This page last reviewed February 5, 2009
EMFAC2007 Release
The EMission FACtors (EMFAC) model is used to calculate emission rates from all motor vehicles, such as passenger cars to heavy-duty trucks, operating on highways, freeways and local roads in California. EMFAC2007 is the most recent version of this model.For more information, please contact Jeff Long at (626) 450-6140.
REVISION: Both the EMFAC and OFFROAD Models develop CO2 and CH4 emission estimates; however, they are not currently used as the basis for ARB's official GHG inventory which is based on fuel usage information The ARB's official GHG inventory can be found at the link below:
http://www.arb.ca.gov/cc/inventory/inventory.htm
However, ARB is working towards reconciling the emission estimates from the fuel usage approach and the models.
Software
EMFAC2007 [3MB] Dated November 2006EMFAC2007 v2.3 User's Guide [PDF Format 2.7MB]
EMFAC2002 Training Materials
- Presentation [Powerpoint] [PDF]
- Description of Examples [MSWord] [PDF]
- Examples [zipped 3.3MB]
