Thursday Challenge - Vehicles

What makes this photo that shows no vehicles part of a theme about vehicles?

Photo: BU Bridge

This photo shows the Boston University Bridge. It's one of the few places in the world where a boat can pass under a train, passing under a car, passing under an airplane. How's that for vehicles?  Nifty!

Visit BU Bridge's article on the BU Bridge by clicking here.

Visit more vehicular challenges by clicking here.

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