State Route 71 - Caltrans Freeway Projects 

State Route 71 Freeway Conversion Project

In spring 2021, the California Department of Transportation (Caltrans) will begin a project along State Route 71 (SR-71) to increase freeway capacity and relieve existing traffic congestion. The project will widen State Route 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 replace two existing bridge structures over railroads and an existing pedestrian overcrossing as well as constructing retaining walls and sound walls.

Where:

SR-71 between Interstate 10 and the Los Angeles/San Bernardino County line at State Route 60.

When:

Phase 1 (Mission Blvd to Los Angeles/San Bernardino County line)
Construction Phase: Spring 2021 to Spring 2024

Phase 2 (I-10 to Mission Blvd)
Construction Phase: Spring 2024 to Spring 2027

Project Cost:

Phase 1 (SR-60 to Mission Blvd) - $174,000,000
Phase 2 (Missions Blvd to I-10) - $170,000,000

SR-71 Freeway Conversion Project Fact Sheet (PDF)

SR-71 Slab Replacement From Chino Hills to Santa Ana Riverbed

The California Department of Transportation (Caltrans) will begin work on a slab replacement project on State Route 71 (SR-71) in and near Chino and Chino Hills. The project will feature bridge deck approach resurfacing, slab replacement and installation of polyester concrete from the LA / San Bernardino County line to just south of the Santa Ana Riverbed.

Where:

SR-71 from the LA / San Bernardino County line near State Route 60 to just south of the Santa Ana Riverbed

When:

Beginning in July, Caltrans will begin placing signage to prep for the construction work. The project is expected to be complete in the late Fall of 2021. Schedules can change due to inclement weather. 

Traffic impacts may include:

• Hours of operation: Monday through Friday from 8:00 p.m. to 6:00 a.m. nightly. 
  • Lane and ramp closures with the possibility of full closures; Alternative routes will be provided.
• California Highway Patrol will be on-site to assist with traffic concerns.

Project Cost:

$4.2 million

SR-71 Slab Replacement from Chino Hills to Santa Ana Riverbed - Caltrans Press Release (PDF)

Know Before You Go

To stay on top of roadwork in the Inland Empire go to Caltrans District 8 and sign up for commuter alerts. Follow Caltrans District 8 for the latest information on Facebook and Twitter. To assist in planning your commute, view live traffic conditions using QuickMap and planned lane closures.

For those with sensory disabilities requiring alternate formats (i.e. Braille, large print, sign language interpreter, etc.) and those needing information in a language other than English, please contact Public Affairs at 909-383-4631 or TTY 711.