(A) Whenever any roadway has been divided into two or more clearly marked lanes for traffic, in addition to all other rules consistent with this section, a vehicle shall be driven as nearly as practical entirely within a single lane and shall not be moved from the lane until the driver has first ascertained that the movement can be made with safety and given a signal, not less than the last 100 feet traveled by the vehicle, of his or her intention to change lanes.
(B) Where streets or roadways do not have marked traffic lanes, vehicles shall nevertheless keep in line or follow a straight course as nearly as practical and shall not weave in and out or turn from side to side unnecessarily. Vehicles shall move to the right or left only as necessary in slowing or stopping adjacent to the road, in passing slow moving vehicles, or when making a proper approach for a turn, and this only after the driver has first ascertained that the movement can be made safely and has signaled for a change of course.
(Prior Code, § 16-813) (Ord. 1618, passed 8-17-99) Penalty, see § 70.999