{"data":{"id":"us/23-cfr-490.503","jurisdiction":"us","citation":"23 CFR 490.503","heading":"Applicability.","body":"(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):\n(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.\n(2) [Reserved]\n(b) [Reserved]","path":["Title 23—Highways","CHAPTER I—FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER E—PLANNING AND RESEARCH","PART 490—NATIONAL PERFORMANCE MANAGEMENT MEASURES","Subpart E—National Performance Management Measures To Assess Performance of the National Highway System"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-23.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:50Z","sha256":"d17ff070898b46f3599895881423c56d6094fefdf2b3fa1387b31f6a0c6f62c5","source_id":"us-cfr","stale":true,"prev":"us/23-cfr-490.501","next":"us/23-cfr-490.505"},"notice":"GroundRules: Original legal text. Not legal advice."}