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原文传递 Age Distribution and Vehicle Population Data, CRC A-88 Task 2

题名：	Age Distribution and Vehicle Population Data, CRC A-88 Task 2
作者：	Koupal, J.; DeFries, T.; Palacios, C.; Perez, H.
关键词：	Evaluation##Populations##Roads##Rural areas##Trucks##Urban areas##Motor vehicle emissions##Age distribution##Air quality##Cars##Data sources##Motor Vehicle Emissions Simulator(MOVES)##National Emissions Inventory(NEI)##
摘要：	This memo accompanies the delivery of revised vehicle age distribution and vehicle population data under Task 2 of CRC A-88, “State-Supported MOVES Input Improvements”, documenting how the data were derived and its proposed use in Version 2 of the 2011 National Emissions Inventory (NEI). Accompanying this memo are four MS Excel files containing the following: (1) Vehicle population for passenger cars (MOVES source type 21) and light trucks (MOVES source types 31+32) as of July 1 2011, for each U.S. county; (2) Age distributions for passenger cars and light trucks (in separate files) as of July 1 2011, for each U.S. county; (3) County FIPS code key (i.e. state and county). The revised age distributions and population data reflect the results of an analysis conducted by the CRC A-88 Project Team which determined that the IHS data does not adequately account for pre-1981 vehicles. These revised data will be used in Version 2 of the NEI automatically for any county that did not submit unique vehicle population and/or age distribution data through EPA’s NEI data submission system (EIS) for either Version 1 or Version 2. This would occur if a state made no submission of MOVES inputs, or a partial submission that did not include these data. For the latter case, the NEI submission checklist provided for a county through EIS was reviewed to determine whether the tables “source type year” (where vehicle population data resides), or “source type age distribution” were not checked, and/or if “Accept EPA default values” was chosen for the county. In addition, these data will be used by states instead of what they submitted if they have already indicated this preference to EPA.
总页数：	4
报告类型：	科技报告