Airline, IN 1
all-relay interlocking 2
automatic block signaling 2
automatic train stop 1
Babylon, NY 1
Baltimore & Ohio 1
Brooklyn, NY 1
cab signaling 1
call-on signals 1
centralized traffic control 3
Chicago & Eastern Illinois 1
Chicago Transit Authority 1
Chicago, IL 2
Chicago, Indianapolis & Louisville 1
Chicago, Milwaukee, St. Paul & Pacific 1
color position light signals 1
electro-mechanical interlocking 1
Elmwood Park, IL 1
Floral Park, NY 1
General Railway Signal 2
Gilman, IL 1
grade time control 1
Grafton, WV 1
Grand Trunk Western 1
Griswold Signal 1
Harold, NY 1
Hempstead, NY 1
highway crossing signals 1
Illinois Central 1
illuminated track diagram 1
interlocking 2
J Tower, WV 1
Jamaica, NY 1
La Salle-Congress interlocking, Chicago, IL 1
Lodgville, WV 1
Long Island 1
Maynard, IN 1
mechanical interlocking 1
Mineola, NY 1
Minneapolis, St. Paul & Sault Ste. Marie 1
Monon 1
Montauk, NY 1
Otto, IL 1
Parkersburg, WV 1
Penn, Philadelphia, PA 1
Pennsylvania 3
Philadelphia, PA 1
Port Washington, NY 1
position light signals 2
route interlocking 1
RS Tower, WV 1
signaling 1
Soo Line 1
speed control 1
Spencer, WI 1
spring switches 1
station time control 1
SY Tower, WV 1
Terre Haute, IN 1
Union Route 1
Union Switch & Signal 6
Valley Stream, NY 1
Waukesha, WI 1
Wheeling, IL 1
Wisconsin Central 1

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