This is one of the shuttle vehicles that ferry people through the service tunnel. The vehicles drive along a magnetic line that keeps them on a straight line inside the tunnel. Otherwise, drivers would have trouble staying on a straight line.
CNET Road Trip 2011
June 30, 2011 4:00 AM PDT
Photo by: Daniel Terdiman/CNET
| Caption by: Daniel Terdiman
Conversation powered by Livefyre