Caltrans GIS Data

High Occupancy Vehicle lanes

California High Occupancy Vehicle Lanes (2017)

High Occupancy Vehicle (HOV) lane, also known as the carpool or diamond lane. HOV feature class represents the existing, under construction, programmed, and proposed High Occupancy Vehicle lanes located on the state highway system.

Data Created: January 10, 2018
Last Modified: June 20, 2018


California Managed Lanes comprise of HOV Lanes, Express Lanes and Park and Ride facilities. It is a traffic management strategy to promote and encourage ridesharing; thereby alleviating congestion and maximizing the people-carrying capacity of California highways.

The locations of the HOV system are based on postmiles derived from an excel spreadsheet maintained by Caltrans, Division of Traffic Operations, Office of System Management Operations.


The maps and data are made available to the public solely for informational purposes. Information provided in the Caltrans GIS Data Library is accurate to the best of our knowledge and is subject to change on a regular basis, without notice. While the GIS Data Management Branch makes every effort to provide useful and accurate information, we do not warrant the information to be authoritative, complete, factual, or timely. Information is provided on an "as is" and an "as available" basis. The Department of Transportation is not liable to any party for any cost or damages, including any direct, indirect, special, incidental, or consequential damages, arising out of or in connection with the access or use of, or the inability to access or use, the Site or any of the Materials or Services described herein.


Tags: HOV, High Occupancy Vehicle lanes, California State Highway Systems, traffic operations, managed lane system
Credits: California Department of Transportation
File: Zipped shapefile: HOV Lanes 2017 , size 0.598 MB
Extent: California statewide
References: For more information about HOV, contact to Caltrans, Division of Traffic Operations. The website of California High Occupancy Vehicle Systems is at