LA's I-405 Expands With $716M Mobility Upgrade

$716M project adds one lane each direction on I-405 between SR-55 in Orange County

I-405 Adds Lane Between SR-55 in $716M Project

Orange County drivers will see expanded highway capacity as a major construction project adds lanes to a congested corridor. The Orange County Transportation Authority broke ground Thursday on a $716 million improvement project that'll add one regular lane in each direction between I-405 and SR-55. The project also includes enhanced facilities for cyclists and pedestrians along the corridor.

Context

The corridor between I-405 and SR-55 serves thousands of daily commuters in the Greater Los Angeles region, where traffic congestion has increased as the area's population grows. OCTA officials said the project addresses growing traffic demands while improving accessibility for multiple types of travelers. The improvements reflect modern transportation planning that prioritizes diverse options beyond just vehicle capacity. Transit agencies across California have increasingly incorporated bike and pedestrian facilities into highway expansion projects to serve all commuters.

Project Details

The $716 million project will add one regular lane in each direction along the corridor, OCTA confirmed. Officials said the expansion is expected to improve traffic flow and reduce congestion during peak hours. The project takes a comprehensive approach by including enhanced facilities for cyclists and pedestrians, making the corridor safer and more accessible for those who bike or walk. Specific details about the bike and pedestrian improvements weren't available by publication time.

Timeline

Construction officially began January 23, officials said. OCTA hasn't announced a completion date for the project. The agency typically provides construction timelines and milestone updates as work progresses, though specific phases and duration for this project weren't immediately available.

Impact

The improvements are expected to benefit thousands of daily commuters and residents who rely on this corridor for work and personal travel. Officials said the expanded capacity should reduce travel times during peak periods. Drivers can check Moovit for real-time traffic updates and alternative routes during construction phases.