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I-405 Improvement Project construction alert: Week of September 2

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.

Happy Labor Day Weekend! In an effort to ease holiday travel, there will be no closures scheduled over the Labor Day weekend, starting on Friday, Sep. 4. Construction activities will resume on Tuesday, Sep. 8.

COMING SOON! 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 10 p.m. Tuesday, Sept. 15.

COMING SOON! 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.

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.

UPDATE! Fairview Road Bridge Girder Placement

Crews are installing pre-cast concrete girders 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.

NEW! McFadden Avenue 24-Hour Closure

Crews will repave McFadden Avenue to prepare for the reopening of the bridge. Activities include removing the existing roadway and replacing it with new asphalt. This work will require a 24-hour closure of McFadden between Sugar Drive and Beach Boulevard.

Residential access will be maintained. Crews will also repave the road near Gothard Street.

The closure is set to begin as early as 5 a.m. Tuesday, Sept. 8, to 5 a.m. Wednesday, Sept. 9.

NEW! Center Avenue Full Closure

Crews are scheduled to close Center Avenue to remove an overhead sign structure. This activity will require a full closure of Center between Beach Boulevard and Huntington Village Lane. The I-405 southbound (SB) beach off-ramp and on-ramp also will be closed.

Nightly closure is set for 10 p.m. Thursday, Sept. 3, to 5 a.m., Friday, Sept. 4.

COMING SOON! Brookhurst Street Median Removal

Crews will remove the center median on Brookhurst Street between Talbert Avenue and Slater Avenue. This work will require intermittent lane reductions.

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

UPDATE! Southbound (SB) Full Freeway Closures for Bolsa Avenue Bridge Falsework Installation

Crews are constructing the falsework for the Bolsa bridge over SB I-405. This work require a full SB freeway closures between Goldenwest Street and Bolsa.

The closure is set to continue 11 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4.

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.

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

UPDATE! Southbound (SB) Full Freeway Closures for Bushard Street Bridge Falsework Removal

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

The closure is set to continue 11 p.m. Wednesday, Sept. 2, to 5 a.m. Thursday, Sept. 3.

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

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

The closures are set to begin 11 p.m. to 5 a.m. Thursday, Sept. 3.

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. through Friday, Sept. 4.

Construction Activities

Fairview Road

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.

2 Comments

  1. I used to receive alerts about closures of the 405 freeway on my cell phone, but did not receive one for the closure that happened this last Sunday, August 30. Is there any way I can sign up to get that service again? It seems to have disappeared from my phone.
    Thanks!!

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