Haga clic aquí para ver esta informacíon en español.

Retaining Wall Concrete Pours

As crews continue constructing the new retaining wall along the southbound MacArthur Boulevard on-ramp, overnight concrete pours are planned on Tuesday, Sept. 24 and Saturday, Sept. 28 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.

Roadway Work

Since the MacArthur Boulevard bridge was reconstructed earlier this year, there has been significant roadway work that will be ongoing into 2025. These activities include electrical work for new traffic signals, installation or relocation of drainage facilities, as well as pavement work. 

MacArthur Boulevard will also include improvements with new sidewalks in certain areas and curb ramps that will be ADA compliant.

Extended Closure of Northbound SR-55 MacArthur Boulevard Off-Ramp

Crews will be pouring concrete on the northbound SR-55 MacArthur Boulevard

off-ramp, which will require an extended closure of the off-ramp. Once 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.

The off-ramp is expected to close as early as 9 p.m., Friday, Oct. 11 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.

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.