D.C. Mun. Regs. tit. 18, § 4033
4033.1 The lane(s) as indicated on the following streets shall be reserved for the use of bicycles and motorized bicycles; the operation of all other vehicles shall be prohibited within this lane.
SOURCE: Final Rulemaking published at 28 DCR 3894 (September 4, 1981), incorporating text of Proposed Rulemaking at 28 DCR 3042 (July 3, 1981).