Highway and Vehicle Pollutant Levels Along Texas Border Towns (7-2997-S)

The passage of the 1990 Clean Air Act Amendments (CAAA) has resulted in several Texas urban areas being declared nonattainment areas. Several other areas need to take actions to maintain current air quality levels to avoid being declared nonattainment. Many of these areas are considering transportation-related strategies to reduce emissions. This project quantifies on-road mobile source emissions within the four most populous border counties (Cameron, El Paso, Hidalgo, and Webb) and evaluates the contribution of Mexican vehicles to the overall emission levels. Information is also provided on the impacts of delay and idling at the international bridges. This information will assist in developing strategies to reduce or limit the growth of on-road mobile source emissions through transportation projects and programs.