and removal of any vehicle without moving any other vehicle onto public space.
Required parking spaces for a Police Department General Facility or Police Department Local Facility may be arranged so that all spaces are not accessible at all times.
D.C. Mun. Regs. tit. 11, r. 11-2117