Road Construction & Improvement Projects

October 2-9, 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.

Trabuco Road Improvements

Work will be done 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 final paving, striping, and utility and traffic signal adjustments. 

Work began Monday, September 30, and will be complete Tuesday, November 5, weather permitting. The project will be worked on from 9 a.m. to 3 p.m. Work will be done entirely behind lane closures, taking place 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 take place 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. 

Northbound State Route 55 MacArthur Boulevard Off-Ramp Closure

Concrete will be poured on the northbound State Route 55 (SR-55) MacArthur Boulevard off-ramp, which will close the off-ramp Friday, October 11, at 9 p.m. to Monday, October 21, at 5 a.m. 

When the off-ramp reopens, it will be temporarily restriped to include one left-turn and one right-turn lane at the MacArthur intersection. The single lane off-ramp for eastbound MacArthur will be permanently eliminated. In its final configuration, the off-ramp will include four lanes at the MacArthur intersection – two left-turn lanes and two right-turn lanes, as well as a new traffic signal. 

The work will be loud and is scheduled to change due to inclement weather. Please visit the Orange County Transportation Authority's website for more information. 

State Route 241 Pavement Repair Project and Closure

Overnight closures will take place on State Route 241 (SR-241) through Friday, October 4, from 10 p.m. to 5 a.m. to repair pavement. 

Closures for October 1-2:

• Northbound SR-241 closed between State Route 133 (SR-133) and State Route 261 (SR-261)/Santiago Canyon Road split from 10 p.m. until 5 a.m. 

Detour Information:

• For northbound SR-241: Exit northbound SR-241 at Portola Parkway; turn left onto Portola Parkway; take Portola Parkway to SR-261; turn right for northbound SR-261/SR-241 or turn left onto southbound SR-261. 
• For northbound SR-133 to northbound SR-241: Exit SR-133 at Irvine Boulevard. Turn left onto Irvine Boulevard. Turn right onto Sand Canyon Avenue. Turn left on Portola Parkway. Take northbound SR-261 on-ramp from Portola Parkway to northbound SR-241.

133 Toll Road Closures

The southbound 133 Toll Road connector to northbound I-5 Freeway will be fully closed through Friday, October 4, from 10 p.m. to 5 a.m. for miscellaneous work. 

Detour: Exit on Irvine Boulevard and turn right. Turn left onto Sand Canyon Avenue and continue straight. Turn right to take Irvine Center Drive. Continue on Irvine Center Drive to Culver Drive. Turn right to take Culver Drive to 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.