http://www.cnet.com/news/watch-1200-japanese-engineers-switch-an-above-ground-train-track-to-a-subway-line-in-three-hours/#ftag=CAD590a51e
Renee Richardson
flipped into Cool stuff
http://www.cnet.com/news/watch-1200-japanese-engineers-switch-an-above-ground-train-track-to-a-subway-line-in-three-hours/#ftag=CAD590a51e