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Most viewed - Centralized Traffic Control
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 DeGraff to Morgan CTC installation - Big Four150 views
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 Erie Crossing150 views
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 Canadian-Waynoka150 views
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 Erwin - Spartansburg149 views
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 Big Sandy Jct. to Beaver Jct.149 views
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 C.T.C. Machine - Sewell - Montgomery149 views(back end)
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 Arcada - Frankfort149 views
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 Brayton Ave.149 views
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 Mahanoy Tunnel149 views
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 Barstow-Mojave - 506-A CTC Console 5 ft. 149 views
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 Brookfield - Maxwell Installation148 views
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 DeGraff to Morgan CTC installation - Big Four148 views
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 Danville Jct.148 views
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 Portola-Elko Installation148 views
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 Companthia Sederuergica Nacional Machine at Volta Redonda148 views
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 West Trenton Installation147 views
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 Savannah-Hamlet (Locomotive)147 views
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 Page 14 - CTC Projects 1928-1950147 views
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 Page 1 - CTC Projects 1929-1939147 views
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 Hinsdale Interlocking Control Cabinet146 views
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 Hinsdale Interlocking Control Cabinet146 views
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 Erwin - Spartansburg146 views
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 North Milwaukee, Wis.146 views
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 Nobodys - Tusten - Lackawaxen CTC machine146 views
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 Oakland-Stockton146 views
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 T.C.C. Addition Grove to Mile Post 116144 views
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 Faribault - Mendota144 views
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 Arcada - Frankfort144 views
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 Arcada - New Haven144 views
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 Philadephia C.T.C machine144 views
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 Isleta Route Storage Unit144 views
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 Council Bluff-Grow CTC Panel143 views
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