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

I-405 Improvement Project construction alert: Wednesday, May 18

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.

COMING SOON! Northbound (NB) and Southbound (SB) I-405 Full Closures at the I-405/SR-73 Connector for a Concrete Pour

Crews will close all northbound (NB) and southbound (SB) I-405 freeway lanes at the I-405/SR-73 Connector in Costa Mesa to pour concrete for the new Express Lanes connector.

The closures are anticipated as early as 8 p.m. Saturday, June 4 to 11:30 a.m. Sunday, June 5.

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.

NOW OPEN! Fairview Road Bridge

I-405 Improvement Project Marks Milestone with Ninth Bridge Opening

Completion of the Fairview Road bridge marks an important milestone. Check out our video in celebration of the bridge opening!

NOW OPEN! Northbound (NB) and Southbound (SB) Fairview Road On- and Off-Ramps

The northbound and southbound Fairview Road on- and 0ff-ramps are now open.

UPDATE! Southbound (SB) I-405 Loop On-Ramp from Harbor Boulevard to Close for Approximately One Month

Crews will close the SB I-405 loop on-ramp from Harbor Boulevard for approximately one month to accommodate the freeway widening.

The closure is anticipated to start as early as 10 p.m. Monday, May 23.

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

REMINDER! Goldenwest Street Bridge Closures for Waterline Installation

Crews will continue installing a waterline along the Goldenwest Street bridge over I-405. This work requires nightly Goldenwest bridge closures between Sowell Avenue and Westminster Mall Road.

The nightly closures are ongoing 10 p.m. to 5 a.m. TONIGHT, May 18, through Friday, May 20.

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

UPDATE! Southbound (SB) I-405 On-Ramp from Bolsa Avenue to Close for Approximately One Month

Crews will close the SB I-405 on-ramp from Bolsa Avenue for approximately one month to accommodate the freeway widening.

The closure is anticipated to start as early as 10 p.m. Wednesday, May 25.

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

NEW! Southbound (SB) I-405 /Eastbound (EB) SR-22 Connector for Pavement Activities

Crews will conduct permanent pavement work along SB I-405 and EB SR-22. This work will require the connector to be reduced to two lanes.

The nighttime lane reductions are anticipated for 10 p.m. Friday, May 20 to 5 a.m. Friday, July 15.

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

UPDATE! Northbound (NB) and Southbound (SB) I-405 Lane Reductions for Newland Street Column Foundation Activities

Crews will continue pouring concrete for cast-in-drilled-hole (CIDH) pile installation to support the foundation of the center median columns at the Newland Street bridge. This work will require lane reductions on NB and SB I-405.

The nighttime lane reductions are anticipated for Saturday, June 4.

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

UPDATE! Northbound (NB) I-405 Closures to Remove Falsework from the Westminster Boulevard Bridge

Crews will continue removing the falsework from the Westminster Boulevard bridge over I-405.

This work requires NB I-405 closures between the NB I-405 off-ramp to Willow Lane/Westminster and the NB I-405 on-ramp from Westminster.

Closures are anticipated as early as 11 p.m. to 5 a.m. Monday through Thursday, and 11 p.m. to 6 a.m. on Friday.

Nightly NB I-405 closures are anticipated:

  • Wednesday, May 18; and
  • Thursday, May 19.

UPDATE! Southbound (SB) I-405 Closures to Install Falsework for the Bolsa Avenue Bridge

Crews will continue installing falsework for the Bolsa Avenue bridge over I-405.

This work requires SB I-405 closures between the SB I-405 off-ramp to Springdale Street and the SB I-405 on-ramp from Bolsa.

Closures are anticipated as early as 11 p.m. to 5 a.m. Monday through Thursday, and 11 p.m. to 6 a.m. on Friday.

Nightly SB I-405 closures are anticipated Monday, May 23, to Thursday, May 26.

REMINDER! Northbound (NB) I-405 Loop On-Ramp from Seal Beach Boulevard Closed for Approximately One Month

Crews closed the NB I-405 loop on-ramp from Seal Beach Boulevard to accommodate the freeway widening.

The ramp closed Monday, April 25, and is anticipated to reopen after approximately one month.
Click to see closures and detours on the interactive map.

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 at the end of May.

The SB I-405 loop on-ramp from Goldenwest closed on Saturday, March 12, and is anticipated to reopen at the end of May.

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

Crews will install falsework for the I-405/ SR-73 Connector over I-405.

This work requires NB I-405 closures between the NB I-405 off-ramp to South Coast Drive and the NB I-405 on-ramp from Hyland Avenue and a SB I-405 closure between the SB I-405 off-ramp to Harbor Boulevard and the SB I-405 on-ramp from Bristol Street.

Closures are anticipated as early as 11 p.m. to 5 a.m. Monday through Thursday, and 11 p.m. to 6 a.m. on Friday.

  • Nightly NB I-405 closures are ongoing through Thursday, May 26.
  • The NB I-405/SR-73 connector will also be closed 11 p.m. to 7 a.m.
  • Nightly SB I-405 closures are ongoing through Thursday, May 26.

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

Montecito Channel

REMINDER! Crews have demolished a portion of the sound wall along the westbound (WB) SR-22/7th Street connector, adjacent to the Montecito Channel, behind homes on College Park Drive and are preparing the foundation for the new wall which is anticipated to be constructed summer 2022.

Temporary fencing and sound blankets were installed.

Crews may access the work zone, intermittently along College Park Drive and from the WB SR-22 connector, to mobilize equipment as early as 6 a.m., and some activities may occur at night from 9 p.m. to 6 a.m.

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

North Gate Road

COMING SOON! Crews will close North Gate Road to conduct sewer line work along the wall. This closure is anticipated for summer 2022.

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

UPDATE! Crews will perform electrical work along Almond Avenue at the intersections of Carnation Circle, Dahlia Circle, Teaburry Street and Violet Street. Parking along the south side of Almond will be restricted.

Electrical work is anticipated to begin Monday, May 23, 7:30 a.m. to 4:30 p.m. for approximately three weeks.

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 will continue 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 ongoing, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed for approximately three more 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 will continue constructing the new traffic signal at the Westminster Boulevard/Springdale Street intersection as part of the bridges’ reconstruction.

Activities include 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 permanent signal is ongoing, 7 a.m. to 4 p.m. on weekdays and Saturdays, as needed.

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 will remove shoring beams and plates along the sound wall adjacent to southbound (SB) I-405, between the Bolsa Avenue bridge and the railroad.

Shoring removal is anticipated to begin Monday, May 23,
7 a.m. to 4 p.m. for approximately one week.

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.

A crane is planned to be staged at the freeway level for this work.

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

Sugar Drive

REMINDER! Crews will continue conducting pavement work along Sugar Drive. To complete this work, Sugar is closed between Cascade/ Shasta Lane and Rushmoor Lane. Driveway access will be maintained.

Activities include asphalt removal, pavement, and curb and gutter construction.

Sugar Drive closed Monday, May 10, and is anticipated to open after approximately two weeks.

Activities will be scheduled 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 at night from 9 p.m. to 6 a.m.

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

REMINDER! 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.

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.