*It will never be completed.
The route can’t realistically go over, through, or around the Tehachapis.
Even if it could, nobody wants to ride it.*
You may just bright on the Tehachapi’s.
There is something to be said about avoiding construction along the proposed route so that perhaps some day it does become feasible.
The secret plan is to wait until the Big Earthquake hits either the Bay Area or the LA Basin—and then blame it for failure to complete the project!