§ 12-18. Proper side of roadway.

A. 

Upon all roadways of sufficient width a vehicle shall be driven upon the right half of the roadway, 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 roadway is closed to traffic while under construction or repair;

(3) 

Upon a roadway divided into three marked lanes for traffic under the rules applicable thereon; or

(4) 

Upon a roadway designated and signposted for one-way traffic.

B. 

Upon all roadways except one-way streets, 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 roadway, 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 road or driveway.