Project Overview 

CORONA — The California Department of Transportation (Caltrans) alerts the public that crews have scheduled culvert operations on State Route 91 (SR-91) in Corona. Work activities will occur just west of Green River Rd. This is part of a $6M project to replace 82-foot-long segments of existing culverts and improve wildlife crossing linkage.

 

Construction signs have been placed in the project zone to alert drivers of the work area ahead. Work operations started fall 2025. All work is weather and material dependent. Project work is expected to be completed by fall 2027. 

What to Expect

 

Work currently is performed Monday through Friday from 7:00 a.m. to 3:00 p.m. and from 8:00 p.m. to 6:00 a.m. Culvert work may require various ramp, lane and shoulder closures as needed. Crews currently are performing demolition work. 

Please note that various work equipment and vehicles will be transporting material in and out of the project zone. Please reduce your speed when near work areas for the safety of crews and other drivers on the route. Construction signage will be placed ahead to indicate approaching roadway work.

Upcoming SR-91 Eastbound 55-Hour Lane Closures between State Route 241 and Green River Road (November 2026) 

Consecutive 55-hour closures of eastbound SR-91 lanes will occur between SR-241 and Green River Rd. on the following dates: 

• Friday, November 6 at 10:00 p.m. through Monday, November 9 at 5:00 a.m. 
• Friday, November 13 at 10:00 p.m. through Monday, November 16 at 5:00 a.m. 

Three lanes will remain open on SR-91 for traffic through access!

Full connector and ramp closures are required at the following locations: 

• Northbound SR-241 to eastbound SR-91 connector
• Eastbound Gypsum Canyon Rd onramp(s)
• Eastbound Green River Rd. offramp 

All work is weather and material dependent and may be changed or canceled at any time. 

Temporary traffic holds or alternating lane closures may occur as needed to support the removal and installation of channelizers. 

Additional weekend work may be required to complete project work activities. The closures will allow crews to safely demolish and excavate the existing culvert and install a replacement. 

Seek alternate routes to avoid delays! Please follow indicated detour signage! Drivers please note that various equipment and vehicles will be transporting material in and out of the project zone. Please reduce your speed when near work areas for the safety of crews and other drivers on the route! 

For questions please reach Robert Tsai

To stay on top of roadwork in the Inland Empire visit the Caltrans District 8 website and sign up for commuter alerts.

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.

Title VI Information

The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964, as amended, the Civil Rights Restoration Act of 1987, and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).

Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.

• Title VI Brochure (English, PDF)
• Title VI Brochure (Spanish, PDF)
• Title VI of the Civil Rights Act of 1964 (Caltrans Information)