Development of Gridded Mobile Source Emission Estimates for the Houston-GalvestonNonattainment Counties FY93, FY96, FY99, and FY07 in Support of the COAST Project

摘要

This report documents the methodology used to develop the Houston-GalvestonNonattainment Counties gridded mobile source emissions inventories. Included in the report are an overview of the emission estimation methodology and the 24-hour traffic assignments used in the analyses; the methods used to estimate the seasonally adjusted time-of-day vehicle miles of travel and associated operating speeds; the estimation of the emission rates using the EPA's MOBILE5a program; and an outline of the method used to develop the emission estimates using the MOBILE5a emission rates. These emission inventories were developed in support of the Coastal Oxidant Assessment of Southeast Texas Project (COAST), a large-scale study of ozone formation being conducted by the Texas Natural Resource Conservation Commission (TNRCC).