2007 On-Road Mobile Source Emissions Inventories for the Beaumont - Port Arthur Ozone Nonattainment Area
Author(s):
M. McGarry-Barber, C. Kite, M.E. Boardman, L.D. White, C.E. Bell, D.G. Perkinson
Publication Date:
August 2002
Abstract:
This Technical Note documents the methods the Texas Transportation Institute (TTI) used to develop the Beaumont-Port Arthur ozone nonattainment area (BPA) August 2007 on-road mobile source emissions estimates. These emissions forecasts are based on the August 2000 primary ozone episode meteorological conditions. (The August 2000 base-case, episode-specific, on-road mobile emissions estimates documentation, also produced under this task, are provid in a separate Technical Note.)
The three BPA counties are: Hardin, Jefferson, and Orange. The forecast period for the emissions estimates is the 11-day, base-year analysis sequence, Tuesday, August 22 through Friday, September 1. (Although the days-of-week are different for these dates in 2007, for modeling purposes, the base-year episode date and day-of-week sequences are maintained.)
Emissions of volatile organic compounds (VOC), carbon monoxide (CO), and oxides of nitrogen (NOx), are estimated for each county and day on an hourly basis. The hourly estimates are computed by network links (characterized by 28 facility types, including special intrazonal links) for which the geographical coordinates are provided. Emissions are categorized by 28 vehicle types and 14 pollutant-specific emissions types.
Documented within are the methods related to calculating inventory elements including link based 2007 vehicle miles traveled (VMT) estimates from the Beaumont?Port Arthur travel demand model (TDM), August day-of-week adjustments and Highway Performance Monitoring System (HPMS) consistency adjustments to VTM, speeds, VMT mix, MOBILE6 emissions factors, and emisions estimates.
Report Number:
TTI-2002-10
Electronic Link(s):
Document/Product
http://tti.tamu.edu/documents/TTI-2002-10.pdf
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