Traffic control: traffic regulation; requirement to drive in the right-hand lane of a roadway with 2 lanes for travel in 1 direction; modify. Amends sec. 634 of 1949 PA 300 (MCL 257.634).

HB 4522 modifies Michigan's vehicle code to require heavy trucks (over 10,000 pounds gross weight) to drive in any lane on freeways with three or more lanes for travel in the same direction, rather than restricting them to the rightmost lanes. This directly affects commercial truck drivers and fleet operators on Michigan freeways. The law specifies exceptions allowing trucks to use the right lane only for left turns, safety reasons, or construction-related lane closures. It also prohibits local governments from creating conflicting lane-use ordinances for these situations.