mobile-sources. It is still a very relevant snapshot of on-road mobile projection approaches;

however, several of the references or statements in that document are now out of date, as follows.

Additionally, several new capabilities are available, which also are included in the list below.

# The newer versions of the MOBILE model support 28 vehicle types instead of the 8 types

listed in this document, however, the NEI and other inventories often group these 28 types

to the same 8 described in the document.

# The web sites for SCCs, AP-42 emission factors, and more information about area-source

inventories are out of date. These should be updated to the same sites as were listed in the

point sources section above.

# The EPA Office of Mobile Sources is now called the Office of Transportation and Air

Quality (OTAQ). Its website is

# The new website for the MOBILE model is

# The PART5 model is no longer used, because it has been superceded by the MOBILE

model, starting with version 6 (MOBILE6).

# The increased popularity of sport utility vehicles has continued, but may be affecting more

than only the percentage of light duty gasoline vehicles. Additionally, since MOBILE6

includes 28 vehicle types, the increases in larger and heavier vehicles can be more

carefully accounted for using MOBILE6 than the EIIP projection document mentions.

# Updates to the SMOKE model and other emissions models permit the temperature

information used in MOBILE6 to come from the prognostic meteorological models (e.g.,

MM5 and MCIP) that are used to prepare inputs to air quality models.

# OTAQ has created the National Mobile Inventory Model, which drives both the

MOBILE6 model and the NONROAD model to create base-year and future-year

inventories. Additional information on this tool is available at:

# The references in Table 4.1-1 are out of date and should be updated as follows:


n801 - n802 - n803 - n804 - n805 - n806 - n807 - n808 - n809 - n810 - n811 - n812 - n813 - n814 - n815 - n816 - n817 - n818 - n819 - n820 - n821 - n822 - n823 - n824 - n825 - n826 - n827 - n828 - n829 - n830 - n831 - n832 - n833 - n834 - n835 - n836 - n837 - n838 - n839 - n840 - n841 - n842 - n843 - n844 - n845 - n846 - n847 - n848 - n849 - n850


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