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Blue Flaggin

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A Union Pacific employee applies a 'blue flag' to a track in the giant Proviso Freight Yard in suburban Chicago. The flag is to protect employees who may be working on equipment on that track.
Copyright
Nick Suydam © 2010
Image Size
3054x4581 / 7.6MB
Contained in galleries
Union Pacific Railroad Stock Photos, People Make the Trains Run on Time, Railroad Stock Photos
A Union Pacific employee applies a 'blue flag' to a track in the giant Proviso Freight Yard in suburban Chicago. The flag is to protect employees who may be working on equipment on that track.