I'm pretty sure it's some variant of maglev in an evacuated tube. Daryl Oster (www.et3.com) has been pushing it for quite a long time. The big difference is tha

I'm pretty sure it's some variant of maglev in an evacuated tube. Daryl Oster (www.et3.com) has been pushing it for quite a long time. The big difference is that Musk has the contacts and personal background to possibly make it a reality on a reasonable timeframe.