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I-405 Improvement Project construction alert: Week of Sept. 7

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! Brookhurst Street Center Median Removal

Crews will remove the center median and restripe lanes on Brookhurst, between Slater Avenue and Talbert Avenue.

This work will require Brookhurst to be reduced to two lanes in each direction so crews can create a work zone for upcoming activities.

After lanes are restriped, southbound (SB) Brookhurst will be reduced to two lanes for approximately 1.5 months.

  • Crews will reduce Brookhurst to two lanes in each direction 10 p.m. Monday, Sept. 14, to 5 a.m. Tuesday, Sept. 15.
  • Median removal is scheduled for 7 a.m. to 4 p.m. for approximately 1.5 months on weekdays.

REMINDER! Northbound I-405 On-Ramp from Warner Avenue to Close for Approximately One Month

Crews will close the NB I-405 on-ramp from Warner for approximately one month to accommodate the freeway widening. Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving.

The ramp is set to close as early as 5 a.m. Wednesday, Sept. 16.

REMINDER! Northbound I-405 On-Ramp from Magnolia Street to Close for Approximately One Month

Crews will close the NB I-405 on-ramp from Magnolia for approximately one month to accommodate the freeway widening. Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving.

The ramp is set to close as early as 10 p.m. Thursday Sept. 17.

UPDATE! Northbound (NB) Full Freeway Closures for Bolsa Avenue Bridge Falsework Installation

Crews are constructing the falsework for the Bolsa bridge over NB I-405. This work requires full NB freeway closures between Beach Boulevard and McFadden Avenue.

Nightly closures are set to continue 11 p.m. to 5 a.m. Wednesday, Sept. 9, to Friday, Sept. 11.

UPDATE! Northbound (NB) Full Freeway Closures for Bushard Street Bridge Falsework Removal

Crews are removing the falsework for the Bushard Street bridge over NB I-405. This work will require full northbound (NB) freeway closures between Brookhurst Street and Warner Avenue.

Nightly closures are set to continue 11 p.m. to 5 a.m. Wednesday, Sept. 9, to Friday, Sept. 11.

REMINDER! Southbound I-405 Loop Off-Ramp to Westminster Boulevard is Closed for ONE YEAR

The southbound (SB) I-405 loop off-ramp to Westminster Boulevard is closed for approximately one year.

Activities include demolition, excavation, grading, drainage and electrical system installation, concrete pours and asphalt paving to accommodate the freeway widening.

REMINDER! Southbound I-405 Loop Off-Ramp to Beach Boulevard is PERMANENTLY CLOSED

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

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

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

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! Northbound (NB) and Southbound (SB) Euclid Street Intermittent Closures Are Set to Continue

Daytime and nighttime lane reductions are scheduled to continue on Euclid for construction of the widened freeway. Euclid will continue to be reduced to one lane in each direction between Pacific Street and Newhope Street, during the day and at night.

Northbound (NB) and southbound (SB) Euclid lane reductions will be scheduled intermittently 9 a.m. to 3 p.m. and 10 p.m. to 5 a.m. through Friday, Sept. 11.

Construction Activities

Fairview Road

UPDATE: Crews are installing pre-cast concrete girders and false deck for the Fairview Bridge over I-405.

Full freeway closures are set to continue on weeknights 11 p.m. to 5 a.m.

Some activity also may occur during the day.

UPDATE! Crews are installing piles for the foundation of a wall adjacent to the northbound I-405 on-ramp from Fairview.

  • Ongoing 7 a.m. to 4 p.m. for approximately one month on weekdays.

Santa Ana River

REMINDER! Crews are installing piles for the foundation of the walls along northbound I-405 between Harbor Boulevard/Hyland Avenue and the Santa Ana River, and along southbound I-405 adjacent to Moon Park.

  • Ongoing 7 a.m. to 4 p.m. for approximately three weeks on weekdays.

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.