Guensler, Randall; Shaheen, Susan; Mar, Francisca; Yee, … - Institute of Transportation Studies (ITS), University … - 1998
Under the requirement of the Clean Air Act (CAA), states are required to prepare air quality plans that outline how … areas currently violating national ambient air quality standards (non-attainment areas) will achieve the standards and will … avoid future significant deterioration of their air quality. On November 24, 1993, the U.S. Environmental Protection Agency …