featured graphic for I-405 Improvement Project after COVID-19. Logo courtesy of OCTA.

I-405 Improvement Project construction alert: Wednesday, December 29

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.

Si prefiere recibir información en español, por favor llame este numero 888-400-8994.

Nếu quý vị muốn nhận được thông tin này bằng tiếng Việt, xin vui lòng liên lạc với cô Lý Gia 888-662-6569.

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

Click to see closures and detours on the interactive map.

Happy New Year!

There will be no closures scheduled 1 p.m. Friday, December 31 to 10 p.m. Monday, January 3. No construction activities and closures on Friday, December 31. Construction activities will resume Monday, January 3.

REMINDER! Northbound (NB) Brookhurst I-405 On- and Off-Ramps to Close for Approximately Two Months

Crews will close the NB I-405 off-ramp to Brookhurst Street and the NB I-405 loop on-ramp from NB Brookhurst for approximately two months to accommodate the freeway widening.

The closures are anticipated as early as 10 p.m. Jan. 3. The ramps are scheduled to reopen in approximately two months.

UPDATE! Nightly Brookhurst Street Bridge and Ramp Closures for a Retaining Wall and Utility Work

Crews will close the Brookhurst Street bridge and ramps nightly, for retaining wall and utility work.

The nightly closures are anticipated to begin as early as Monday, Jan. 3, 10 p.m. to 5 a.m. for approximately three weeks, on weeknights.

Sign up for project-wide and bridge-specific construction alerts at bit.ly/405-signup.

REMINDER! Northbound (NB) I-405 Closure for K-rail Installation and Striping

The NB I-405 closure for k-rail installation and striping is scheduled for 11 p.m. Monday, Jan. 3, to 5 a.m. Tuesday, Jan. 4.

NB I-405 will be closed between Euclid Street/Ellis Avenue and Brookhurst Street.

NEW! Northbound (NB) I-405 Closure to Adjust Falsework for Goldenwest Street Bridge

Crews will adjust the falsework for the Goldenwest Street bridge over I-405.

This work will require a NB I-405 closures between the NB I-405 loop off-ramp to Bolsa Avenue and the NB I-405 loop on-ramp from Goldenwest.

The closure is set for 11 p.m. Monday, Jan. 3, to 5 a.m. Tuesday, Jan. 4.

NEW! Southbound (SB) I-405 Closure to Adjust Falsework for Goldenwest Street Bridge

Crews will adjust the falsework for the Goldenwest Street bridge over I-405.

This work will require a SB I-405 closure between Goldenwest and Bolsa Avenue.

The closure is set for 11 p.m. Tuesday, Jan. 4, to 5 a.m. Wednesday, Jan. 5.

UPDATE! Northbound (NB) I-405 Closures Continue for Westminster Boulevard Bridge Falsework Installation

Crews will continue installing the falsework for the Westminster Boulevard bridge over I-405.

This week’s NB I-405 closures are postponed due to the rain.

The 405 Community Outreach Team will provide update when the closures are rescheduled.

REMINDER! Southbound (SB) I-405 Loop Off-Ramp to Westminster Boulevard Extended Closure to CONTINUE

The closure of the SB I-405 loop off-ramp to eastbound Westminster Boulevard was extended for an additional three months.

This closure will keep traffic flowing in both lanes of the existing adjacent SB on-ramp and will accommodate bridge construction work.

The new ramp is now set to open in mid-January.

REMINDER! Westbound (WB) SR-22 On-Ramp from Old Ranch Parkway Closure to Extend for Approximately Three Months

Crews closed the Old Ranch Parkway on-ramp to WB SR-22 on April 13. The ramp will be closed for an additional three months due to unforeseen site conditions, to address complexities with traffic staging, and to accommodate the freeway widening.

The ramp is anticipated to reopen in spring 2022.

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

Este trabajo puede ser ruidoso. El horario está sujeto a cambios debido a las inclemencias del tiempo o problemas operativos imprevistos.

Xin lưu ý là công việc này có thể gây nên những tiếng động ồn ào. Lịch trình có thể thay đổi vì thời tiết xấu hoặc những yếu tố công tác không thể dự đoán.

Construction Activities

Almond Avenue

REMINDER! Crews are working on the foundation of a wall along northbound I-405, adjacent to Almond Avenue.

The foundation requires an additional 15 cast-in-drilled-hole (CIDH) piles. Crews will use an auger to drill large holes, install forms and steel cages and pour concrete into the holes to form the piles. The work is planned to begin on the north end of the wall and will proceed south.

Beginning as early as Monday, Dec. 27, 7 a.m. to 4 p.m. for approximately one week.

Crews may mobilize equipment as early as 6 a.m., and some activity may occur at night.

Please be advised that this work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

I-405/SR-73 HOV Connector

REMINDER! Crews are working on the foundation of the southbound (SB) I-405/SR-73 HOV connector bridge. The foundation consists of 8 cast-in-drilled hole (CIDH) and 35 steel pipe piles.

The CIDH activity includes installing large-diameter casings approximately 200 feet into the ground.

The steel pipe piles will be driven into the soil until reaching a hard layer of earth beneath the structure foundation.

Pile installation activities are ongoing and will continue 7 a.m. to 4 p.m. on weekdays and weekends, as needed, through Spring 2022.

Daytime and nighttime lane reductions on SB I-405, between SR-73 and Bear Street are anticipated to support the work.

Crews may mobilize equipment as early as 6 a.m., and some activities may occur from 9 p.m. to 6 a.m. as needed.

Please be advised that this work may be loud. The schedule is subject to change due to inclement weather or unforeseen operational issues.

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.