While looking up something else, I found this map (PDF file): [
metro.net]
Might be interesting to overlay a map of the old PE and LAT lines to see the similarities. The Long Beach light rail and El Monte Busway/Metrolink SB line (in the median of the 10 freeway) for instance run on old PE lines. Hollywood subway of course does not - instead of being in the median of the freeway (where PE ran at the end) it punches a hole in the Santa Monica Mountains.
Main thing of interest for railfans is that this is the only map I've seen that has all the rail transit and commute train lines in LA shown.