{"data":{"id":"us/23-cfr-490.801","jurisdiction":"us","citation":"23 CFR 490.801","heading":"Purpose.","body":"The purpose of this subpart is to implement the requirements of 23 U.S.C. 150(c)(5)(B) to establish performance measures for State DOTs and the MPOs to use in assessing on-road mobile source emissions.","path":["Title 23—Highways","CHAPTER I—FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER E—PLANNING AND RESEARCH","PART 490—NATIONAL PERFORMANCE MANAGEMENT MEASURES","Subpart H—National Performance Management Measures to Assess the Congestion Mitigation and Air Quality Improvement Program—On-Road Mobile Source Emissions"],"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":"f3dfac81a72dc18c01b31af79b6ee7c69093d2406c00852498bd9d15e2932e0b","source_id":"us-cfr","stale":true,"prev":"us/23-cfr-490.713","next":"us/23-cfr-490.803"},"notice":"GroundRules: Original legal text. Not legal advice."}