DAILY VARIABILITY OF MOTOR-VEHICLE EMISSIONS DERIVED FROM TRAFFIC COUNTER DATA

This work studied the daily variability of mobile sources in rural and urban areas, in and around the Atlanta Metropolitan Area. Traffic cou nter data collected during the 1992 Southern Oxidants Study Atlanta In tensive Study were used to analyze the spatial and temporal distributi on of traffic volume. A simple method to study the daily variability o f mobile emissions from the different types of urban and rural roads i s presented. The method is based on hourly traffic volume data and emi ssion factors and it has been generalized to describe the daily variab ility of mobile emissions for urban and rural areas and for the whole modeling domain. Implications of this study for improving mobile emiss ion inventories are also discussed.