OCTA 405 Improvement

The Orange County Transportation Authority, in cooperation with Caltrans, is widening the San Diego Freeway (I-405) between SR-73 and I-605.

The project is improving 16 miles of I-405 between the SR-73 freeway in Costa Mesa and I-605 near the Los Angeles County line. Construction updates are as follows: The Edinger Avenue bridge over I-405 has closed for 18 months as of Oct. 22 for demolition and reconstruction.

Crews will demolish the bridge over two nights to accommodate the freeway widening. This work will require full closures of northbound (NB) and southbound (SB) I-405 between Beach Boulevard and Bushard Street.

Additional nighttime demolition will occur for several weeks under freeway lane closures. Some daytime demolition also is anticipated.

Sign up to receive updates specific to Edinger bridge construction via email, call or text at bit.ly/405-signup. Coming Soon: Harbor Boulevard Falsework Installation

Crews will be constructing the falsework for the I-405 bridge over Harbor Boulevard. This work will require full closures of Harbor.

Southbound I-405 Loop Off-Ramp to Beach Boulevard is PERMANENTLY CLOSED The SB I-405 loop off-ramp to NB Beach Boulevard is permanently closed. Motorists will use the Beach Boulevard/ Center Avenue off-ramp from now on to access NB and SB Beach.

The loop off-ramp was eliminated to accommodate the widening of Beach and of the freeway. The Beach/ Center off-ramp and Center are being reconstructed to accommodate the change in traffic volume.

The 405 Community Outreach Team is Still Working

Email 405project@octa.net or call (888) 400-8994 for more information.

The I-405 Improvement Project mobile app includes quick access to current traffic conditions, closures and detours, along with project updates and links to contact the project team.

It’s available for download on the Apple Store or Google Play.