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

What is up with DRISI and the Reorganization?

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DRISI was formed from the merging of Divsion of TSI and the Division of Research and Innovation. We are located in two places. DRISI-HQ is in the Headquarters building, and DRISI-13th/O is located on 13th and O strets.Two of the Division of TSI offices, Office of Data Services and Technology (formerly Office of Data Analysis and GIS) and Office of Highway System Information and Performance and one branch of the Office of Planning, Policy, and Innovation are located at Caltrans Headquarters (1120 N Street). The rest of the Division are located at 13th and O Streets in the Veteran's Affairs building.

The third TSI Office, the Office of Travel Forecasting and Analysis, has merged with the Division of Transportation Planning (DOTP). but is still physically located in the same area on the fifth floor annex with the rest of us.

 

What Data is 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 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 Statewide Travel Demand Model (CSTDM). a multimodal, tour-based travel demand model covering the entire state, representing both personal and commercial travel. It incorporates statewide networks for roads, rail, bus, and air travel. It used the 2001 California Household Travel Survey, the 2000 United States Census and incorporated regional estimates of zonal land use, employment, and population for model calibration and base year assigment.
  • 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
    • 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?

 
 
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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? RITA!
    • 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 October 13, 2014