Roadway Improvements & Traffic Advisories for February 26–March 5, 2025

City of Irvine sent this bulletin at 02/26/2025 07:30 PM PST
Roadway Improvements and Traffic Advisories

February 26–March 5, 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.

Nightly Closure: Southbound State Route 133 Connector to Northbound I-5

Overnight closures of the southbound State Route 133 connector to the northbound I-5 Freeway continue through Friday, February 28. The connector is fully closed:

  • Wednesday, February 26, and Thursday, February 27, 9 p.m. to 4 a.m. 
  • Friday, February 28, 9 p.m. to 7 a.m.

DETOUR: Turn right to take the on-ramp to southbound State Route 73. Exit on El Toro Road and turn right. Turn left to take the southbound Laguna Canyon Road.

Northbound MacArthur Boulevard On-Ramp Closure Extended

Crews will be removing and pouring concrete to reconstruct the northbound SR-55 MacArthur Boulevard straight on-ramp, which will require an extended closure of the ramp.

The on-ramp is expected to close as soon as Friday, February 28, at 5 a.m. and reopen to motorists by Monday, March 10, at 5 a.m.

San Diego Creek Bike Trail Under State Route 133 Reopened

The San Diego Creek Bike Trail under State Route 133 (SR-133) has reopened. This closure was necessary for the California Department of Transportation to safely complete the widening of the connector bridge from the southbound SR-133 to the northbound I-405 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.