June 25–July 2, 2025

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.

Culver & Alton Intersection Improvement

This intersection widening project will enhance traffic flow through the intersection and improve signal timing coordination along the Culver Drive and Alton Parkway corridors.

The next phase of work will include construction of a bus pad in the eastbound direction along Alton Parkway, east of the intersection. Alton Parkway eastbound traffic will be reduced to one travel lane for the duration of this phase. Construction is scheduled to continue Monday, June 30, through Thursday, July 3. Work will be done Monday through Friday from 9 a.m. to 3 p.m.

The entire project is anticipated to be complete in summer 2025.

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

Jeffrey Open Space Trail Bicycle & Pedestrian Bridge Project

Construction of the Jeffrey Open Space Trail (JOST) Bicycle and Pedestrian Bridge, a Class 1 Bridge that will connect the JOST/Cypress Village Trail to the north and the JOST extension to the south, is underway.

During the next phase of work, falsework plywood forms will be removed from over and across Walnut Avenue south of Jeffrey Road. This work will require a temporary nightly full street closure of Walnut Avenue and the southbound I-5 Freeway on- and off-ramps at Jeffrey Road, Monday, June 30, to Thursday, July 3, from 11 p.m. to 5 a.m. Additionally, there will be no access to the Caltrans Park & Ride.

In addition, the next phase of work will connect the new pedestrian bridge to the existing Cypress Village Trail, which requires a partial closure of the trail for a period of 90 days. The trail will be partially closed from Monday, June 30, to Tuesday, September 30.

The entire project is anticipated to be complete in March 2026.

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

Harvard Avenue & Michelson Drive
Intersection Improvements

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 will be 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.

Phase 1A began Wednesday, June 25, and will continue through August. Work will occur Monday through Friday from 7 a.m. to 3:30 p.m.

Phase 1A of the project will close the right turn lane in the eastbound direction on Michelson Drive at Harvard Avenue.

The project is anticipated to be complete in fall 2026.

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

Jamboree & Michelson Pedestrian Bridge Project

The City is beginning construction this month on the Jamboree & Michelson Pedestrian Bridge, which will enhance pedestrian safety, relieve traffic congestion, and serve as a gateway monument for anyone entering the Irvine Business Complex.

The City will be removing and replacing asphalt pavement, curb and gutter, curb ramps, and sidewalk. Elevator towers, stairs, bridge decks, and stainless steel supports will be installed, and traffic signal equipment will be modified. Work will be done behind temporary traffic control delineators and permanent K-rail lane closures.

Phase 1 began Monday, June 23, and will continue through October. Work will occur weekdays from 7 a.m. to 3:30 p.m.

Phase 1 will involve temporary lane closures in both directions of Jamboree Road and Michelson Drive. At the end of Phase 1, the southbound Jamboree Road to westbound Michelson Drive right turn lane will be closed.

The entire project is anticipated to be complete in summer 2027.

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

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

Civic Center Parking Lot Rehabilitation

As the City continues to make improvements to the Civic Center Parking Lot, construction has shifted to the southern lot. The access aisle along the Irvine Police Department building and east walkway will be closed for the next few weeks. 

Current work includes grinding existing pavement, grading, construction of the proposed asphalt concrete pavement, and striping. 

Work occurs Monday through Saturday from 6 a.m. to 7 p.m., weather permitting. Additional parking is available off of Harvard Avenue and San Juan.

The current construction phase has a significant impact on the availability of parking spots near the Civic Center entrance. Access to the perimeter drive aisle, accessible parking spaces, and EV charging stations will be available as safety permits.

While the Civic Center parking lot will be impacted, access to City Hall and the Irvine Child Development Center will be maintained. 

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

Construction of Public Walkways in the Irvine Business Complex

As part of the City’s ongoing effort to improve pedestrian access throughout the City, construction is underway on new public walkways in the Irvine Business Complex at Armstrong Avenue and Kettering Street.

Work began Monday, June 16, and occurs Monday through Friday from 7 a.m. to 7 p.m. on curb and sidewalk areas. When traffic control in the public roadway is required, work will occur weekdays from 9 a.m. to 3 p.m.

The entire project is expected to be complete in July.

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

State Route 133 Weekend Closure

The following nightly ramp closures in Irvine will continue on State Route 133 (SR-133) through Friday, June 27, from 11 p.m. to 5 a.m.

• The southbound State Route 133 (SR-133) connector to northbound I-405 Freeway.
  
  Detour: Exit on Barranca Parkway and turn left. Turn right on Irvine Center Drive and slight right to take the on-ramp to northbound I-405.
  
  
• The southbound SR-133 Barranca Parkway on-ramp.
  
  Eastbound Detour: Turn right on Irvine Center Drive and slight right to take the on-ramp to northbound I-405. Keep right to take the connector to SR-133.
  
  Westbound Detour: Turn left on Irvine Center Drive and slight right to take the on-ramp to northbound I-405. Keep right to take the connector to SR-133.
  

In addition,The southbound SR-133 connector to northbound I-5 Freeway will be fully closed through Friday, June 27, from 9 p.m. to 5 a.m.

For more information, visit Caltrans website. 

State Route 55 Lane Closures

To accommodate bridge reconstruction activities, Orange County Transportation Authority crews are closing Dyer Road underneath State Route 55 in each direction from 9 p.m. to 5 a.m. through Friday, June 27.

Detour signs will be posted in advance. Motorists are encouraged to plan ahead before traveling through the area. View freeway detours.

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.