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t55z: Steel Plaza Station
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t55z: elevated trains on the Market-Frankford Line
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t55z: SEPTA trolley underground
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t55z: 63rd Street Station - SEPTA Market-Frankford Line
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t55z: Ditmars Boulevard Station - Astoria, Queens, New York City
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t55z: Metro on a curve
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t55z: mosaic sign at NY Penn Station
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t55z: Baltimore Metro
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t55z: Baltimore Metro train in black & white
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t55z: State Center Station - Baltimore Metro
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t55z: Times Square subway sign
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t55z: once Grand
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t55z: the 4 train
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t55z: Grand Central-42nd Street subway station
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t55z: Newark NJ AirTrain
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t55z: an arrival at Metro Center Station
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t55z: DC Metro train at Rockville (MD) Station
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t55z: Metro Center Station
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t55z: still more DC Metro
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t55z: yellow signal on the red line
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t55z: 2 CTA trains meet
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t55z: view from the 'L' platform
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t55z: CTA 'L' train in motion
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t55z: CTA 'L' train at Madison station
t55z: CTA red line subway at Grand
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t55z: MARTA train
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t55z: PATH train
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t55z: South Station subway exit
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t55z: SEPTA subway concourse
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t55z: SEPTA subway train