The National Transportation Atlas Databases 2013 (NTAD2013) is a set of nationwide geographic databases of transportation facilities, transportation networks, and associated infrastructure. These datasets include spatial information for transportation modal networks and intermodal terminals, as well as the related attribute informa- tion for these features. Metadata documentation, as prescribed by the International Organization of Standards, is also provided for each database. The data support research, analysis, and decision-making across all modes of transportation. They are most useful at the national level, but have major applications at regional, State, and local scales throughout the transportation community.