(a) Approach the turn in the extreme left-hand lane lawfully available to traffic moving in the direction of travel of the turning vehicle;
(b) Make the left turn to the left of the center of the intersection whenever practicable; and
(c) Except as otherwise allowed by ORS 811.346, 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.
(2) The offense described in this section, improperly executing a left turn, is a Class B traffic violation. [1983 c.338 §624; 1985 c.16 §312; 1995 c.383 §60; 1997 c.468 §3]