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Generating Detailed Emissions Forecasts Using Regional Transportation Models: Current Capabilities and Issues

by Robert G. Ireson, Air Quality Management, Systems Applications Int, San Rafael, United States,
Julie L. Fieber, Air Quality Management, Systems Applications Int, San Rafael, United States,
Marianne C. Causley, Air Quality Management, Systems Applications Int, San Rafael, United States,



Document Type: Proceeding Paper

Part of: Transportation Planning and Air Quality

Abstract:

Mobile source emission estimates have long been calculated using composite emission factors (expressed as grams of emissions per mile) and estimates of vehicle-miles travelled. Techniques now in use provide detailed emission estimates based on link-level outputs from regional transportation models and emission factors tailored to hourly link conditions. This paper describes capabilities and limitations of these techniques, and identifies near- and long-term issues in mobile source emission forecasting.

Subject Headings: Emissions | Air pollution | Mathematical models | Forecasting | Aircraft and spacecraft | Air quality | Vehicles

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