[strangesongs]

It's not impossible, but people are stubborn and the voices of home owners/drivers dominate the conversation over anything else.

Those things are scalable -- LA's light rail network is one of the biggest in the country and it's incredible efficient. Over a million people (of a city of 4 million) use LA Metro on a daily basis.

There's no reason LA's fundamental character as a city would change if we allowed duplexes in already dense neighborhoods or as much BRT as possible. But instead we've prioritized voices like the Bel-Air Homeowners Association or some NIMBY idiots in Santa Monica to make policy decisions and are stuck with environmental review on projects that demolish, say, 4 parking spots to build 40 affordable housing units.

[hackerfromthefu]

When you increase population density significantly, the nature of a place changes.

In other words it will no longer be the same LA, but rather LAtropolis .. so gp is right about the physical limits.