Abstract
Modeling Transportation-Related Emissions in GIS Track: Transportation Author(s): Peng Wu There are increasing requirements on the efficiency and accuracy of vehicular emission modeling because of significant contribution of the transportation sector to air quality and global warming problems. Because two essential components (i.e., transportation activities and emission factors) of vehicular emission modeling are inherently spatially dependent, this study aims to move the existing old-fashioned Direct Travel Impact Model (DTIM), the California-specific transportation-related emission inventory estimation model, toward a GIS-based model. The strengths of ArcGIS in data management, spatial analysis, and raster modeling are incorporated into three critical steps of emission modeling: combining travel activities (e.g., speeds and VMT) and emission factors, disaggregating zonal travel activities (i.e., interzonal trip ends and intrazonal travels), and gridding emissions into cells. This GIS-based method can promote an integrated transportation and air quality analysis. This proposed method will be applied to estimate vehicular emissions in the San Joaquin Valley, California. Peng Wu UC Davis Institute of Transportation Studies 404 Russell Park ##3 Davis , CA 95616 US Phone: 530-752-7132 E-mail: wupeng_ss@yahoo.com |
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