49 U.S.C. § 6309: National transportation atlas database

(a) In General.—The Director shall develop and maintain a national transportation atlas database that is comprised of geospatial databases that depict—(1) transportation networks; (2) flows of people, goods, vehicles, and craft over the transportation networks; and (3) social, economic, and environmental conditions that affect or are affected by the transportation networks. (b) Intermodal Network Analysis.—The databases referred to in subsection (a) shall be capable of supporting intermodal network analysis.