Indiana Code Title 9. Motor Vehicles § 9-21-8-3

Sec. 3. (a) The Indiana department of transportation may adopt rules to restrict the operation of a truck to a certain lane or lanes of a state maintained highway and to a certain lane or lanes of a street of a city or town that is a part of the state highway system and is maintained by the state.

(b) The Indiana department of transportation may post a state highway or a city or town street that is a part of the state highway system with appropriate directional signs and signals.