Indiana Code Title 9. Motor Vehicles § 9-21-5-7

Sec. 7. (a) A person may not drive a motor vehicle at a slow speed that impedes or blocks the normal and reasonable movement of traffic, except when reduced speed is necessary for safe operation or in compliance with the law.  A person who is driving:

shall give right-of-way to the other vehicles by pulling off to the right of the right lane at the earliest reasonable opportunity and allowing the blocked vehicles to pass.

(b) A person who fails to give right-of-way as required by subsection (a) commits a Class C infraction.