The "Road" for Trains
In addition to the rail bed itself, numerous structures are part of any rail system.
Railway structures encompass a wide array of construction intended to support the track itself or house railway operations.
Common examples of track carrying structures are bridges, trestles, culverts, inspection pits, unloading facilities and similar construction. Ancillary structures include drainage lines, retaining walls, tunnels, repair shops, loading docks, fueling facilities, and towers.