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Work is underway to reconstruct the northbound SR-55 MacArthur Boulevard straight on-ramp, which requires an extended closure of the ramp. The on-ramp is expected to reopen to motorists on Monday, March 10.

Over the weekend, crews are expected to replace the pavement of the outside lane on northbound SR-55 between MacArthur Boulevard and Dyer Road. This work requires an extended closure of the outside lane, from 9 p.m. Friday, March 7 to 5 a.m. Monday, March 10.

Crews are expected to complete pavement replacement of the outside lane on northbound SR-55 between MacArthur Boulevard and Dyer Road, as well as along the northbound Dyer Road off-ramp.

This work will require an extended closure of the outside lane on northbound SR-55, as well as the Dyer Road off-ramp, from 9 p.m. Friday, March 14 to 5 a.m. Monday, March 17.

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.