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WHAT:

Crews will be pouring concrete on the northbound SR-55 MacArthur Boulevard off-ramp, which will require an extended closure of the off-ramp.

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.

During the closure, motorists will be detoured to the northbound SR-55 Dyer Road exit and then to Red Hill Avenue. Use of alternate routes via I-405 is encouraged. For specific detour information, visit the Closures and Detours map.

WHEN:

The off-ramp is expected to close tonight at 9 p.m., and reopen to motorists by 5 a.m., Monday, Oct. 21.

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

Closure and Detour Map.

Temporary Lane Configuration After Extended Closure.

As crews continue constructing the new retaining wall along the southbound MacArthur Boulevard on-ramp, overnight concrete pours are planned on Tuesday, Oct. 15 and Saturday, Oct. 19 from midnight to 5 a.m.

This work will require closing the southbound MacArthur Boulevard straight and loop on-ramps, as well as one outside lane on southbound SR-55 at MacArthur.

Job site maintenance is important for safety and aesthetics, as well as compliance with regulatory and environmental standards. 

Crews continue efforts to keep the corridor clean by removing weeds, picking up trash, and removing graffiti. In addition, contractors perform “freeway sweeps” along the center median and outside lanes of the freeway.

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.

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.