Which lanes can Semi Truck use?


Each state has its own laws with regard to the legality of semis driving in the left lane.


However, in most states, semi-trucks can only legally drive in the left lane when they are:

  • passing another vehicle,

  • exiting to the left, or

  • making a left-hand turn.

When commercial trucks primarily stay in the passing lane, it can lead to dangerous truck accidents, severe injuries, and sometimes death.


Note that on a multilane highway, the designated lanes where large trucks and motor vehicles can operate are typically expanded.


Three-lane roadways restrict trucks to the right lane, but they can pass in the middle lane.


On a four-lane highway or more, truck tractors pulling semitrailers can operate in the two right-hand lanes.



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