RSA 265:42 Required Position; Method of Turning at Intersections.

The driver of a vehicle intending to turn at an intersection shall do so as follows:
I.
Right Turns. 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.
II.
Left Turns.
(a) 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, a 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 commissioner of transpor