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WHAT:

Demolition activity on the concrete barrier along the east side of the SR-55 bridge over MacArthur Boulevard is underway.

This work requires closing MacArthur under the freeway and closing the northbound and southbound loop on-ramps. The off-ramps and the straight on-ramps to SR-55 will remain open.

The contractor will require additional nights for the barrier demolition activities. The additional time will allow the work to be completed safely while ensuring daily road closure hours are not extended.

WHEN:

9 p.m. to 5 a.m. nightly, through Friday, Jan. 27 (into Saturday morning)

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

DETOURS:

Motorists will be detoured to use Red Hill Avenue, Dyer Road, and Main Street. For more information, visit the interactive Closures and Detours Map.

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.