What the first "Carmageddon" proved to me (as much as the 1984 Summer Olympics before it) is that most car trips in and around L.A. are not only nonessential but downright pointless.
When confronted with the World War II-era question, "Is this trip necessary?," I would have to believe that most Los Angeles drivers would say no. One way to combat the L.A. freeway traffic would be to close a few highways down regularly to make people prioritize their travel and their lives.
Me? I don't leave the Valley.