Week of Oct. 19, 2026

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Construction Updates

Retaining Wall Construction

Crews continue construction of one of the retaining walls along eastbound Katella Avenue near the Coyote Creek Channel. Work includes excavation, reinforcing steel installation and concrete barrier preparation.

Eastbound and Westbound Katella Avenue

The eastbound sidewalk will remain closed. To access the westbound sidewalk, pedestrians should cross at Walnut Street.

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

Click here to view a full-size pedestrian detour map

Upcoming Closures

The following closures may take place nightly from 9 p.m. to 7 a.m., Monday, Oct. 19 through Friday, Oct. 23 (into Saturday morning):

Outside lanes on eastbound and westbound Katella Avenue/Willow Street, at least one lane will be open to traffic at all times.

Outside lane on northbound I-605 at Katella Avenue/Willow Street, at least three lanes will remain open to traffic at all times.

Northbound I-605 loop and straight off-ramps to eastbound and westbound Katella Avenue - click here to view detour

Southbound I-605 straight on-ramp from Katella Avenue - click here to view detour

Southbound I-605 loop off-ramp to eastbound Katella Avenue - click here to view detour.

Closures and Detours Map

An interactive "Closures and Detours Map" is updated regularly highlighting major activities and associated closures and detours. We encourage users to bookmark the link for quick access to real-time construction information. Click on the image to be redirected.

About the Project

The Orange County Transportation Authority (OCTA), in cooperation with Caltrans, is improving the local interchange at Interstate 605 (I-605) and Katella Avenue. The project will enhance safety and traffic flow by modifying existing on- and off-ramps, making improvements on Katella Avenue, and improving bicycle and pedestrian facilities.

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octa.net/605Katella | 888-200-3302 | 605KatellaInfo@octa.net | @605Katella

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