Thank you for that excellent link to the rapid transit map. It's fairly cluttered, but once you get wade throught it, the heavy rail ambitions are weak.
When I was a young and first rode on BART as a tourist, I instantly thought L.A. should have the following:
1. Red Line as a subway - ditto - BUT extended out to West Valley, with NO stupid busway to pick up the slack from North Hollywood westward
2. Purple Line as a subway - ditto - BUT extended out to Santa Monica, or the beach*
3. Gold Line - not ditto - to Pasadena and beyond as heavy rail
4. Blue Line - not ditto - to Long Beach as heavy rail
5. Green Line - not ditto - east to west as heavy rail
6. A line out to El Monte, West Covina, La Puente and Pomona as heavy rail
7. A very important belt line, essentially following the 405 - coming from at least the base of the Valley, picking up the airport, hitting the flatlands of the South Bay and terminating at what is now the Blue Line
SEVEN lengthy heavy rail lines would have made the city of L.A. and many major suburbs quickly navigable by rail. Look at how BART covers so much area, except for monied Marin County and the Peninsula (the latter of which has apparently regretted it).
* I am laughing my ass off as I see ONE stop in BH at Wilshire and Beverly. That must have been a "political" gesture of goodwill by the people of Beverly Hills to the commoners, while they were quaking in their boots.
Sadly, pow, most of us who left Los Angeles and whose lives have taken us somewhere else love coming back to L.A. and seeing a rapid transit system unfold, though we will probably never move back. I was hoping for more heavy rail and was hoping it was sooner than later.