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

Construction is underway and generally occurs on weekdays. Crews are anticipated to perform the following daytime and nighttime activities listed below.

Nighttime activities are slated to begin following the Fourth of July holiday to minimize public impacts when lane reductions and ramp closures are required for crews to safely perform the work. These nighttime activities are expected to continue through the end of July. Check back soon for a list of specific ramp closures.

Daytime Work (6 a.m. to 4 p.m.)

• Install construction signs
• Remove vegetation
• Relocate utilities

Nighttime Work (9 p.m. to 5 a.m.)

• Install temporary concrete barriers to create a safe work zone
• Restripe Katella Avenue, shifting traffic to the outside lanes
• Demolish and reconstruct the center median on Katella Avenue/Willow Street beneath the freeway

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

The Outreach team is participating in the City of Los Alamitos’ Concerts in the Park on Thursday, July 17 from 6:30-8 p.m. at 4000 Farquhar Avenue. We encourage you to stop by to learn more and ask questions.

Construction Closures & Detours