For his presentation, Dr. Baldauf will summarize the U.S. EPA’s research program on the use of built and green infrastructure to mitigate local air pollution impacts from transportation facilities. His presentation will describe the current scientific understanding of how urban infrastructure affects local air quality, including a review of projects conducted in the US and other parts of the world investigating solid noise barrier and roadside vegetation impacts in particular. He will also summarize existing resources developed by the U.S. EPA to assist environmental and health professionals, urban planners, and developers to identify best practices to mitigate local air pollution impacts and avoid unintended consequences where urban infrastructure may exacerbate local air quality concerns.