Deterioration of the Pennsylvania Avenue historic district was apparent by the second decade of the 21st century. The PADC's 1960s design (which emphasized low sidewalk lighting so as not to detract from nearby Federal Triangle or the United States Capitol) left the street inadequately lighted at night. The National Park Service, chronically underfunded for the previous four decades, allowed the sidewalks, landscape plantings, and seating to deteriorate. The refusal of the federal government to allow retail in the Federal Triangle and the J. Edgar Hoover Building (largely for security reasons) discouraged foot traffic at night. Combined with low lighting, pedestrians felt the street was unsafe after dark.