A ticket for this can cost money fast, raise insurance rates, and quietly shape who gets blamed after a crash. In an injury case, a driver accused of making an unsafe lane change may be tagged with a larger share of fault, which can reduce or even block recovery depending on the facts.

An unsafe lane change happens when a driver moves from one lane to another without making sure the move can be made safely. That usually means changing lanes without enough space, without properly checking traffic, while cutting off another vehicle, or without giving an appropriate signal. The core issue is safety, not just whether a turn signal flashed for a second out of habit. Under Maine's Rules of the Road in Title 29-A of the Maine Revised Statutes (2024), drivers must move between lanes only when the movement can be made with reasonable safety.

That matters in more than a traffic stop. If a lane change leads to a sideswipe, rollover, or chain-reaction crash - especially on icy Maine roads where stopping distance gets ugly in a hurry - the violation can support a claim of negligence. It may appear on a citation, police report, or insurer's fault assessment.

For an injury claim, an unsafe lane change often becomes a comparative fault fight. If both drivers share blame, Maine's modified comparative negligence rule can limit damages when the injured person is found partly responsible.