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Most viewed - Centralized Traffic Control
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 C.T.C. machine at Springfield, Mo.184 views
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 Erwin Clinco182 views
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 Herrington to Caldwell182 views
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 Tucson to Lordsburg - TCC Console182 views
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 C.T.C. Machine - Sewell - Montgomery181 views(front right)
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 CTC Installation (Tucson and Lordsburg)181 views
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 (Emporia-Turner) Quenemo-Olathe Sec. - 7'6" CTC Cabinet181 views
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 CTC machine in Morgan Tower - DeGraff to Morgan - Big Four180 views
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 Culver - Eldon180 views
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 Page 7 - CTC Projects 1929-1939180 views
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 Big Sandy Jct. to Beaver Jct.179 views
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 Page 3 - CTC Projects 1929-1939179 views
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 El Reno to Caldwell178 views
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 Type F Interlocking machine, CTC, and Tele. instrument board at FS tower, Fifth Ave.178 viewsElmira, N.Y.
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 Tabor Junction178 views
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 "BY" Tower178 viewsBethlehem
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 Page 4 - CTC Projects 1929-1939178 views
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 Page 5 - CTC Projects 1929-1939178 views
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 Allerton - Eldon176 views
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 2-1/2' CTC cabinet - Valley Pass-Moor176 views
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 Loco. at Signal175 views
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 Page 6 - CTC Projects 1929-1939175 views
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 DeGraff to Morgan CTC machine - Big Four174 views
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 Style C 10' CTC Cabinet - Hinton - Montgomery174 views(front)
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 Tide-Emory Grove Installation173 views
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 Oakland-Stockton173 views
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 T.C.C. Console - M-16 to Grove172 views(control panel)
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 Pittsburgh Jct. - Connellsville172 views
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 CTC panel for St. Louis Terminal172 views
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 Columbus Junction171 views
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 Des Moines Fairbault Inst.170 views
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 Pittsburgh Jct. - Connellsville170 views
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