The National Transportation Atlas Database (NTAD), published by BTS, 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 information for these features. There are approximately three dozen point, line and polygon “data themes,” comprising of about 60 total datasets that make up the NTAD.
Resource link: http://osav-usdot.opendata.arcgis.com/
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