23 CFR 490.503 - Applicability.

Regulations last checked for updates: Feb 10, 2026

Title 23 - Highways last revised: Jan 02, 2026

View all text of Subpart E [§ 490.501 - § 490.515]

§ 490.503 - Applicability.

(a) The performance measures are applicable to those portions of the mainline highways on the NHS as provided in paragraphs (a)(1) and (2) of this section (and in more detail in § 490.507):

(1) The Travel Time Reliability measures in § 490.507(a) are applicable to all directional mainline highways on the Interstate System and non-Interstate NHS.

(2) [Reserved]

(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]

authority: 23 U.S.C. 134,135,148; 49 CFR 1.85

source: 81 FR 13913, Mar. 15, 2016, unless otherwise noted.

cite as: 23 CFR 490.503