12 proposed route alternatives considered in 1995 for Caltrain:
Long Cut King LPA:
Long tunnel (portal south of Seventh &amp; Berry)
Routed under King Street
Cut &amp; cover construction (continues under King and The Embarcadero, turns north on Beale)
Terminal at Market &amp; Beale
Short Cut King LPA:
Short tunnel (portal near Sixth and King)
Routed under King Street
Cut &amp; cover construction (continues under King and The Embarcadero, turns north on Beale)
Terminal at Market &amp; Beale
Long Mined King LPA:
Long tunnel (portal south of Seventh &amp; Berry)
Routed under King Street
Mined construction (turns north from King at Fourth, meets Beale near Harrison)
Terminal at Market &amp; Beale
Short Mined King LPA:
Short tunnel (portal near Sixth and King)
Routed under King Street
Mined construction (turns north from King at Fourth, meets Beale near Harrison)
Terminal at Market &amp; Beale
Long Cut King TBT:
Long tunnel (portal south of Seventh &amp; Berry)
Routed under King Street
Cut &amp; cover construction (turns north after Second)
Terminus at Transbay Terminal
Short Cut King TBT:
Short tunnel (portal near Sixth and King)
Routed under King Street
Cut &amp; cover construction (turns north after Second)
Terminus at Transbay Terminal
Long Cut Townsend LPA:
Long tunnel (portal south of Seventh &amp; Berry)
Routed under Townsend Street
Cut &amp; cover construction (continues under Townsend and The Embarcadero, turns north on Beale)
Terminal at Market &amp; Beale
Short Cut Townsend LPA:
Short tunnel (portal near Fifth and Townsend)
Routed under Townsend Street
Cut &amp; cover construction (continues under Townsend and The Embarcadero, turns north on Beale)
Terminal at Market &amp; Beale
Long Mined Townsend TBT:
Long tunnel (portal south of Seventh &amp; Berry)
Routed under Townsend Street
Mined construction (turns north from King at Third)
Terminal at Market &amp; Beale
Short Mined Townsend TBT:
Short tunnel (portal near Fifth and Townsend)
Routed under Townsend Street
Mined construction (turns north from King at Third)
Terminal at Market &amp; Beale
Long Cut Townsend TBT:
Long tunnel (portal south of Seventh &amp; Berry)
Routed under Townsend Street
Cut &amp; cover construction (turns north after Second)
Terminus at Transbay Terminal
Short Cut Townsend TBT:
Short tunnel (portal near Fifth and Townsend)
Routed under Townsend Street
Cut &amp; cover construction (turns north after Second)
Terminus at Transbay Terminal
Own work, redrawn from 1995 report
Mliu92