Publication Details

Title : MOVES3 Vehicle Operation Emission Factors
Publication Date : October 01, 2021
Authors : A. Burnham
Abstract : Vehicle operation air pollutant emission factors from gasoline and diesel vehicles are needed to construct baseline emission scenarios for well-to-wheels (WTW) analyses of both conventional and advanced vehicle technologies. Air pollutant emission factors vary over time with advances in engine technologies, changes in fuel specification regulations, deterioration due to vehicle age and mileage accumulation, implementation of tighter on-road emission controls such as inspection and maintenance (I/M) programs, and adoption of advanced emission control technologies, such as second-generation onboard diagnostics (OBD II), selective catalytic reduction, diesel particulate filters, and diesel oxidation catalysts. Therefore, up-to-date emission factors operations that reflect the latest vehicle technologies and emission control regulations are needed to understand pump-to-wheels emissions and to evaluate emission reduction potentials of alternative vehicle technologies.

GREET has historically used Unites States Environmental Protection Agency (EPA) modeling, beginning with MOBILE and then the Motor Vehicle Emission Simulator (MOVES), to estimate vehicle operation air pollutant emission factors of gasoline and diesel vehicles (Wang, 1999; Brinkman et al., 2005; Cai et al. 2013; Cai et al., 2015). Cai et al. (2013) documents emission factors from the first MOVES model, MOVES2010, while Cai et al. (2015) documents the second version MOVES2014 with a focus on trucks and buses. This document presents model year (MY)-based air pollutant emission factors from vehicle operation activities for light-duty, medium-duty, and heavy-duty vehicles using gasoline and diesel fuels. The data was generated using latest version of EPA’s mobile source emission modeling, MOVES3, and implemented into the GREET 2021 model (EPA, 2021).

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