The Atlas Through Plate-Girder Double-Track Bridge is a great addition to any HO layout. It's based on one of the most common bridges in use across the continent. It comes equipped with Code 100 nickel silver Atlas Snap Track with realistically spaced brown bridge ties. This easy-to-build kit includes parts for a double-track bridge. Multiple kits can be combined to make a wider bridge to accommodate one or more additional tracks for triple, quadruple or more track arrangements. The bridge measures 8" (20.3cm) long and the track length matches a standard Snap Track 9" (22.9cm) straight section.