Title 23 › Chapter CHAPTER 1— - FEDERAL-AID HIGHWAYS › § 167
Creates a National Highway Freight Network and a national highway freight program run by the Federal Highway Administration (FHWA) to make freight move more efficiently on key U.S. highways. The Network starts with a 41,518‑mile primary freight system and also includes critical rural freight corridors, critical urban freight corridors, and parts of the Interstate System not on the primary system. Every 5 years, starting 5 years after the FAST Act, FHWA will review and can redesignate the primary system, using data and state input, and may add up to 3 percent more miles. When deciding changes, FHWA will look at things like where freight starts and ends, truck traffic share, key facilities and ports, access to energy and intermodal links, total freight tonnage and value, bottlenecks, and network connectivity. States and metropolitan planning organizations can nominate critical rural and urban freight corridors that meet set tests (examples: a rural principal arterial with at least 25 percent truck traffic, roads that serve big ports or facilities moving 50,000 TEUs or 500,000 tons, or routes important to state freight). A State may pick up to 300 miles or 20 percent of its primary system (or 600 miles or 25 percent if it has low population density per the 2010 census). Urban areas use either the MPO or the State to nominate corridors depending on whether the metro area has 500,000 people or more; each State can designate up to 150 miles or 10 percent. States must use their funds apportioned under 104(b)(5) to improve freight on the Network. If a State’s share of the primary system is 2 percent or more, its funds may be used only on the primary system and the critical corridors; if under 2 percent, funds may be used on any Network component. Two years after the FAST Act, a State must have a freight plan under 49 U.S.C. 70202 to obligate these funds. Projects must help freight move more efficiently and be in the State’s freight investment plan. Up to 30 percent of a State’s money can go to freight intermodal or rail projects. Eligible uses include planning and design, construction and reconstruction, intelligent transportation and freight tech, environmental and community mitigation, truck lanes and parking, ramp and interchange fixes, cargo screening and credentialing tech, resiliency work, and other highway or bridge projects that improve freight flow. States may also fund diesel retrofits for class 8 trucks and pay for data, performance target work, and reporting. If a State misses freight performance targets two years after they are set, the State must report its trends, policies, bottlenecks, how it is spending freight funds, and what actions it will take. FHWA may set standards for “intelligent freight transportation systems,” and freight projects under this program are treated like Federal‑aid highway projects.
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Highways — Source: USLM XML via OLRC
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23 U.S.C. § 167
Title 23 — Highways
Last Updated
Apr 6, 2026
Release point: 119-73