Indiana Code Title 8. Utilities and Transportation § 8-2.1-22-35

Sec. 35. In addition to the other powers conferred in this chapter upon the department, it may designate from time to time the public highways, as routes, over which carriers subject to this chapter may or may not operate, and may designate the time that the vehicles may or may not be operated   1 public highways, so as to prevent congestion that may affect the safety of persons or property upon the public highways.  The department may also provide for the enforcement of its orders and the notice of the orders, if any, that shall be given to such carriers.