(a) The driver of a vehicle intending to turn at an intersection shall do so as follows:

(1) Right turn. Both the approach for a right turn and a right turn shall be made as close as practicable to the right-hand curb or edge of the roadway;

(2) Left turn. The driver of a vehicle intending to turn left shall approach the turn in the extreme left-hand lane lawfully available to traffic moving in the direction of travel of such vehicle. Whenever practicable, the left turn shall be made to the left of the center of the intersection and so as to leave the intersection or other location in the extreme left-hand lane lawfully available to traffic moving in the same direction as such vehicle on the roadway being entered.

(b) The Department of Transportation and local authorities in their respective jurisdictions may cause official traffic-control devices to be placed within or adjacent to intersections or other locations and thereby require and direct that a different course from that specified in this Code section be traveled by turning vehicles, and when such devices are so placed, no driver of a vehicle shall turn a vehicle other than as directed and required by such devices.