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WHAT:

Crews are expected to reconstruct the northbound SR-55 Dyer Road straight on-ramp, which will require an extended closure of the ramp.

WHEN:

The on-ramp is expected to close as soon as 9 p.m., Monday, Oct. 13 and reopen to motorists by 5 a.m., Thursday, Oct. 23.

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

Crews are expected to reconstruct the northbound SR-55 Dyer Road loop

on-ramp, which will require a 30-day closure of the ramp. Additional information will be provided in future communications.

Construction of the 3,139-foot-long Lane Channel was completed last month after being demolished in Spring 2023. Crews will continue with fence work and perform cleanup efforts along the channel.

This milestone required tremendous effort from construction crews and included activities such as installing and removing temporary shoring beams, excavation, backfilling, and concrete pours. Previously a V-shape channel, the new U-shape configuration was designed to withstand a 100-year storm while increasing stormwater capacity.

Fun fact: Seventy-six tons of concrete and 703 tons of steel were used to reconstruct this structure along southbound SR-55.

Stay in the know, and visit octa.net/55Construction to stay informed on construction progress.

Lane Channel before demolition and reconstruction.

Shoring Installation.

Lane Channel Concrete Pour.

Reconstructed Lane Channel as of September 2025.

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.