Connecting passageway

Connecting passageway

This is a finished connecting passageway. There are sections like this every 325 meters throughout the tunnel. These passageways can allow anyone to escape a troubled train that cannot make it to an emergency station.

June 7, 2011 4:00 AM PDT

Photo by: Daniel Terdiman/CNET

| Caption by: Daniel Terdiman

 

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