OCTA, in cooperation with Caltrans, is improving the local interchange at Interstate 605 and Katella Avenue to improve mobility, smooth traffic flow, and enhance pedestrian and bicycle facilities.

Construction Activities

Katella Avenue Construction Updates – Plan Ahead, Expect Delays

Construction is underway and generally occurs Monday through Friday, from 6 a.m. to 4 p.m. Intermittent night work from 9 p.m. to 5 a.m. may be required for certain activities.

Westbound Katella Avenue Activities
Crews have completed the demolition of the sidewalk and are now relocating utilities on the westbound side of Katella Avenue. This work is slated to continue for several months before the sidewalk is reconstructed later this year.

Motorist should be advised that the outside lane on westbound Katella Avenue requires them to enter the 605 north on-ramp. Additional, signs have been placed to direct motorist to the on-ramp .

Eastbound Katella Avenue Activities

Contractors are planning to install temporary concrete barriers, which would reduce eastbound Katella to one lane. Following this activity, crews will demolish the sidewalk to accommodate the new bike lane.  Additional information, including pedestrian detours, will be available soon.

Sidewalk Access

Sidewalk access on westbound Katella is closed. Signs are in place detouring pedestrians and cyclist to use the sidewalk on eastbound Katella Avenue, which will be maintained during construction.

Closures and Detours

Please plan ahead and expect delays during these times. Nighttime closures typically occur between 9 p.m. to 7 a.m. Specific closures for the week of Sept. 15 include:

• Outside lanes on eastbound and westbound Katella Avenue/Willow Street, at least one lane will be open to traffic at all times
• Northbound I-605 on-ramp from eastbound/westbound Katella Avenue - click here to view detour
• Northbound I-605 loop and straight off-ramps to eastbound and westbound Katella Avenue - click here to view detour
• Southbound I-605 loop off-ramp to eastbound Katella Avenue - click here to view detour
• Southbound I-605 loop and straight on-ramps from Katella Avenue - click here to view detour

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

Rendering of Improvements along Katella Avenue

The rendering above highlights planned improvements along Katella Avenue between Coyote Creek Channel and Epson Way. Key features include:

• Reconfiguration of the northbound on- and off-ramps into a T-intersection
• Addition of Class II bike lanes with hatched markings to indicate bike lane transitions
• Installation of a new traffic signal at the northbound I-605/Katella Avenue off-ramp, along with upgraded signals at nearby intersections
• Painted crosswalks and newly constructed sidewalks to enhance pedestrian access and safety

Community Outreach

As part of its comprehensive public awareness campaign, the Public Outreach team is offering opportunities for the community to learn more about the project, its benefits, construction activities, and potential impacts. These include:

• Public webinars
• Neighborhood meetings
• Project briefings and presentations
• Project booths at community events

Construction Closures & Detours