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I-405 Improvement Project construction alert: Week of March 9

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

Click to see closures and detours on the interactive map.

UPDATE! Northbound (NB) Full Freeway Closures for McFadden Avenue bridge falsework construction

Crews will continue constructing falsework for the McFadden bridge over I-405 in Westminster.

This work will require full NB ramp, lane and freeway closures of I-405 between Bolsa Avenue and Beach Boulevard

Nightly closures are ongoing 11 p.m. to 5 a.m. Wednesday, March 11, to Friday, March 13.

NB closures were canceled March 9, and March 10, due to the rain.

UPDATE! Southbound (SB) Full Freeway Closures for McFadden Avenue bridge falsework construction

Crews will continue constructing falsework for the McFadden bridge over I-405 in Westminster.

This work will require full SB ramp, lane and freeway closures of I-405 between Beach Boulevard and Bolsa Avenue.

Nightly closures are set for 11 p.m. to 5 a.m. Monday, March 16, to Friday, March 20.

REMINDER! NB I-405 off-ramp to Magnolia Street closed for approximately one month

Crews completely closed the NB I-405 off-ramp to Magnolia Street for approximately one month. The ramp is being rebuilt as part of the freeway widening project.

The ramp is scheduled to reopen March 24.

REMINDER! NB I-405 on-ramp from Magnolia Street closed for approximately one month

Crews completely closed the NB I-405 on-ramp from Magnolia Street for approximately one month. The ramp is being rebuilt as part of the freeway widening project.

The ramp is scheduled to reopen March 24.

NEW! McFadden Avenue K-rail Placement and Lane Reductions

Crews will place k-rail along McFadden Avenue, between Beach Boulevard and the freeway, to support the bridge widening and electrical work.

One lane in each direction will remain open, and access to Sugar Drive will be maintained at all times.

K-rail installation is set for the night of Wednesday, March 18, and will be in place for approximately two months.

NEW! SR-73/ I-405 Connector Overhang Demolition

Crews will remove a portion of the overhang from the SB I-405/SR-73 connector.

The work will require nightly closures of the SB I-405 on-ramp from Fairview, 10 p.m. to 5 a.m. Monday, March 16, to Friday, March 20.

COMING SOON! Magnolia Street Bridge Traffic Shift

Crews will shift traffic to the new side of the Magnolia bridge later this month.

This work will require a 55-hour closure of the southbound (SB) on- and off-ramps at Magnolia and nightly full bridge closures.

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

COMING SOON! SB I-405 on-ramp from Edinger Avenue to close for approximately one month

The SB I-405 on-ramp from Edinger is scheduled to close for approximately one month in late March. The ramp will be reconstructed as part of the freeway widening.

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

Construction Activities

Fairview

Crews are backfilling the abutments of the new portion of the Fairview bridge.

  • Ongoing, 10 p.m. to 5 a.m., on weeknights

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.