Comment Traffic Furniture (Score 3, Informative) 611
We have the same problem where I live (spoiler: not LA), and the solution is pretty easy. Traffic furniture (aka concrete obsticles in the road) and anti-traffic flow patterns both work very well. Make it hard to get through your neighborhood (lots of 1 ways and blocked roads) for people trying to parallel the 405 & your traffic problems go away. Of course, work with your city government to make this happen.