Not too long ago, someone asked me why the 405 was called the San Diego Freeway. Downtown San Diego is 75 miles away. It doesn't even come close to the San Diego county line either. There really is no reasonable explanation for the naming of this freeway. After doing a little investigating this afternoon to find out exactly how this name came about, I can only conclude one thing. It was created in the early 60s, meaning the person responsible for coming up with the freeway name was smoking a little too much pot.
(courtesy of city-data.com & svresources.com)