Characterizing Determinants of Near-Road Ambient Air Quality for an Urban Intersection and a Freeway Site

This report, available for downloading below, presents a study study led by H. Christopher Frey of North Carolina State University in Raleigh. The investigators measured six air pollutants (nitrogen oxides, ultrafine particles, black carbon, fine particles, nitrogen dioxide, and ozone) near a freeway and in an urban area. They collected detailed data on real-world motor vehicle traffic intensity, vehicle behavior (e.g., acceleration, breaking, and turning), and the resultant emissions. They developed statistical models of the air pollutant concentrations based on the other data, including parameters based on locale-specific traffic and meteorology.