Construction Activities

Upcoming Nighttime Closures on Northbound I-605 Katella Avenue On-Ramp and Mainline

Nightly closures of the northbound I-605 Katella Avenue on-ramp and mainline are currently in place and expected to last through Friday, Jan. 23, from 9 p.m. to 5 a.m. At least two lanes on the mainline will remain open to traffic at all times. Work may include restriping, k-rail placement, saw cutting and guardrail removal.

This work is needed to accommodate a new traffic alignment and create space for construction of a Mechanically Stabilized Earth (MSE) wall along the ramp. Motorists may notice minor traffic shifts once this work is completed. Additional updates will be shared in future communications.

Northbound I-605 Katella Avenue On-Ramp Detour Map

Construction activities may be loud. Schedules are subject to change due to weather or unforeseen conditions.

Sidewalk Access

While 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.

Click the image below to view a larger version of the pedestrian detour.

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

Closures and Detours

Please plan ahead and expect delays during these times. Nighttime closures typically occur between 9 p.m. to 5 a.m. Specific closures for the week of Jan. 19 include:

• Outside lanes on eastbound and westbound Katella Avenue/Willow Street, at least one lane will be open to traffic at all times
• I-605 at Katella Avenue/Willow Street; at least two lanes 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

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