Improving the San Diego Freeway

 https://www.octa.net/programs-projects/projects/freeway-projects/i-405-improvements-project/overview/

https://www.socalregion.com/highways/la_highways/i-405/

https://en.wikipedia.org/wiki/Interstate_405_(California)

https://dot.ca.gov/caltrans-near-me/district-12/district-12-programs/district-12-environmental/san-diego-freeway-i-405-improvement-project