Heh. The diverging section they're talking about was to be through my home town. Gosh - I knew the proposal was doomed several years ago on hearing about the push for the reroute, which was very similar to SP's L.A-Bakersfield line through Tehachapi.
But then, even skipping the Antelope Valley, the Tejon Pass cut-through to Bakersfield is one humongous fault zone. The San Andreas, Santa Ynez, San Gabriel, Garlock and two lesser faults all intersect in or near the pass.