Computer modeling of transportation-generated air pollution. State-of-the-art survey, II. Final report, July 1976--June 1977

This report updates an earlier DOT survey on the mathematical modeling of air pollution from transportation sources. Up-to-date information is furnished on two subjects: (1) the characteristics of currently operational air pollution dispersion models suitable for analyzing transportation-generated pollutants -- 22 such models are covered and (2) the availability of air quality data acquired in the vicinity of transportation systems (e.g., highways and airports) -- 24 such data samples are identified. The computer modeling of inert gases, particulates, and reactive pollutants is discussed with emphasis on model types, implementation (i.e., input data, computer requirements, output) applications, model validation and availability. It is concluded that, although some progress has been registered in model development during the past 5 years and despite the fact that limited validation of some models has been achieved, no model in current use has been adequately tested and evaluated. Air quality data near transportation systems are categorized by type of site, dates of data acquisition, funding source, and data availability. The quality of the 24 data samples reported here is unknown.