23 C.F.R. § 490.507

National performance management measures for system performance

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There are two performance measures to assess the performance of the Interstate System and the performance of the non-Interstate NHS for the purpose of carrying out the National Highway Performance Program (referred to collectively as the NHS Performance measures).

(a) Two measures are used to assess reliability (referred to collectively as the Travel Time Reliability measures). They are:

(1) Percent of the person-miles traveled on the Interstate that are reliable (referred to as the Interstate Travel Time Reliability measure); and

(2) Percent of person-miles traveled on the non-Interstate NHS that are reliable (referred to as the Non-Interstate Travel Time Reliability measure).

(b) [Reserved]

[82 FR 6031, Jan. 18, 2017, as amended at 83 FR 24936, May 31, 2018; 88 FR 85392, Dec. 7, 2023; 90 FR 16466, Apr. 18, 2025]

Notes of Decisions

Cited in 1 case (1 in the last 5 years), 2024–2024 · leading case: Commonwealth of Kentucky v. Fed. High. Admin. (W.D. Ky. 2024).

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Commonwealth of Kentucky v. Fed. High. Admin. (W.D. Ky. 2024). “”) (to be codified at 23 C.F.R. § 490.507 ). But because Congress has defined “the National Highway System [to] include[e] the Interstate System,” nothing in this litigation appears to turn on this distinction and this opinion refers only to the National Highway System.”

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