D.C. Mun. Regs. tit. 18, § 2304
2304.1 Between adjacent intersections controlled by traffic control signal devices or by police officers, pedestrians shall not cross the roadway at any place except in a crosswalk.
2304.2 Each pedestrian crossing a roadway at any point other than within a marked crosswalk, or within an unmarked crosswalk at an intersection, shall yield the right-of-way to all vehicles upon the roadway.
2304.3 No pedestrian shall cross a roadway at any place other than by a route at right angles to the curb or by the shortest route to the opposite curb, except in a crosswalk.
2304.4 On Kenilworth Avenue, N.E., between Benning Road and Eastern Avenue, no pedestrian shall cross the main roadway other than by proceeding over designated overpasses or through the designated underpasses.