Those are very densely populated places. Los Angeles is something like 1/6th as dense as NYC. And if LA is anything like the rest of the United States, there are laws on the books preventing it from becoming dense enough to support mass transit like the cities you mention.
> And if LA is anything like the rest of the United States, there are laws on the books preventing it from becoming dense enough to support mass transit like the cities you mention.
Laws can be changed. (Otherwise, congestion tolls wouldn't be an issue, since they could never be imposed.)
