A. Upon all streets of sufficient width, a vehicle shall be driven upon the right half of the street, except as follows:
1. When overtaking and passing another vehicle proceeding in the same direction under the rules governing such movement;
2. When the right half of a street is closed to traffic while under construction or repair;
3. Upon a street divided into three marked lanes for traffic under the rules applicable thereof; or
4. Upon a street designated and signposted for one-way traffic.
B. Upon all streets, any vehicle proceeding at less than the normal speed of traffic at the time and place and under the conditions then existing shall be driven in the right-hand lane then available for traffic, or as close as practicable to the right-hand curb or edge of the street except when overtaking and passing another vehicle proceeding in the same direction, or when preparing for a left turn at an intersection or into a private street or driveway.
(Ord. 321 Art. 5 § 1, 1974).