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.

The Riverside County Transportation Commission, in partnership with Caltrans, is reconstructing the State Route (SR) 71/91 Interchange in Corona. Construction will take place from early 2023 to 2025. The new non-tolled interchange is designed to improve safety, expand access to other modes of travel, reduce greenhouse gas emissions, and enhance traffic flow. The project will support continued movement through this area by native wildlife such as mountain lions, bobcats, and coyotes.

The project will:

  • Replace the existing single-lane loop connector between eastbound 91 and northbound 71 with a new, two-lane, direct flyover connector ramp
  • Build an eastbound 91 auxiliary lane to improve access to the new direct connector to northbound 71
  • Realign the eastbound 91 on-ramp from Green River Road to improve access to the 71/91 Interchange
  • Realign southbound 71 to create space for the new direct connector

The project will NOT create additional lanes on the SR-71.

State Route 71 to Interstate 10 Freeway ConversionSR-71 Caltrans Freeway Conversion Project Map 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,
Peter Jones, Public Information Officer,

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