Here is the news release from Caltrans:

Caltrans today announced that construction has begun on the Harbor Freeway (I-110) and San Diego Freeway (I-405) interchange to ease traffic congestion for approximately 275,000 motorists who travel it daily.

The $35-million I-110/I-405 interchange improvement project will widen the northbound San Diego Freeway connector to the southbound Harbor Freeway. A new auxiliary lane will also be constructed from the I-110/I-405 interchange to Del Amo Boulevard. Construction is anticipated to be completed in 2021.

Metro provided seed funding for the project’s initial environmental work through its Measure R transportation sales tax that was approved by voters in 2008. 

 Caltrans and its federal and local transportation partners are investing billions in Los Angeles County in projects that will make driving safer, repair highways and bridges and reduce congestion on commuter and freight corridors.

Moreover, with the passage of the Road Repair and Accountability Act of 2017 (Senate Bill 1), $54 billion will be invested over the next decade to fix transportation infrastructure across California. SB 1 funds will enable Caltrans to fix more than 17,000 lane miles of pavement, 500 bridges, and 55,000 culverts by 2027. Caltrans will also fix 7,700 traffic operating systems, like ramp meters, traffic cameras and electric highway message boards that help reduce highway congestion.

The contractor for the project is OHL USA, Inc. of Irvine, California.

Caltrans reminds you to “Be Work Zone Alert.”