This Walthers Cornerstone HO Scale Truss Railroad Bridge with Roadway kit is based on steel bridges that carry both rail and vehicle traffic across rivers, highways, and industrial zones throughout North America. Perfect for urban and industrial scenes, this unique design features a full single-track Arched Pratt Truss railroad bridge with an attached roadway cantilever, allowing both rail and vehicular traffic to share the same span efficiently. Typical North American design seen from the steam era to the present Roadway includes deck, guardrails, and structural supports Matches NMRA overhead clearance clears double-stacks and other tall cars Easily integrated into new or existing scenery Simulated steel construction with detailed girders, lattice work, and rivets Use with WalthersTrack(TM) Code 83 Bridge Track (948-83004, sold separately) and your choice of HO roadway surfaces Molded in dark gray plastic Part of the Cornerstone HO Scale Engineered Bridge System. Kit measures: 24.9 x 4.9 x 5.2′ 63.12 x 12.55 x 13.28cm