Indiana Code Title 14. Natural and Cultural Resources § 14-18-12-1

Sec. 1. (a) Except as provided in subsection (b), all or part of a public highway, street, or alley, except a state highway, that is located on or inside the boundaries of a state park, state forest, state game preserve, or scenic or historic place owned by the state on June 7, 1937, is vacated.

(b) If:

the part of the public highway that provides the only public access to and outlet from the privately owned land is not vacated as long as the condition exists.