(A) Whenever any ordinance designates any one-way street or alley there shall be signs giving notice thereof, and no regulation shall be effective unless the signs are in place. Signs indicating the direction of lawful traffic movement shall be placed at every intersection where movement of traffic in the opposite direction is prohibited.
('76 Code, § 7-1071)
(B) Upon those streets and parts of streets and in those alleys described in Chapter 74 Schedule I, hereby made a part hereof, vehicular traffic shall move only in the indicated direction when signs indicating the direction of traffic are erected and maintained at every intersection where movement in the opposite direction is prohibited.
('76 Code, § 7-1072)