Construction Activities

Long-Term Closure of Southbound I-605 On-Ramp Beginning Monday, May 4

WHAT: Crews are expected to perform paving and striping activities on the southbound I-605 Katella Avenue loop on-ramp. This will require a 10-day closure of the on-ramp. Additional extended on-and-off-ramp closures at the interchange are expected through summer 2026. More information will be available once details are confirmed.

WHEN: The on-ramp is expected to close as soon as 9 p.m., Monday May 4 and reopen to motorists by 5 a.m., Friday, May 15.

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

Eastbound and Westbound Katella Avenue

Over the next few months, crews will be working behind k-rail on eastbound and westbound Katella Avenue between the I-605 freeway and Epson Way in preparation for the construction of a new sidewalk and bike lane. Work is expected to occur during both daytime and nighttime hours. Activities include excavation, base placement, curb and gutter installation, sidewalk construction, roadway paving, and electrical work.

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

Sidewalk Access

The sidewalks on both eastbound and westbound of Katella are under construction. Pedestrians can use a protected walkway on eastbound Katella, which will serve as a temporary pedestrian detour route.

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 May 4 include:

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

Rendering of Improvements along Katella Avenue

The rendering 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