Sec. 9 . (a) A vehicle that travels at a speed less than the established maximum shall travel in the right lanes to provide for better flow of traffic on the interstate highways.
(b) This subsection applies to the operation of a vehicle:
(1) on a roadway that has two (2) or more lanes of traffic in each direction; and
(2) in the left most lane, other than a lane designated for high occupancy vehicles.
Except as provided in subsection (c), a person who knows, or should reasonably know, that another vehicle is overtaking from the rear the vehicle that the person is operating may not continue to operate the vehicle in the left most lane.
(c) Subsection (b) does not apply:
(1) when traffic conditions or congestion make it necessary to operate a vehicle in the left most lane;
(2) when inclement weather, obstructions, or hazards make it necessary to operate a vehicle in the left most lane;
(3) when compliance with a law, a regulation, an ordinance, or a traffic control device makes it necessary to operate a vehicle in the left most lane;
(4) when exiting a roadway or turning to the left;
(5) when paying a toll or user fee at a toll collection facility;
(6) to an authorized emergency vehicle operated in the course of duty; or
(7) to vehicles operated or used in the course of highway maintenance or construction.
(d) A person who violates this section commits a Class C infraction.
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