Retractable maglev elements will guide and power up your craft in the tunnel. At 20 000 km/h San Francisco to Prague can be done in 25 minutes then, and if you like it you can have a little break at the wild southern shores of the Hudson Bay just 10 minutes after you left Fishermans Wharf.


http://www.wired.com/autopia/2011/01/drive-around-the-world-in-two-hours-on-the-traffic-internet/
http://nextbigfuture.com/2011/02/twenty-times-more-efficient-electric.html
http://www.acabion.com