The purpose of this document is to review and evaluate current methods used to estimate air emissions from freight transportation activities and determine their suitability for decision making and public education. All freight modes are represented, including heavy-duty trucks, rail, oceangoing vessels, harbor craft, cargo handling equipment, and air freight. To the extent possible, three geographic scales are analyzed for each mode, namely at the national, regional, and local/project levels. This report is organized by transportation mode since many emission models and methods used to estimate freight emissions are specific to each mode. Methods, models, and parameters are discussed for each freight mode. The accuracy of models to estimate emissions is described for each mode as well as the data collection process and system boundaries. Pollutants of concern include greenhouse gas emissions, criteria pollutants, and air toxics.
Representing Freight in Air Quality and Greenhouse Gas Models. NCFRP Report 4
2010
171 pages
Report
No indication
English
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