ARTBA offered support April 7 of U.S. Environmental Protection Agency (EPA) efforts to increase the accuracy of information it uses when analyzing economic impacts of proposed Clean Air Act (CAA) regulations.  EPA is seeking public input on what type of data should be used when attempting to predict the overall effects of proposed CAA rules.  ARTBA’s comments stressed the importance of transportation projects to the nation’s economy and urged EPA to consider impacts to transportation improvements as part of its analysis.  ARTBA also noted that EPA must be flexible and take into account area-specific economic issues, such as those found in regional transportation plans.  Furthermore, ARTBA suggested EPA’s economic analysis be independently verified by a neutral party.  This comment period is particularly well timed, as just last week the agency’s own data suggested tightening federal ozone standards could cost up to $90 billion annually.