{"data":{"id":"us/23-cfr-490.607","jurisdiction":"us","citation":"23 CFR 490.607","heading":"National performance management measures to assess freight movement on the Interstate System.","body":"The performance measure to assess freight movement on the Interstate System is the: Truck Travel Time Reliability (TTTR) Index (referred to as the Freight Reliability measure).","path":["Title 23—Highways","CHAPTER I—FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER E—PLANNING AND RESEARCH","PART 490—NATIONAL PERFORMANCE MANAGEMENT MEASURES","Subpart F—National Performance Management Measures To Assess Freight Movement on the Interstate 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":"cfbf62ba439706dea4a8d8f4bccc15caea39f3bf811768ac247c4e3b15177729","source_id":"us-cfr","stale":true,"prev":"us/23-cfr-490.605","next":"us/23-cfr-490.609"},"notice":"GroundRules: Original legal text. Not legal advice."}