Octa's transportation blog

405 Improvements Continue into 2019 and Beyond

Nearly one year ago, OCTA broke ground on the largest freeway construction project in its history. The $1.9 billion I-405 Improvement Project is adding 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.

Major construction began in March, when crews began demolishing the McFadden Avenue, Slater Avenue, Bolsa Chica Road and Magnolia Street bridges.

Looking ahead, 2019 will be a busy year for bridge construction, with work planned on the Fairview Road and Bolsa Avenue bridges followed by additional bridge construction later in the year. The McFadden Avenue and Slater Avenue bridges are anticipated to be completed and open to traffic in late 2019.

Expected to launch soon, the I-405 Improvement Project Mobile App will showcase the project’s interactive map by providing live traffic conditions, along with project news, photos, streaming video from the field, complete closure and detour information and general project information.

Learn more about the project here.

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