Name: National Network

Display Field: LNAME

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Description: The National Network was authorized by the Surface Transportation Assistance Act of 1982 (P.L. 97-424) as of December 22, 2020 and specified in the U.S. Code of Federal Regulations (23 CFR 658) to require states to allow conventional combinations on "the Interstate System and those portions of the Federal-aid Primary System serving to link principal cities and densely developed portions of the states on high volume routes utilized extensively by large vehicles for interstate commerce which do not have any unusual characteristics causing current or anticipated safety problems. “The National Network (NN) includes almost all of the Interstate Highway System and other, specified non-Interstate highways. The network comprises more than 200,000 miles of highways. The National Network supports interstate commerce by regulating the size of trucks. This file is a geospatial representation of the National Network as described in 23 CFR 658 Appendix A and should not be interpreted as the official National Network and should not be used for truck size and weight enforcement purposes or for navigation.

Service Item Id: c403a39f56984f6c8391bb557414bd12

Copyright Text: Credit the Assistant Secretary for Research and Technology/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD), and the Federal Highway Administration (FHWA).

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Spatial Reference: 102100  (3857)

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