Shane Phillips has been making some interesting maps while studying for his masters at USC. His most recent shows which neighborhoods are the least (and most) car dependent. (You have to log onto his website to see them; link is below.) The most car-free is — you guessed it — Westlake/MacArthur Park, where nearly 80% of residents use public transit for their commute, and Long Beach, North Hollywood and Van Nuys also have a higher commute mode share for walking, biking and transit, as do most of the neighborhoods around downtown LA.

He's also done a map of mode share for pedestrians, and a map of the absolute number of people who commute other than by car (as opposed to a population-weighted percentage).

See maps HERE.