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I-405 Improvement Project construction alert: Week of July 27

For more information about this project, please contact the 405 Community Outreach Team at [email protected] or 888-400-8994, or visit octa.net/405improvement.

To view and print a detailed list of closures and detours CLICK HERE!

Click to see closures and detours on the interactive map.

UPDATE! Southbound I-405 loop off-ramp to Beach Boulevard to PERMANENTLY CLOSE

The SB I-405 loop off-ramp to NB Beach Boulevard is anticipated to permanently close in mid-August. Motorists will use the Beach Boulevard/Center Avenue off-ramp from now on to access NB and SB Beach Boulevard.

The loop off-ramp is being eliminated to accommodate the widening of Beach Boulevard and of the freeway. The Beach Boulevard/Center Avenue off-ramp and Center Avenue are being reconstructed to accommodate the change in traffic volume.

The 405 Community Outreach Team will provide detailed schedule information in future alerts.

COMING SOON! Southbound I-405 Loop Off-Ramp to Westminster Boulevard to close for ONE YEAR

The SB I-405 loop off-ramp to Westminster will close for approximately one year. The ramp is being reconstructed as part of the freeway widening.

The closure is set for 7 a.m. Aug. 17.

Crews built a temporary traffic signal for the southbound I-405 off-ramp to Springdale Street. It is anticipated that the signal will be turned on the morning of Tuesday, Aug. 11.

UPDATE! Heil Avenue Pedestrian Bridge to Close

Crews will close the Heil pedestrian bridge in mid-August to support the freeway widening. The bridge will be demolished and reconstructed.

The 405 Community Outreach Team will provide detailed schedule and closure information in future alerts.

REMINDER! Daytime Closures are set for Harbor Boulevard Pile Driving Activities

Daytime ramp closures and lane reductions on Harbor are set for early August so crews can continue pile driving activities. This work will support the construction of the widened freeway bridge over Harbor.

The 405 Community Outreach Team will provide detailed schedule and closure information in future alerts.

NEW! Northbound (NB) Beach Boulevard Closures for Pavement Operations

Crews began paving activities on Beach Boulevard. This activity will require a full northbound (NB) Beach Boulevard closure between Edinger Avenue and McFadden Avenue and freeway ramp closures. This work will continue to take place nightly from 11 p.m. to 5 a.m. through Friday, July 31.

REMINDER! Northbound Beach Boulevard Freeway Ramps Closed for ONE MONTH

Crews closed the northbound (NB) loop on-ramp to NB I-405 and the NB I-405 off-ramp to NB Beach. The ramps will be closed for approximately one month to accommodate the freeway widening. The ramps are scheduled to reopen in mid-August.

Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving.

REMINDER! Northbound (NB) and Southbound (SB) Euclid Street intermittent closures are set to continue

Northbound and southbound Euclid lane reductions and directional closures will be scheduled intermittently 9 a.m. to 4 p.m. and 10 p.m. to 5 a.m. through July 31.

UPDATE! Northbound (NB) I-405 full freeway closures for Talbert Avenue bridge falsework construction

Crews are constructing the falsework for the Talbert bridge over NB I-405.

This work requires full NB freeway closures between Euclid Street and Brookhurst Street.

The closures are set for 10 p.m. to 5:30 a.m. and will continue through Friday, Aug. 7, on weeknights

REMINDER! NB I-405 loop off-ramp to Westminster Boulevard closed for ONE YEAR

Crews closed the NB I-405 loop off-ramp to Westminster Boulevard. The ramp will be closed for approximately 12 months to allow construction of new walls and ramps at this location in one stage, eliminating multiple traffic shifts and confusion for motorists.

REMINDER! NB I-405 Loop On-ramp from Goldenwest Street is closed for approximately THREE MONTHS

The NB I-405 loop on-ramp from Goldenwest Street is closed for approximately three months. The ramp is being reconstructed as part of the freeway widening.

The ramp is scheduled to reopen Oct. 2.

Construction Activities

Goldenwest Street

UPDATE! Crews will continue demolishing the east side of the Goldenwest bridge over I-405.

  • Ongoing, 10 p.m. to 5 a.m. for approximately three more weeks
  • Some daytime demolition also is anticipated.

Navy Railroad

UPDATE! Crews are installing piles for the foundation of the freeway bridge over the railroad near the Westminster Mall.

  • Ongoing, 7 a.m. to 4 p.m. for approximately two more weeks

East Garden Grove Channel

UPDATE! Crews are continuing construction on the East Garden Grove Channel near the Newland Avenue bridge.
Activities include installing shoring by vibrating in steel beams, excavation, demolishing concrete and hauling materials.
Crews will also begin pile driving for the widened I-405 bridge over the channel.

  • Ongoing, 7 a.m. to 4 p.m. for approximately one month
  • Crews may mobilize equipment as early as 6 a.m.
  • Some activities, such as hauling materials, may occur at night

The duration of this work may change depending on site conditions. Please be advised that this work may be loud. Dates and times are subject to change due to unforeseen operational factors or inclement weather.

This article was released by the Orange County Transportation Authority.