Bridge Billboards for your Layout Railroads once considered bridges as locations to fly the company flag, so many painted them with logos and billboard advertising. These plate-girder bridges are based on those used across the continent and each comes decorated with period railroad graphics. The layout-ready models also feature nickel-silver Code 100 rail. Code 100 Plate Girder Bridges CNW (green) GN (black) N&W (silver) PRR (black) WM (silver)