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WHAT:

Crews are expected to reconstruct the southbound SR-55 MacArthur Boulevard off-ramp, which will require an extended closure of the ramp.

WHEN:

The off-ramp is expected to close as soon as 10 p.m., Tuesday, Sept. 9 and reopen to motorists by 5 a.m., Friday, Sept. 19.

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

Join us at Fiesta Latina en Irvine on Sunday, Sept. 14 from 11 a.m. to 4 p.m. at Great Park!

This free cultural event will include education, entertainment, crafts, vendors, food trucks, food and art demonstrations, as well as a pop-up art exhibition.

Click here for more information.

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.