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Caltrans manages more than 50,000 miles of California's highway and freeway lanes, provides inter-city rail services, permits more than 400 public-use airports and special-use hospital heliports, and works with local agencies. Caltrans carries out its mission of providing a safe, sustainable, integrated and efficient transportation system to enhance California’s economy and livability, with six primary programs: Aeronautics, Highway Transportation, Mass Transportation, Transportation Planning, Administration and the Equipment Service Center.

Data Extent

License

Other (Public Domain)

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Caltrans Annual Vehicle Delay

This data represents congested freeways organized by county and route, and ranked by Vehicle Hours of Delay where delay is defined as speeds below a certain threshold, in this case, 35 miles per hour. The data also has the corresponding Vehicle Miles Traveled (VMT) for each route.

FieldValue
Publisher
Modified Date
2018-03-08
Release Date
2016-08-11
Frequency
Annually
Homepage URL
Identifier
a32edf0c-46b6-4d8c-955f-2a996417c17b
Spatial / Geographical Coverage Area
POLYGON ((-124.28833007812 41.992160233376, -124.25537109375 41.869560826995, -124.34326171875 41.869560826995, -124.0576171875 41.557921577804, -124.15649414062 40.94671366508, -124.29931640625 40.613952441167, -124.48608398438 40.388396873884, -124.24438476562 40.136890695346, -123.82690429687 39.715638134796, -123.71704101562 38.891032826488, -123.16772460938 38.453588708941, -122.96997070312 38.160476280996, -123.046875 37.987504371064, -122.72827148438 37.892195547244, -122.51953125 37.675125278921, -122.50854492188 37.509725842938, -122.39868164062 37.361425501905, -122.42065429688 37.186578595249, -122.18994140625 36.932330061503, -121.8603515625 36.914764288956, -121.78344726562 36.738884124394, -122.01416015625 36.615527631349, -121.904296875 36.297418186508, -121.22314453125 35.612650818757, -120.95947265625 35.398005947151, -120.88256835937 35.308401401692, -120.849609375 35.191766965947, -120.64086914062 35.083955579276, -120.64086914062 34.642247047769, -120.46508789062 34.470335121217, -119.53125 34.406909656521, -119.30053710938 34.179997586881, -119.19067382812 34.098159345216, -118.7841796875 34.016241889667, -118.49853515625 34.016241889667, -118.46557617187 33.897777013859, -118.48754882812 33.77001515278, -118.33374023438 33.706062655101, -118.11401367188 33.742612777347, -117.79541015625 33.541394668983, -117.34497070312 33.201924189779, -117.19116210938 32.741082231501, -117.12524414063 32.55607364492, -115.91674804688 32.630123006707, -114.697265625 32.694865977875, -114.48852539062 33.587167339047, -114.49951171875 34.016241889667, -114.169921875 34.307143856288, -114.55444335938 34.723554927042, -114.67529296875 35.020999701115, -120.05859375 39.027718840212, -119.970703125 41.967659203678))
Spatial / Geographical Coverage Location
California
Temporal Coverage
Thursday, January 2, 2014 - 05:00 to Saturday, December 31, 2016 - 05:00
License
Other (Public Domain)
Author
Caltrans
Data Dictionary

Route: A numeric designation to a stretch of roadway to distinguish it from other routes.

Route Suffix: Letter designation after route number.
• See Route Suffix Chart for more information. Some locations may not have a value for this field.

County: Geographic subdivisions of the State of California.
• See County Chart for more information.

Rank: Ranking of Vehicle Hours of Delay.
• Range of VHD Rank: 1 to 165

Annual VHD at 35 mph: The VHD is the annual total hours that vehicles spend on the roadway due to congestion at 35 miles per hour (mph).

VMT: The VMT is the total amount of miles that all the vehicles have traveled over a certain section of freeway over a certain period of time. For example, for a single day, you might want to compute the VMT for I-5 northbound. This would mean that you sum up the total number of miles traveled by all the vehicles on that section of freeway for that day. A common interpretation of the VMT is that this is what is coming out of the freeway system, or, this is the output of the system (the input is the VHT).

Contact Name
Division of Traffic Operations, Office of Strategic Development, PeMS Branch
Contact Email
Public Access Level
Public