405 Freeway Update
The Orange County Transportation Authority, in cooperation with Caltrans, is widening the San Diego Freeway (I405) 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, and projects are ongoing all along the construction corridor. 405
Construction updates are as follows:
• I-405 Northbound