Whenever any ordinance of the City designates
any one-way street or alley, the City Traffic Engineer shall place
and maintain signs giving notice thereof, and no such regulation shall
be effective unless such 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.
Upon those streets and parts of streets and
in those alleys described and designated by ordinance, 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.