California Department of Transportation

California Motor Vehicle Stock Travel, and Fuel Forecast (MVSTAFF)

Caltrans has cancelled the MVSTAFF project and will no longer publish annual updates. Historical reports are available on the side bar.


We recommend California Air Resources Board's EMFAC database as a substitute. Historical data and forecasts from 1990 to 2035 are available for vehicle stock (population), VMT, number of trips, fuel consumption and various emissions for all vehicle classifications.


For more information about EMFAC, please contact:



EMFAC vehicle classifications are explained at:


EMFAC truck classifications may be converted to classifications used by California Energy Commission (CEC) and MVSTAFF by using the following table:

Truck Class Conversion.xlsx






Individual counties*

Go to EMFAC interface at:

and enter your parameters to generate the table.

Please enter your passcode (after selecting the years) to enable the multiple year features. If you do not have one, please send a request to


All counties* for a single year

Go to:

Click on EMFAC2011at the top. Then download EMFAC2011-SG. Follow instructions starting on page 8 of the attached User’s Guide:

Please note that the numbers for VMT, number of trips and fuel consumption are all daily values.



* Please note that some counties are split into segments and the values for segments should be combined to get county-wide values.

See Air Basin and County Map Boundaries at:


Another source of data that you may find useful is the California Public Road Data (CPRD) at:

It contains current and historical data from 2001 to 2011 (no forecasts)

EMFAC VMT's and some other values may be disaggregated to State vs. non-State highway classifications by using the California Public Road Data. CPRD may also be used to disaggregate the values to city level**.


** Please note that the data for smaller counties and cities in CPRD may not be reliable because of low sample counts.



Contact Person:

Mohammad Assadi
Phone: (916) 654-4238

Page updated on July 30, 2013