Ind. Code § 8-6-2.1-1

Sec. 1. The board of public works or board of public works and safety, referred to in this chapter as the board, of a city may, by resolution, require the separation or alteration of the grade levels of any public highway in the city and of any railroad crossing the public highway, either by carrying the public highway under or over the railroad, or by carrying the railroad under or over the public highway, or by any combination of these means.