August 26–September 2, 2026

In addition to the projects listed below that may impact your commute, you can find information on work being done to enhance our City on the Capital Improvement Projects Map and the Road Construction Map.

Prepare for Daisy Chain Fields Music Festival

Daisy Chain Fields, a new music festival founded by Olivia Rodrigo and produced by C3 Presents, will debut at the Great Park August 29, from 10:30 a.m. to 10 p.m. 

Temporary closures of the Great Park and surrounding streets are in place through September 2. Please be aware of the following road closures.

Friday, August 28, at 8 p.m. to Sunday, August 30, at 8 a.m.

• Marine Way from Ridge Valley to Skyhawk
• Skyhawk from Marine Way to Great Park Boulevard

Saturday, August 29, at 6 a.m. to Sunday, August 30, at 1 a.m.

• Marine Way from Sand Canyon Avenue to Ridge Valley 
• Bosque from Great Park Boulevard to Hornet

Dash Passes for Resident Access
Lane and street closures will take place throughout the festival. Dash Passes for local access are available for residents who need to navigate the Resident Access Only streets August 29. A Dash Pass is a rearview mirror hanging tag or placard placed on the dashboard. Dash Passes do not provide parking on Resident Access Only streets; they only grant access past the traffic barricades. Dash Passes may be obtained from the Daisy Chain Fields Box Office during Dash Pass Distribution hours with required documentation.

Please visit the Daisy Chain Fields website for related information. For general feedback or support, please email neighborhood@daisychainfields.com.

JOST Bridge Trail Closure

A 20-foot section of the Jeffrey Open Space Trail (JOST) extension along Jeffrey Road south of Walnut Avenue will be closed beginning Monday, August 31, through the morning of Thursday, September 3, for trail enhancements. The JOST Bridge will remain open while the work is being done. 

For more information about the bridge and trail extension, visit cityofirvine.gov/jostextension.

Orchard Hills Neighborhood Street Rehabilitation

As part of the Street Rehabilitation Program, the City is performing pavement rehabilitation on residential streets in the Orchard Hills Neighborhood. The project includes: 

• Pavement rehabilitation on Culver Drive and Forge, north of Portola Parkway
• Slurry seal on Orchard Hills Drive
• The addition of a Class IV Protected Bike Lane on Culver Drive and Orchard Hills Drive

This project also includes utility coordination with the Irvine Ranch Water District.

Work occurs Monday through Friday from 7 a.m. to 5 p.m. and will continue through August.

Access to businesses and private streets/communities will be maintained during the project; however, access to streets and driveways may be temporarily restricted while work is underway. Neighborhood parking may also be limited during construction activities; vehicles must be parked outside the posted work areas until construction is complete and signage is removed. 

For more information, email pm@cityofirvine.org or call the project hotline at 949-724-6676.

Harvard Avenue & Michelson Drive Intersection Improvements

One eastbound and one westbound lane on Michelson Drive at Harvard Avenue are closed as work continues on the Harvard Avenue and Michelson Drive Intersection Improvements project. 

Phase 3 is underway and will continue through September. Work occurs Monday through Friday from 9 a.m. to 3:30 p.m.

This intersection widening project will enhance traffic flow through the intersection and improve signal timing coordination along the Harvard Avenue and Michelson Drive corridors.

The City is removing and replacing asphalt pavement, curb and gutter, curb ramps, and sidewalk, as well as modifying traffic signal equipment behind temporary traffic control delineators and permanent K-rail lane closures. The project is anticipated to be completed this fall.

For more information, email pm@cityofirvine.org or call the project hotline at 949-724-6676.

Jamboree Road and Main Street Intersection Enhancements

The Jamboree Road and Main Street Intersection project is underway with work occurring weekdays from 9 a.m. to 3 p.m.

The project, which will continue through winter, will widen and enhance the intersection and reduce traffic congestion on Jamboree Road and Main Street. Specific improvements include lengthening left turn lanes, removing islands at southwest and southeast corners, modifying the traffic signal system, implementing drainage, water quality, and street lighting upgrades, as well as installing Class II bike lanes. 

Every effort will be made to keep traffic flowing and minimize disruptions, but delays should be expected. Please consider using alternate routes.

For more information, email pm@cityofirvine.org or call the project hotline at 949-724-6676. 

I-5 Improvement Project Construction Impacts

The Orange County Transportation Authority (OCTA) is improving the I-5 Freeway from north of I-405 Freeway to State Route 55.

Peters Canyon Hiking & Riding Trail 

Nighttime construction activities and closures will be in place for the demolition of the remaining outer portions of I-5 at the Peters Canyon Hiking & Riding Trail. This work requires full closures of westbound and eastbound Peters Canyon Trail between Bryan Avenue and Harvard Avenue/Walnut Avenue Monday, August 31, through Friday, September 4, from 9 p.m. to 5 a.m.

For a full list of anticipated weekly closures and detours, and the most up-to-date project information, visit octa.net/I-5Project.

State Route 55 Dyer Road Lane Closures

Orange County Transportation Authority crews will be striping eastbound Dyer Road underneath State Route 55, which will require lane closures through Thursday, August 27, from 9 p.m. to 5 a.m.

This work is part of the Orange County Transportation Authority's State Route 55 Improvement Project. Please visit octa.net/55Construction for more information. 

State Route 261 Closures

The following nightly road closures in Irvine will continue on State Route 133 through Thursday, August 27, from 9 p.m. to 5 a.m. and Friday, August 28, from 9 p.m. to 8 a.m.

• Northbound State Route 261 between Walnut Avenue and Irvine Boulevard 
• Southbound State Route 261 between Irvine Boulevard and I-5 Freeway

View detours as well as other work impacting The Toll Roads.

Learn about additional projects throughout our City, including project descriptions and work hours, as well as any lane closures and night and weekend work, which may occur intermittently on major arterials when permitted.