D.C. Code § 9-101.12

The Mayor of the District of Columbia is hereby authorized, whenever in his judgment the public interests require it, to prepare a new highway plan for any portion of the District of Columbia, and submit the same for approval, after public hearing, to the National Capital Planning Commission; such highway plans shall be prepared under §§ 9-101.04 to 9-101.06 and 9-103.01 to 9-103.05, and upon approval and recording of any such new highway plan it shall take the place of and stand for any previous plan for the portion of the District of Columbia affected.