Definitions for "National Highway System"
The national transportation system designated by Congress that includes the Interstate Highway System and other nationally significant roads for interstate and interregional travel, national defense, intermodal connection, and international commerce.
A proposed transportation system consisting of approximately 155,000 miles of highway in order to provide an interconnected system of principal arterial routes serving major population centers, major transportation facilities, major travel destinations, interstate and interregional travel and meeting national defense requirements. The NHS, defined in the Intermodal Surface Transportation Efficiency Act (ISTEA), is one component of the National Transportation System (NTS).
This system of highways designated and approved in accordance with the provisions of 23 U.S.C. 103b). (23CFR500)