the Expressway System (Page Mill, Oregon, Central, Montague, San Tomas, Lawrence, Capitol)

Don't forget Southwest Expressway, that sad little stretch from Stokes(?) to 280 south of San Jose City College.

As for San Mateo county, Caltrain already served as an artery through it. San Mateo county residents would have been used as cash cows for SF to Western Alameda county, just like eastern Alameda County has been for five decades.