"RAIL".. Looking about 30 feet down through a wooden bridge, a section of rail from the mainline below, shines bright after recently being profiled from a Loram Rail Grinder. Notice: (fine scratch marks from the grinder stones) It's said that, a freight train can move one ton of freight approximately 500 miles on a gallon of diesel fuel... The condition of the rail plays a big part in that. So, processes like this make it possible.