D.C. Mun. Regs. r. 18-2207
The driver of a vehicle emerging from an alley, building, private road, or driveway shall stop the vehicle immediately prior to driving onto a sidewalk or onto the sidewalk area extending across the alley, building entrance, private road, or driveway, or in the event there is no sidewalk area, shall stop at the point nearest the street to be entered where the driver has a view of approaching traffic.
The driver of a vehicle crossing a sidewalk or sidewalk area shall yield the right-of-way to any pedestrian and all other traffic using the sidewalk or sidewalk area
The driver of a vehicle about to enter for cross a roadway from an alley or from any place other than another roadway shall yield the right-of-way to all vehicles approaching on the roadway to be entered or crossed.
The driver of a vehicle intending to leave a public roadway by turning left between intersections shall yield the right-of-way to any vehicle approaching from the opposite direction which is so close as to constitute an immediate hazard.
Motor vehicle operators approaching from the rear or approaching from the lane adjacent to a transit bus shall yield the right-of-way to the transit bus when the transit bus signals its intention to re-enter traffic. This section does not relieve an operator of a transit bus from the duty to drive with due regard for the safety of all persons using the roadway.
D.C. Mun. Regs. r. 18-2207