California Department of Transportation
 

DRISI-HQ Frequently Asked Questions (FAQS)

We are the "Pathway to Information" so it is natural that many people come to us to help them find data, whether it is Caltrans' data or data from external sources. We have compiled the list below to help with questions our customers ask us frequently. This is not a comprehensive list. We will be updating it constantly.


FAQs Index:

General Questions > Highway Designation Informtion > Fuel > HPMS >State Highway System >
Vehicle Miles Traveled (VMT) > Travel Statistics > Maps > Modeling/Travel Forecasting/ Travel Surveys >
Miscellaneous: Web Feeds / State Comparisons / Other Data

General Questions

TSI , DRISI, and the Reorganization?

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Two of the Division of TSI offices, Office of Data Analysis and GIS and Office of Highway System Information and Performance have merged with Division of Research and Innovation to become Division of Research, Innovation, and System Information (DRISI).

The third TSI Office, the Office of Travel Forecasting and Analysis, has moved into the Division of Transportation Planning (DOTP). The staff in this office are physically located in the same area on the fifth floor annex with the rest of us.

We will try to make these changes as transparent as possible while maintaining our regular great customer service. We will keep you posted as the merger proceeds. Thank you in advance for your patience and understanding.

 

What Data are available from DRISI-HQ?

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Visit our data pages at:
 

More General Caltrans FAQs?

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Highway Designation Information

What is Functional Classification, National Highway System, and Map 21?

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Where can I find Roadway Designation Information?

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Where can I find functional classification information?

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Where can I find High Occupancy Vehicle (HOV) and other Managed Lanes Information?

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Fuel / HPMS / State Highway / Travel / Vehicle Miles Traveled (VMT)

Freeway Data?

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  • Where can I find more freeway data? Caltrans Performance Measurement System (PeMS) The traffic data displayed on the map is collected in real-time from over 25,000 individual detectors. These sensors span the freeway system across all major metropolitan areas of the State of California.
 

Highway Miles and VMT?

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  • Historical State Highway System volume and speed data, Traffic Counts (or Traffic Volumes) - Traffic Data Branch in Traffic Operations
  • HPMS Public Road Data from the HPMS Library - Statistical Information derived from the Highway Performance Monitoring System
  • Where can I find State Highway miles and Vehicle Miles Traveled (VMT)? California Motor Vehicle Stock Travel, and Fuel Forecast (MVSTAFF). This annual report estimates and forecasts the annual statewide and countywide number of vehicles, vehicle miles of travel (VMT), vehicle fuel consumption (VFC), and miles per gallon (MPG).- Although the MVSTAFF Project is on hold, historical data is listedfor years 2000 through 2008. It is recommended you use California Air Resources Board's EMFAC database for more recent data.
  • Traffic Operations Traffic Volumes Website is one-stop shopping for many data sets:
    • Vehicle Miles Traveled - Monthly estimates - Traffic Data Branch produces a monthly Vehicle Miles of Travel (VMT) report (also called the "Trend" report). This report estimates the number of vehicle miles that motorists traveled on California State Highways. On this same site you will find monthly trends going back to 1972.
    • Traffic Volumes [Annual Average Daily Traffic(AADT)] - Traffic counts
    • Ramp Volumes
    • Truck Traffic Volumes [Annual Average Daily Truck Traffic (AADTT)] - More Truck information
  • Is there any travel data available for my city or county?
 

Highway Performance Monitoring System (HPMS) Data?

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Vehicle Fuel Consumption information?

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Travel and Related Data?

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Maps: Interactive and Data Rich

Where can I find Interactive Maps?

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The Office of Data Analysis and GIS:

 

Maps with Related Data?

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Modeling / Travel Forecasting / Travel Surveys

Where can I find Modeling and Forecasting Information?

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Where can I find Statewide Modeling information?

  • Statewide Modeling
  • Where can I find statewide travel related statistics and technical support for regional travel modeling, demographic analysis, and technical research?
    Statewide Travel Model
  • How can I find the number of vehicles, vehicle miles of travel (VMT), vehicle fuel consumption (VFC), and vehicle fuel economy (VFE) for the state and counties?
    MVSTAFF Publication
 
 
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Miscellaneous Transportation Data

Information about data web feeds?

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  • Can companies purchase a web feed of traffic information from Caltrans?Our website, Caltrans Commercial Wholesale Web Portal, allows access to our raw data that is used by many Information Service Providers. This portal provides a single location to obtain the following information: Vehicle Speed and Volume Traffic Data Closed Circuit Television (CCTV) Video Images. Changeable Message Sign (CMS) Traffic Messages posted on electronic variable message signs Lane Closure System (LCS) Data Roadside Weather Information Systems (RWIS) Weather and Fog Information.
  • Other Traffic Data Available for Web Feed?
 

Where can I find State Data Comparisons?

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  • Is there any place to find State-by-State Transportation Facts, Comparisons and Rankings?
    • U.S. Department of Transportation (DOT), the Bureau of Transportation Statistics (BTS), Research and Innovative Technology Administration (RITA)
 

Other Miscellaneous Data Available

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Updated on December 4, 2013