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 Monday through Friday, from 6 a.m. to 4 p.m.

Center Median Reconstruction

Nighttime work for the reconstruction of the center median that is east of the Coyote Creek Channel is expected to continue through the end of August. Crews will continue concrete work for the curb of the new median.

Vegetation Removal

Crews will continue nighttime vegetation removal until mid-August. Next week, work will focus on clearing vegetation near the northbound I-605 on-ramp. This will necessitate closing the outside lanes of northbound I-605, as well as the on-ramp, nightly from 9 p.m. to 5 a.m., starting Monday, August 4, through Friday, August 8 (extending into early Saturday morning).

Additionally, several trees that interfere with planned improvements along westbound Katella Avenue are scheduled for removal in mid-August. Further details regarding any impacts from this work will be provided in the coming week.

These activities will require the following closures as early as 9 p.m. to 5 a.m., Monday, Aug. 4 through Friday Aug. 8 (into Saturday morning)

• Inside lane on eastbound and westbound Katella Avenue/Willow Street, at least one lane will be open to traffic at all times
• Two outside lanes on northbound I-605 at 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
• Southbound I-605 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

Construction Safety Zone Reminder

As the new school year approaches, it’s crucial for drivers, parents, and students to remain vigilant around construction zones. Here are some important reminders to help ensure everyone travels safely to and from school:

Intermittent On- and Off- Ramp Closures

The following ramps are expected to be intermittingly closed this month from 9 p.m. to 5 a.m. nightly. Certain ramps may reopen earlier as crews complete work in certain areas.

Closure: Northbound I-605 Off-Ramp to Eastbound Katella Avenue

Closure: Northbound I-605 Loop Off-Ramp to Westbound Katella Avenue

Closure: Southbound I-605 Loop Off-Ramp to Eastbound Katella Avenue

Closure: Southbound I-605 Loop On-Ramp from Eastbound Katella Avenue

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