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WHAT:

Crews are in the process of constructing a new retaining wall along the southbound SR-55 MacArthur Boulevard on-ramp. Overnight concrete pours several times a week are underway and requires closure of the MacArthur Boulevard straight on-ramp, as well as two outside lanes on southbound SR-55.

Visit the Closures and Detours map for quick access to real-time construction activities and closures.

WHEN:

Concrete pours are expected to occur weeknights from 9 p.m. to 5 a.m., through the end of August.

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

Crews continue to remove vegetation and weeds along the project corridor, as well as ensure local streets are maintained for pedestrians and motorists.

Help keep Orange County clean! Please report graffiti and trash along the corridor to the Outreach Team at 888-371-2555 or email SR55Info@octa.net.

Thank you to everyone who stopped by our booth at the Santa Ana PD National Night Out event!

Look for the SR-55 outreach team at a community event near you this summer! Stay in the know by signing up for weekly construction updates here.

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.