In this chapter:

   (1m)   “Department” means the department of transportation.

   (2)   “Office” means the office of the commissioner of railroads.

   (2m)   “Railroad historical society” means a nonprofit historical society that operates railroad locomotives and rolling stock on railroad tracks for the purpose of historic preservation and is not a common carrier.

   (3)   “Railroad track equipment” means a device that is operated on rails and used primarily for the maintenance of railroads.