Pennsylvania Avenue lighthearted celebrations, including a series of day- and nighttime Shriner's parades in the 1920s and 1930s. Thomas and Concepcion Picciotto are the founders of the White House Peace Vigil, the longest running anti-nuclear peace vigil in the US, at Lafayette Square on the 1600 block of Pennsylvania Avenue. After the Oklahoma City bombing in 1995, the Secret Service closed the portion of Pennsylvania Avenue in front of the White House to all vehicular traffic. Pedestrian and bicycle traffic, however, was still permitted on the sidewalk. After 9/11 this policy was made permanent. Near the White House traffic is redirected to
Pennsylvania Avenue Line (Washington, D.C.) supplemented by the Friendship Heights–Southeast Line, operated by Routes 30N and 30S, which traverse the same route as the 32, 34, and 36, but continue north along Wisconsin Avenue to Friendship Heights. The Pennsylvania Avenue Line was the main line of the Capital Traction Company, connecting Georgetown to the Navy Yard. As authorized in the charter, it began at M Street North and Wisconsin Avenue in Georgetown, and headed east and southeast across Rock Creek on the Pennsylvania Avenue Bridge (shared with the Washington Aqueduct). Because the White House and Capitol lie directly in the line of Pennsylvania Avenue, diversions