Ind. Code § 8-23-9-45
Where the track or tracks of any steam, electric, interurban, or street railroad company occupies any part of a highway that is ordered improved and maintained by the department under this chapter, the railroad company shall improve and maintain, or pay for the cost of improving that part of the highway occupied by its tracks, including the space between the rails, the space between the tracks, if there is more than one (1) track, and the space eighteen (18) inches in width on the outside of the rails. In all cases where practicable, improvement to the full width shall be constructed outside the area occupied by the tracks, and, where not practicable to do so, the department may require the tracks to be removed to that part of the highway outside the area to be so improved.
IC 8-23-9-45