State Route 71 - Caltrans Freeway Projects 

California highways and freeways are the responsibility of the State of California and are managed by the California Department of Transportation (Caltrans). Caltrans periodically performs construction work on freeways in and around Chino Hills including State Routes 57, 60, 71, 91, and 142 (which includes Carbon Canyon Road). The City of Chino Hills and SR-71 falls primarily within Caltrans District 8, however many of the surrounding highways fall within neighboring Caltrans Districts 7 and 12.

Residents are encouraged to sign-up for each of the different agency's alerts to stay informed about projects, roadway impacts, and potential delays affecting their routes. Sign up for Caltrans District 8 Commuter Alerts and view the full list of Caltrans Districts to consider signing up for additional alerts.

State Route 71 to Interstate 10 Freeway Conversion Project

In spring 2021, Caltrans District 7 began a project along SR-71 to increase freeway capacity and relieve existing traffic congestion. The project will widen SR-71 between Interstate 10 and the Los Angeles/San Bernardino County line to convert the existing 4-lane expressway to a full 8-lane standard freeway and provide carpool lanes on SR-71 between Interstate 10 and State Route 91. The work will involve adding one mixed-flow lane and one High Occupancy Vehicle (HOV) lane in each direction and replacing two existing bridge structures over railroads and an existing pedestrian overcrossing as well as constructing retaining walls and sound walls.

Phase 1 (Mission Blvd to Los Angeles/San Bernardino County line) will take place from spring 2021 to spring 2024. Phase 2 (I-10 to Mission Blvd) will take place spring 2024 to spring 2027.

Know Before You Go

For more information, visit the Caltrans District 7 project website. To receive email updates about this project, contact the Caltrans representatives shown below:

Jeremiah Teves, Public Information Officer, Jeremiah.Teves@dot.ca.gov
Peter Jones, Public Information Officer, Peter.Jones@dot.ca.gov

To assist in planning your commute, view live traffic conditions using QuickMap and planned lane closures.