National Transportation Atlas Database (NTAD)
- Transportation related geospatial data from the US Department of Transportation’s Operating Administrations (OAs), and reference information from other government agencies
- Geospatial data showing the location of transportation infrastructure/networks, how people and goods flow through the networks, and how the surrounding environmental, social, and economic conditions affect or are affected by the networks
- Data can be downloaded as a shapefile, Excel file, or KML file from an open data catalog. APIs are also provided through the catalog to ingest NTAD data into your own web mapping application.