Indiana Code Title 8. Utilities and Transportation § 8-15-2-24

Sec. 24. (a) The authority shall cause a study to be made as to the feasibility of construction of additional interchanges along toll roads constructed or operated by the authority, and near population and traffic generating centers, including but not limited to, cities of the second class as defined by law.

(b) All such studies shall be made by the consulting engineer or engineers and the traffic engineer or engineers retained from time to time by the authority in connection with other of its duties under this chapter.

(c) Each study when completed shall be provided to the Indiana department of transportation.