Indiana Code Title 8. Utilities and Transportation § 8-6-1-2

Sec. 2. The department shall secure from the several companies owning or operating railroads throughout this state detailed and specific information concerning the highway crossings along their lines, outside the corporate limits of cities and incorporated towns in this state, and, for that purpose, the department shall prepare and submit to each of such companies blank forms indicating the various items of information concerning such highway crossings upon which the department desires to be advised.  Such companies shall, within six (6) months after the receipt of such blank forms by them respectively, fill out the same with the complete information requested and return to the department a separate blank form so filled out for each such highway crossing, accompanied by a photograph of each separate crossing so described.  The department shall then proceed to examine the conditions of each highway crossing and ascertain which of the same should, under all the circumstances, be separated, and, to that end, the department may employ a civil engineer and such expert assistance as is necessary to make such investigation.