Maine Revised Statutes Title 29-A. Motor Vehicles § 2051. Traffic lanes

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;

B. In preparation for a left turn from the 2-way traffic lane;

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

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.

A. Directing slowly moving traffic to use a designated lane;

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

C. Prohibiting the changing of lanes on sections of a public way.