StacksVerified U.S. regulatory reference

23 CFR §490.801

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.