absolute permissive block signaling 1

Alazon, NV 1

Albion, MI 1

Atchison, Topeka & Santa Fe 2

Atlantic Coast Line 1

Aurora, IL 1

automatic block signaling 1

Boston & Maine 1

Brooklyn-Manhattan Transit 1

Burlington, IA 1

Cameron, PA 1

Carpenter Street, Chicago, IL 1

Chicago & Alton 1

Chicago Union Station 1

Chicago, Indianapolis & Louisville 1

Chicago, Milwaukee & St. Paul 1

Cincinnati, New Orleans & Texas Pacific 1

Clinton Street, Chicago, IL 1

color position light signals 1

Council Bluffs, IA 1

Crawford, WI 1

Delaware, Lackawanna & Western 1

Division Street, Chicago, IL 1

Downers Grove, IL 1

Earlville, IL 1

East St. Louis, IL 1

economics 1

Elmhurst, IL 1

Galveston, Harrisburg & San Antonio 1

Gilman, IL 1

Grand Central Terminal, New York, NY 1

Hall dwarf signals 1

Huntley, PA 1

interlocking 2

Jackson, MI 1

Kansas City Southern 1

Lake Street, Chicago, IL 1

Lexington Avenue Line, Brooklyn, NY 1

lightning 1

LM Cabin, Columbus, OH 1

Louisville & Nashville 1

maintenance 1

Markham Yard, IL 1

Mendota, IL 1

Michigan Central 2

Missouri Pacific 1

Missouri Valley, IA 1

Missouri-Kansas-Texas 1

Monon 1

Myrtle Avenue Line, Brooklyn, NY 1

Nashville, Chattanooga & St. Louis 1

New York, New Haven & Hartford 2

Noble Street, Chicago, IL 1

Oregon-Washington Railroad & Navigation 1

Otto, IL 1

Oxford, NE 1

Phinney, R. M. 1

Pittsburgh & Lake Erie 1

Post, W. M. 1

reserve yellow 1

Southern Pacific 2

St. Louis-San Francisco 1

Toledo & Ohio Central 1

Type E signals 1

Weso, NV 1

West Burlington, IA 1

West Chicago, IL 1

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