to notify the engineer or other person in charge of or operating an engine to sound the engine's whistle in accordance with federal law. The railroad company shall maintain the sign in good repair or replace the sign. However, this subsection does not apply to a crossing to which an ordinance adopted under subsection (e) applies. The locomotive engineer or other person in charge of the train shall notify, in writing, the appropriate maintenance of way supervisor of the railroad of any missing or damaged whistle post, and the railroad shall, within thirty (30) days after the maintenance of way supervisor is notified under this subsection, repair or replace the missing or damaged whistle post.
The study by the department required under this subsection must be completed not later than one hundred twenty (120) days after the department receives notice of the passage of the ordinance from the city, town, or county.
IC 8-6-4-1