Good Question: How Was The Transbay Tube Built?

SAN FRANCISCO (CBS 5) – It’s an amazing feat of engineering that many Bay Area commuters rely on, but we’re not talking about the Golden Gate Bridge or Bay Bridge. In this Good Question: How was the Transbay Tube built?

Our video report has more.

(Copyright 2011 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)

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