The incident, which happened at the intersection of 14th and Constitution Avenue at about 6 a.m., was partially captured by nearby surveillance cameras. They showed the woman jogging across Constitution Avenue at 14th Street as a truck enters the intersection at the time woman was hit.
Police continue to look for the driver of the semi pulling a flat bed trailer. It was one of three incidents within a half hour of each other in different parts of the area.
The hit-and-run is one of three pedestrian related car accidents that happened over the weekend.
About 20 minutes earlier, another pedestrian had been pronounced dead at the scene of an incident in the 7500 block of Greenbelt Road in Greenbelt, Md. Police say the driver who struck 65-year-old Donald Graff remained on the scene.
Earlier that morning around 6:10 a.m., another driver failed to stop after critically injuring a 22-year-old Falls Church man who was attempting to cross Arlington Boulevard between Patrick Henry Drive and Manchester Street.
Fairfax County police say the vehicle may have front-end damage and a cracked or broken windshield.
The flurry of pedestrian accidents had some people out for exercise the following morning, thinking more about safety than usual.
One woman out walking near the scene of the fatal hit and run in the District said she knew how a lot of pedestrians, including her, "take chances."
Another woman out jogging admitted that she did concentrate on safety enough while "in the zone."
Anyone with information on the accidents is urged to call D.C. police at 202-727-9099 or Fairfax County police at 703-691-2131.