SUSQUEHANNA - CODE 100 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. WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.