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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Oct 30, 2025
All Titles
Title 23
Chapter I
Part 490
Subpart H - Subpart H—National Performance Management Measures to Assess the Congestion Mitigation and Air Quality Improvement Program—On-Road Mobile Source Emissions
§ 490.801 - Purpose.
§ 490.803 - Applicability.
§ 490.805 - Definitions.
§ 490.807 - National performance management measure for assessing on-road mobile source emissions for the purposes of the Congestion Mitigation and Air Quality Improvement Program.
§ 490.809 - Data requirements.
§ 490.811 - Calculation of Total Emissions Reduction measure.
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