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A new retaining wall is being constructed along the MacArthur Boulevard on-ramp to southbound

SR-55. Contractors have removed a majority of the old retaining wall and have successfully poured the foundation for half of the new wall. Work on the new retaining wall along the MacArthur Boulevard

on-ramp to southbound SR-55 is expected to continue through fall 2024.

WHAT:

Contractors are expected to continue the installation of temporary shoring at the southern end of the Lane Channel, north of MacArthur Boulevard. Businesses adjacent to this work may be impacted by noise and vibration.

WHEN: 

Shoring activity will continue from 6 a.m. to 5 p.m., Monday through Friday, through July.

This work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

The City of Santa Ana is hosting a series of Concerts in the Park with food trucks, music, and fun for the family! 

Stop by the SR-55 Improvement Project booth on Thursday, July 18 from 6 to

8:30 p.m. at Thornton Park to learn about construction activities, sign up for project alerts, and pick up one of our project-branded freebies!

Bookmark the closures and detours map for quick access to real-time construction information. Click on the construction icons to view activities and closures.

OCTA, in cooperation with Caltrans, is improving 4 miles of SR-55 between I-405 and I-5. The project will improve traffic flow and reduce travel time by adding one regular lane and one carpool lane in each direction. Also, the project will add merge lanes between several interchanges and stripe carpool lanes for continuous access, augmenting safety on the freeway by making merging easier. These enhancements are expected to create a better, smoother driving experience for motorists.