1999 and 2007 Near Nonattainment Area Domain On-Road Mobile Source Modeling Emissions Inventories For 201 HPMS-Based Texas Counties (TTI-2002-7)

This Technical Note is one of two reports which document the methods the Texas Transportation Institute (TTI) used to develop 1999 base case and 2007 future case September/August day-of week hourly on-road mobile source emissions inventories (EIs) for 210 Texas counties. These EIs will be used to photochemically model the August 13-22, 1999 ozone episode for the Tyler Longview-Marshal near-nonattainment area (NNA), and the September 13-20, 1999 ozone episode for the Austin, San Antonio, Corpus Christi, and Victoria NNAs. The 210 counties subject to this analysis are the central and eastern Texas counties. The 44 western counties outside of the analysis domain encompass an area including the cities of El Paso, Odessa, Lubbock, Amarillo, and Big Bend National Park. There are 18 NNA counties (actually 17, plus Kendall County which was included with the NNA counties for the purpose of procedure documentation, see Table 1 note) and 192 surrounding counties in the analysis. For nine of the 18 NNA counties, complete urban travel demand model (TDM) networks are available. A separate Technical Note documents the El methods applied to develop the TDM network link-based EIs for those nine counties. For the nine NNA counties (i.e., eight NNA counties plus Kendall County) without complete TDM networks, and the surrounding 192 modeling domain counties, the Texas Rural County Method (TRCM), a Highway Performance Monitoring System (HPMS)-based El method, was used. This Technical Note documents the methods TTI used to develop the TRCM EIs for these 201 counties.