When a public way has been divided into 2 or more clearly marked lanes for traffic, the following provisions apply. [PL 1993, c. 683, Pt. A, §2 (NEW); PL 1993, c. 683, Pt. B, §5 (AFF).]
1. Single lane. A vehicle must be operated as nearly as practical entirely within a single lane.
1-A. Movement from lane. A vehicle may not be moved from a lane until the operator has first ascertained that the movement can be made with safety.
2. Two-way lane. On a public way that is divided into more than 2 lanes and one of those lanes provides for 2-way movement of traffic, a vehicle may not be operated in that lane except:
A. When overtaking and passing another vehicle when the way is clearly visible and the 2-way traffic lane is clear of traffic for a safe distance, unless an official sign or traffic control device limits the use of that lane to turning only; [PL 2007, c. 8, §1 (AMD).]
B. In preparation for a left turn from the 2-way traffic lane; [PL 2007, c. 8, §1 (AMD).]
C. When the 2-way traffic lane is at the time allocated exclusively to traffic moving in the direction the vehicle is proceeding and is posted to give notice of that allocation; or [PL 2007, c. 8, §1 (AMD).]
D. As part of a 2-part turn when the vehicle turning left from a driveway or entrance uses the 2-way traffic lane until the travel lane in the direction the vehicle is proceeding can be entered safely by the vehicle. [PL 2007, c. 8, §1 (NEW).]
3. Signs. An operator shall obey an official sign or traffic control device:
A. Directing slowly moving traffic to use a designated lane; [PL 1993, c. 683, Pt. A, §2 (NEW); PL 1993, c. 683, Pt. B, §5 (AFF).]
B. Designating a lane to be used by turning traffic or traffic moving in a particular direction regardless of the center of the way; or [PL 1997, c. 653, §8 (AMD).]
C. Prohibiting the changing of lanes on sections of a public way.