(1) A person commits the offense of making an improperly executed left turn if the person operates a vehicle and is intending to turn the vehicle to the left and the person does not:
(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.