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Partial Bridge Openings Mark Major Milestones for I-405 Improvement Project

The I-405 Improvement Project reached its first milestone of 2021 with the opening of the first halves of the Westminster Boulevard and Fairview Road bridges.

The first half of the new Westminster Boulevard bridge opened to traffic in Westminster on January 28, and the first half of the Fairview Road bridge in Costa Friday opened on  February 12. The two bridges are among 18 to be built, widened or replaced as part of the project, which aims to speed up travel times on I-405 between Costa Mesa and the Los Angeles County line.

Both bridges are being demolished and reconstructed in two stages, one half at a time, allowing them to remain open to traffic in both directions during construction.

Demolition of the second half of the Fairview Road bridge will require overnight closures of the I-405. Closures near Fairview Road are scheduled for Saturday, Feb. 20, and again on Saturday, Feb. 27. 

Construction of the I-405 Improvement Project will continue in full swing throughout 2021. Half of the 18 bridges being rebuilt as part of the project are anticipated to be completed by the end of the year.

The Talbert Avenue and Magnolia Street bridges, along with the first half of the Bolsa Avenue bridge, are expected to open in the first half of 2021. Later in the year, the Heil Avenue pedestrian overcrossing, along with the Edwards Street, Bolsa Chica Road and Goldenwest Street bridges, are scheduled to open.

For the latest construction schedule, as well as closure and detour information, visit the project’s interactive map or download the free 405 Improvement mobile app in the App Store or in Google Play.

The I-405 Improvement Project, now more than halfway complete, will add one regular lane in each direction between Euclid Street and I-605, and a second lane in each direction in the center of the freeway from SR-73 to I-605 that will combine with the existing carpool lanes to form the 405 Express Lanes.

This 16-mile segment of I-405 is one of the most heavily traveled stretches of highway in the nation, and drivers routinely face severe congestion in both the regular lanes and carpool lanes. The project is critical to accommodate expected employment, population and housing growth throughout the region.

For more information on the I-405 Improvement Project, click here.

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