Road Construction & Improvement Projects

October 23–30, 2024 

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.

Jeffrey/Alton Intersection Improvements

The City of Irvine has started construction on an intersection widening project that will enhance traffic
flow through the intersection of Jeffrey Road and Alton Parkway and improve signal timing coordination along both streets.

Phase 1 of the project will close the right turn lane and the bike lane in the southbound direction on Alton Parkway, south of the Jeffrey Road intersection. Work will be done Monday through Friday from 7 a.m. to 3:30 p.m. through mid-November.

The project includes removing and replacing asphalt pavement, curbs and gutters, curb ramps, sidewalk, and modifying traffic signal equipment behind permanent K-rail lane closures.

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

A bike detour is in place to accommodate bicyclists' needs and pedestrian crossings while work is being done. Access to area residences and businesses will be maintained during this first phase of the project. Traffic control including K-rails will be utilized to close travel lanes and direct traffic around the work areas. The work will generate construction noise including equipment backup alarms and heavy equipment engines.

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

Trabuco Road Improvements

Work continues on Trabuco Road between Jeffrey Road and Sand Canyon Avenue to remove and replace asphalt pavement, curbs and gutters, curb ramps, and sidewalk. In this final phase of the project, K-rail will be removed to complete paving, striping, and utility and traffic signal adjustments. 

This phase of the project began Monday, September 30, and will be complete Tuesday, November 5, weather permitting. Work will be done entirely behind lane closures between 9 a.m. and 3 p.m. Every effort will be made to keep traffic flowing; however, delays should be expected and motorists should consider using alternate routes. 

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

Overnight Lane Closures on I-405 Freeway 

Overnight lane closures will continue on the I-405 Freeway between the I-5 Freeway and Bear Street Monday–Friday, from 9 p.m. to 5 a.m. through October.

This project will replace pavement slabs on the northbound and southbound I-405 Freeway. 

Please note there will be loud noise related to this construction. Please follow all posted signs and traffic instructions. The work is weather-dependent and subject to change. Additional information on the project can be found on the Caltrans website. 

133 Toll Road Closures

The southbound 133 Toll Road connector to northbound I-5 Freeway will be fully closed from 10
p.m. to 5 a.m. through Friday, October 25 for miscellaneous work.

Detour: Exit on Irvine Boulevard and turn right. Turn left onto Sand Canyon
Avenue and continue straight. Turn right to take the on ramp to northbound I-5 Freeway.

Learn about additional projects taking place 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.