Section 21-503 - Crossing at other than crosswalks(a) If a pedestrian crosses a roadway at any point other than in a marked crosswalk or in an unmarked crosswalk at an intersection, the pedestrian shall yield the right-of-way to any vehicle approaching on the roadway.(b) If a pedestrian crosses a roadway at a point where a pedestrian tunnel or overhead pedestrian crossing is provided, the pedestrian shall yield the right-of-way to any vehicle approaching on the roadway.(c) Between adjacent intersections at which a traffic control signal is in operation, a pedestrian may cross a roadway only in a marked crosswalk.(d) A pedestrian may not cross a roadway intersection diagonally unless authorized by a traffic control device for crossing movements. If authorized to cross diagonally, a pedestrian may cross only in accordance with the traffic control device.