Local and state officials marked the start of construction on the I-5 Improvement Project through Irvine and Tustin, a major transportation effort aimed at improving mobility, enhancing safety, and reducing congestion along one of Orange County’s busiest freeways.
The project, led by the Orange County Transportation Authority in partnership with Caltrans, focuses on nearly 9 miles of Interstate 5 between I-405 and SR-55. Planned improvements include the addition of new general-purpose and auxiliary lanes, upgraded interchanges, and modernization of key sections of the corridor.
Transportation officials said the upgrades are intended to ease bottlenecks, improve traffic flow, and create a safer and more reliable travel experience for the more than 276,000 vehicles that travel this segment of I-5 each day. The project is also designed to benefit people who walk, bike, or use transit in the surrounding communities.
“Interstate 5 is part of everyday life in Orange County, from getting to work and school to visiting family and moving goods,” said OCTA Chair Jamey M. Federico, who is also a Dana Point Councilmember. “Starting construction on this project means real, visible progress for the hundreds of thousands of people who rely on this freeway each day. These improvements are about making trips safer, more predictable, and less stressful for everyone.”
Beyond freeway enhancements, the project includes improvements focused on active transportation and community connectivity. Planned elements include upgraded pedestrian curb ramps, repainted bike lanes for improved visibility, additional lighting, and the installation of new guardrails and concrete barriers to improve safety for all roadway users.
Construction is expected to continue through 2030.
