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

I-405 Improvement Project construction alert: Wednesday, March 16

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.

CHECK IT OUT! INSIDE THE 405 SERIES

We are taking you Inside the 405 Project with our new video series highlighting the progress we’ve made. Throughout this series, we’ll be diving into how the 405 project started, what’s coming up, all the different ways our team helps you get where you need to go, working with our first responder partners, talking to diverse communities along the 16-mile project area, looking at future travel options in the 405 Express Lanes and working with local businesses through our 405 Forward Program.

We are excited to bring you along on this journey as we talk through all the progress we’ve made on the 405 Project!

NEW! Northbound (NB) I-405 Closures to Install Falsework for the Warner Avenue Bridge

Crews are installing falsework for the Warner Avenue bridge over I-405 using freeway lane reductions.

This work will also require nightly NB I-405 closures between the NB I-405 off-ramp to Euclid Street and the NB I-405 loop on-ramp from Magnolia Street.

Nightly NB I-405 closures are scheduled for Monday through Friday, beginning as early as Monday, March 21. Closures will be scheduled 11 p.m. to 5 a.m. Monday through Thursdays, and 11 p.m. to 6 a.m. on Fridays.

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

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

NEW! Northbound (NB) Harbor Boulevard Closures for Column Work

Crews are constructing columns, excavating and placing concrete for the I-405 bridge over Harbor Boulevard.

This work will require lane reductions on Harbor beginning as early as Monday, March 21, 11 p.m. to 5 a.m. for approximately one week.

This work will also require nightly NB Harbor closures between South Coast Drive and Gisler Avenue beginning as early as Monday, March 28, 11 p.m. to 6 a.m. for approximately two weeks on weeknights.

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

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

COMING SOON! Northbound (NB) I-405 On-Ramp from Fairview Road to Close for Approximately One Month

Crews will close the NB I-405 on-ramp from Fairview Road for approximately one month to accommodate the freeway widening. The closure is anticipated for mid-April.

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

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

COMING SOON! Southbound (SB) I-405 Off-Ramp to Fairview Road to Close for Approximately One Month

Crews will close the SB I-405 off-ramp to Fairview Road for approximately one month to accommodate the freeway widening. The closure is anticipated for mid-April.

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

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

COMING SOON! Northbound (NB) I-405 Loop On-Ramp from Seal Beach Boulevard to Close for Approximately One Month

Crews will close the NB I-405 loop on-ramp from Seal Beach Boulevard for approximately one month to accommodate the freeway widening. The closure is anticipated in mid-to late April.

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

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

COMING SOON! Full Beach Boulevard Closure for Utility Work and Striping

Crews will activate the traffic signal at the intersection of the northbound (NB) I-405 straight off-ramp to Beach Boulevard as well as restripe lanes. This work will require a full closure on Beach between McFadden Avenue and Edinger Avenue.

The closure is anticipated for late March.

The NB loop off-ramp to Beach will also be permanently closed in late March.

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

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

REMINDER! SBBrookhurst Street Closures to Install Drainage and Remove Shoring

Crews are installing drainage and removing shoring from the Brookhurst Street bridge over I-405. This work requires southbound (SB) Brookhurst closures on the bridge.

Nightly SB Brookhurst closures are also scheduled for 10 p.m. to 5 a.m. through Friday, March 18.

REMINDER! Southbound (SB) I-405 Goldenwest Street On-Ramp and Bolsa Avenue Off-Ramp Closed

Crews closed the SB I-405 loop off-ramp to Bolsa Avenue and the SB I-405 loop on-ramp from Goldenwest Street to accommodate the freeway widening.

The SB I-405 loop off-ramp to Bolsa closed on Saturday, March 12, and is anticipated to reopen in approximately two months.

The SB I-405 loop on-ramp from Goldenwest closed on Saturday, March 12, and is anticipated to reopen in approximately four months.

REMINDER! Southbound Loop On-Ramp from Brookhurst Street Closed for Approximately Six Weeks

Crews closed the SB I-405 loop on-ramp from Brookhurst Street closed on Monday, March 14, to accommodate the freeway widening.

The ramp is anticipated to reopen after approximately six weeks.

REMINDER! Northbound I-405 Warner Avenue On- and Off-Ramps Closed for Approximately 45 Days

Crews closed the NB I-405 on-ramp from Warner Avenue and the NB I-405 loop off-ramp to Warner on Wednesday, Feb. 23, to accommodate the freeway widening.

The ramp is anticipated to reopen after approximately three more weeks.

REMINDER! Southbound (SB) I-405 Closures for SB I-405/SR-73 Connector to Continue

Crews will close SB I-405 between the SB I-405 off-ramp to Harbor Boulevard and the SB I-405 on-ramp from Bristol Street to install the falsework for the SB I-405/SR-73 connector bridge.

The nightly SB I-405 closures are ongoing 11 p.m. to 5 a.m. through Saturday, March 25. Closures are set for Mondays to Thursdays from 11 p.m. to 5 a.m. and Fridays and Saturdays, as needed, from 11 p.m. to 6 a.m.

REMINDER! Southbound I-405 Off-Ramp to Goldenwest Street/Westminster Mall Road Closed for Approximately Six Weeks

Crews closed the southbound (SB) I-405 off-ramp to Goldenwest Street/Westminster Mall Road on Monday, Jan. 31, to accommodate the freeway widening.

The ramp is anticipated to reopen at 5 a.m. Monday, March 13.

REMINDER! Westbound (WB) SR-22 On-Ramp from Old Ranch Parkway Closure

Crews closed the Old Ranch Parkway on-ramp to WB SR-22 on April 13, 2021.

The ramp is anticipated to reopen in spring 2022.

NOW OPEN! Southbound I-405 Off-Ramp to Goldenwest Street/Westminster Mall Road

Southbound I-405 Off-Ramp to Goldenwest Street/Westminster Mall Road is now open.

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 constructing the sound walls along northbound I-405, adjacent to Almond Avenue. The block portion of the wall is anticipated to start construction in spring 2022.

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.

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

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

Bolsa Avenue

REMINDER! Crews are constructing the sound wall along southbound (SB) I-405, between the Bolsa Avenue bridge and the railroad.

Activities include soil backfill and compaction, placing concrete forms, and pouring concrete.

Construction is ongoing, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed for approximately one week.

This work will also include intermittent nighttime lane reductions on SB I-405, between Bolsa Avenue and McFadden Avenue.

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.

Newland Street

UPDATE! Crews will begin demolishing the concrete barrier and columns from the old Newland Street bridge in the center median of the freeway.

The work has been rescheduled to begin as early as Thursday, March 17, 7 a.m. to 4 p.m. for approximately one more week on weekdays.

Intermittent nighttime lane reductions on I-405 are also anticipated for this 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.

Heil Avenue

REMINDER! Crews will install piles for the foundation of a sound wall along southbound (SB) I-405, adjacent to homes that are near the Heil Avenue pedestrian bridge.

The foundation consists of 42 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.

Following these activities, crews will begin constructing the footing, placing rebar, and pouring concrete to construct the wall.

The pile installation is ongoing, 7 a.m. to 4 p.m. for approximately one more week on weekdays, and Saturdays, as needed.

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.

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.