Well good news there then. LA and the rest of the valley have a huge amount of transit plans moving forward. This video covers it really well.

The same youtuber has a great video breaking down the above project as well. He recommends alt 4. Huge ridership, fast trip, modern stations that tie into current networks well and the best cost/rider ratio. Average trip time is under 20 min end to end, which beats a car even if the rode was impossibly empty.