California Department of Transportation

California Statewide Travel Demand Model

The California Statewide Travel Demand Model (CSTDM) Version 2.0 is a multimodal, tour-based travel demand model that can forecast all types of travel as well as interregional trips. It incorporates statewide networks for roads, rail, bus, and air travel. It used the 2012 California Household Travel Survey, the 2010 United States Census and incorporated regional data and projects for zonal land use, employment, and population for model calibration and base year assignment.

California Statewide Travel Demand Model Fact Sheet

WHAT IS THE PURPOSE OF THE CSTDM?

The CSTDM 2.0 is designed to bring a better estimate of interregional trips to regional travel demand models and to provide long distance travel estimates across multiple regions.  The CSTDM 2.0 provides model travel behavior for every resident of California as well as trip volumes and trip length distribution by trip purpose.

HOW IS THE MODEL RUN?

The CSTDM 2.0 utilizes Citilabs Cube modeling software and has been updated to provide future year datasets for 2015, 2020, 2035, 2040 and 2050. It has also been updated to a 2010 base year to take advantage of 2012 household travel survey data regarding interregional travel, census data and updated population and jobs forecasts post the 2008 recession.

HOW WAS THE MODEL PREPARED?

The update of the CSTDM was completed by Cambridge Systematics and HBA Specto Inc. In April 2014, Cambridge Systematics and HBA Specto, Inc. also prepared the updated model documentation and additional model resources available elsewhere on the website. The model has been updated to incorporate the 2012 California Household Travel Survey, the 2010 United States Census, and regional data and projects statewide.

WHO WILL USE THE CSTDM?

The model will be used by planners and engineers in the Caltrans Headquarters and districts, other state agency staff, such as with the California Air Resources Board and the California Energy Commission and Metropolitan Planning Organizations (MPOs) and Regional Transportation Planning Agencies (RTPAs).

Please click here to download the current CSTDM Trip Tables or Documentation.

For the past CSTDM 2009 Files, please click here.

Doug MacIvor, Chief
Statewide Modeling Branch
(916) 654-4853