Indiana Code Title 8. Utilities and Transportation § 8-6-2.1-8

Sec. 8. Where the highway is carried over the railroad, or where one (1) railroad is carried over another railroad, the clearance from the top of the railroad track to the bottom of the superstructure over the track must be at least twenty-two (22) feet.  The plans for the improvement shall not require a permanent grade of any main line railroad track to exceed three-tenths of one percent (.3%) unless a greater grade is agreed upon by the railroad company affected.