Track King Ready To Run Electric Train Set - HO Scale. Rule the rails with the Bachmann Track King HO scale train set! Headed by a powerful EMD GP40 locomotive decorated in Union Pacific?s? iconic Armour Yellow paint scheme, the Track King is ready to conquer any freight job it faces with the included tank car, boxcar, flatcar, and caboose. Set up your track, move freight, and start building your very own HO scale railroading empire with the Bachmann Track King! This ready-to-run electric train set includes: EMD GP40 diesel locomotive with operating headlight, single-dome tank car, 40? boxcar, flatcar, off-set cupola caboose, 47? x 38? oval of snap-fit E-Z Track?, power pack and speed controller.