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, the following requirements shall apply.
(A) A vehicle shall be driven as nearly as practical entirely within a single lane.
(B) A vehicle shall not be moved from the lane until the driver has first ascertained that the movement can be made with safety and then given a signal, not less than the last 100 feet traveled by the vehicle, of his or her intention to change lanes.
(C) Upon a roadway which is divided into three lanes, a vehicle shall not be driven in the center lane, except when overtaking and passing another vehicle where the roadway is clearly visible and the center lane is clear of traffic within a safe distance, or in preparation for a left turn or where the center lane is, at the time, allocated exclusively to traffic moving in the direction the vehicle is proceeding and is signposted to give notice of the allocation.
(D) A
TWO-WAY LEFT-TURN LANE is a lane near the center of the highway set aside for use by vehicles making left turns in both directions from or into the roadway. Two-way left-turn lanes shall be designated by distinctive roadway markings consisting of parallel double yellow lines, interior line dashed and exterior line solid, on each side of the lane. A vehicle shall not be driven in a designated two-way left-turn lane except when preparing for or making a left turn from or into a roadway. Vehicles turning left from the roadway shall not be driven in the two-way left-turn lane for more than 200 feet while preparing for and making the turn. A vehicle turning left onto the roadway may utilize the two-way left-turn lane as a staging area by stopping and waiting for traffic proceeding in the same direction to clear before merging into the adjacent lanes of travel. A left turn shall not be made from any other lane where a two-way left-turn lane has been designated; provided however, this section shall not prohibit driving across a two-way left-turn lane when moving from a service drive onto such marked roadway.
(E) Upon a roadway which is divided into four or more lanes, a vehicle proceeding at less than the maximum posted speed, except when reduced speed is necessary for safe operation, shall not impede the normal flow of traffic by driving in the left lane. The vehicle shall be driven in the right-hand lane, except when overtaking and passing another vehicle proceeding in the same direction or when preparing for a left turn at an intersection or into a private road or driveway.
(F) Official signs may be erected directing slow-moving traffic to use a designated lane or designating those lanes to be used by traffic moving in a particular direction regardless of the center of the roadway and drivers of vehicles shall obey the directions of every such sign.
(Prior Code, § 42-145)
Statutory reference:
Driving on roadways laned for traffic, see 47 O.S. § 11-309