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

I-405 Improvement Project construction alert: Wednesday, March 30

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.

REMINDER! New Features for Beach Boulevard

The northbound (NB) I-405 straight off-ramp to Beach Boulevard will have a new traffic signal! The ramp will also be updated with five lanes including two dedicated right-turn and two dedicated left-turn lanes, as well as a shared lane for both right and left-turn movements.

As part of the final design for the intersection, the NB I-405 loop off-ramp will be permanently eliminated.

This work will be done using a full Beach Boulevard closure between McFadden Avenue and Edinger Avenue. Details for the closure are below.

Crews will close Beach Boulevard between McFadden Avenue and Center Avenue to activate the traffic signal for the NB I-405 off-ramp to Beach Boulevard and to perform restriping activities.

The closure is anticipated for 11 p.m. March 30, to 5 a.m. Thursday, March 31.

The permanent ramp closure of the NB loop off-ramp to Beach is also set for 11 p.m. March 30.

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

REMINDER! Northbound and Southbound I-405 Closures to Install Girders for the Ward Street Bridge

Crews will install pre-cast concrete girders for the Ward bridge over I-405.

The girders are the main horizontal support beams, known as the superstructure, for the new bridge. They are installed across the bridge’s substructure, the abutments and center columns.

This work will require a NB I-405 closure between the NB I-405 off-ramp to Euclid Street and the NB I-405 loop on-ramp from Brookhurst Street and a SB I-405 closure between the SB I-405 off-ramp to Warner Avenue and the SB I-405 on-ramp from Euclid/Ellis Avenue.

The closures are anticipated for:

  • Night One: As early as 10:30 p.m. Friday, April 1, to 7:30 a.m. Saturday, April 2 – NB I-405 will be closed.
  • Night Two: As early as 11 p.m. Saturday, April 2, to 8 a.m. Sunday, April 3 – SB I-405 will be closed.

Some ramps may also be closed.

Crews may close NB or SB I-405 on the night of Monday, April 4, if work isn’t completed over the weekend.

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

NEW! Southbound (SB) I-405 Closures to Remove Falsework from the Goldenwest Street Bridge

Crews will remove the falsework from the Goldenwest Street bridge over I-405. This will require nightly SB I-405 closures between the SB I-405 off-ramp to Westminster Mall Road/Goldenwest Street and the SB I-405 on-ramp from Center Avenue.

The falsework removal will also require Goldenwest bridge closures.

Nightly SB I-405 closures are anticipated to begin Monday, April 4,and will occur Monday through Friday. Closures will be scheduled 11 p.m. to 5 a.m. Monday through Thursday, and 11 p.m. to 6 a.m. on Friday.

The bridge closures will be scheduled 9 p.m. to 5 a.m.:

  • Thursday, April 7
  • Friday, April 8
  • Thursday, April 14
  • Friday, April 15

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

UPDATE! Southbound (SB) I-405 Closures to Install Warner Avenue Bridge Falsework

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

This work requires nightly SB I-405 closures between the SB I-405 off-ramp to Magnolia Street and the SB I-405 on-ramp from Talbert Avenue.

Nightly SB I-405 closures are ongoing Monday through Friday. Closures will be scheduled 11 p.m. to 5 a.m. Monday through Thursday, and 11 p.m. to 6 a.m. on Friday.

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

UPDATE! Northbound (NB) I-405 Closures to Install Falsework for the NB I-405/SR-73 Connector

Crews are installing falsework for the NB I-405/SR-73 connector bridge.

This work will require nightly NB I-405 closures between the NB I-405 off-ramp to S. Coast Drive and the NB I-405 on-ramp from Hyland Avenue.

Nightly NB I-405 closures are anticipated to begin March 30, and will occur Monday through Friday. Closures will be scheduled 11 p.m. to 5 a.m. Monday through Thursdays, and 11 p.m. to 6 a.m. on Fridays.

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 late April.

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

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.

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.

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.

REMINDER! Southbound I-405 Loop On-Ramp from Brookhurst Street Closed for Approximately Six Weeks

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

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

REMINDER! Southbound I-405 Off-Ramp from Brookhurst Street Closed for Approximately Six Weeks

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

The ramp is anticipated to reopen after approximately three more 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 one more week.

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.

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

North Gate Road

REMINDER! Crews are installing piles for the foundation of the sound wall along southbound I-405, adjacent to North Gate Road.

Pile installation will continue as early as Thursday,
March 31, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed for approximately two weeks.

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.

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.

Springdale Street

NEW! Crews will begin installing piles for the foundation of the outside abutments for the Springdale Street bridge over I-405. The foundation consists of 226 piles.

Pile installation activities are anticipated to begin as early as Wednesday, April 6, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed for approximately six weeks.

This work will also include intermittent nighttime lane reductions on Springdale and Westminster.

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.

Springdale Street

REMINDER! Crews are constructing a temporary traffic signal at the Westminster Boulevard/Springdale Street intersection as part of the bridges’ reconstruction.

Activities include installing temporary wooden poles, concrete removal and restoration, permanent pole foundation work, as well as electrical work. After the temporary signal is complete, crews will begin construction of the permanent traffic signal.

Construction of the temporary signal is ongoing, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed for approximately three months.

This work will also include intermittent nighttime lane reductions on Springdale and Westminster.

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.

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

NEW! Crews will continue installing piles for the foundation of the Newland Street bridge over I-405.

The foundation consists of three large diameter 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.

Pile installation activities are anticipated to begin as early as Thursday, April 7, 7 a.m. to 4 p.m., for approximately one month, on weekdays and Saturdays as needed.

This work may also include intermittent nighttime lane reductions on northbound and southbound I-405, between Edinger Avenue and the Heil Avenue pedestrian bridge from
9 p.m. to 6 a.m..

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.

Brookhurst Street

REMINDER! Crews are installing piles for the foundation of the Brookhurst Street bridge over I-405. 132 piles will be used.

Pile Installation is ongoing 7 a.m. to 4 p.m. and continue on weekdays and Saturdays if needed for approximately one month.

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.

Harbor Boulevard

UPDATE! The closures that were scheduled to work on columns at Harbor were postponed to a later date.

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

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.