§490.513. Calculation of National Highway System performance measures.
23 C.F.R. § 490.513
The NHS Performance measures in § 490.507 shall be calculated in accordance with this section by State DOTs and MPOs to carry out the Interstate System and non-Interstate NHS performance-related requirements of this part, and by FHWA to make the significant progress determinations specified in § 490.109 and to report on system performance.
The Interstate Travel Time Reliability measure specified in § 490.507(a)(1) shall be computed to the nearest tenth of a percent as follows:
Notes, amendments, and revision history
Amendments
[82 FR 6031, Jan. 18, 2017, as amended at 83 FR 24936, May 31, 2018; 88 FR 85393, Dec. 7, 2023; 90 FR 16466, Apr. 18, 2025]
Source
Source: 82 FR 6042, Jan. 18, 2017, unless otherwise noted.
Authority
Authority: 23 U.S.C. 134, 135, 148(i) and 150; 49 CFR 1.85.
Source
Source: 81 FR 13913, Mar. 15, 2016, unless otherwise noted.
Amendments
[82 FR 6031, Jan. 18, 2017, as amended at 83 FR 24936, May 31, 2018; 88 FR 85393, Dec. 7, 2023; 90 FR 16466, Apr. 18, 2025]