Keystone State Traffic Signals
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District 7
History
Humble Beginnings
The Golden Age of traffic signals
The Poles Inc era
Union/Carlin era
Valmont Era: Part 1
Valmont Era: Part 2
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Classic Signals in Other Parts of the World
Hudson County New Jersey 4-ways
Baltimore, Maryland
Utica, NY 4-ways
Alabama 4-ways
Virginia’s Old and Odd Signals
Tennessee
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Signs and Other Street Furniture
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Garden State Signals
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