80 mph order 1
Aberdeen, SD 1
absolute permissive block 1
all-relay interlocking 6
Alton 1
Atchison, Topeka & Santa Fe 4
Atlanta, GA 1
Atlantic Coast Line 1
Augusta, GA 1
Aurora, IL 1
automatic block signaling 6
automatic train control 3
automatic train stop 4
Ayer, MA 1
Bakersfield, CA 1
Barnett, GA 1
Barstow, CA 1
Bellevue, OH 1
Boston & Maine 2
Boston, MA 1
Brayton, RI 1
Breckenridge, MN 1
Bridge, UT 1
Bristol, VA 1
cab signaling 1
cab signals 2
Calumet River 1
Camak, GA 1
Canadian National 1
Canadian Pacific 2
Canadian, TX 1
Canby, WA 1
Carolina & Western Carolina 1
Central of Georgia 1
centralized traffic control 7
Cheyenne, WY 1
Chicago & Eastern Illinois 2
Chicago & Illinois Midland 1
Chicago & North Western 2
Chicago Great Western 1
Chicago, Burlington & Quincy 2
Chicago, IL 1
Chicago, Milwaukee, St. Paul & Pacific 3
Chicago, Rock Island & Pacific 2
Chicago, St. Paul, Minneapolis & Omaha 1
Coalhurst, Alberta 1
coded track circuits 2
color light signals 3
Colorado & Southern 1
Columbus & Greenville 1
controlled automatic block 2
Cory, IL 1
Cranbrook, British Columbia 1
Crowsnest, Alberta 1
Danville Jct., IL 1
Danville, IL 1
Denver & Rio Grande Western 1
Denver, CO 1
Depew, NY 1
Detroit & Toledo Shore Line 1
dragging equipment detector 1
drawbridge interlocking 1
Dunmore, Alberta 1
electric lock switches 1
electro-pneumatic interlocking 2
Elgin, Joliet & Eastern 1
Flag Center, IL 1
Florida East Coast 1
Ft. Worth & Denver City 1
Gary, IN 1
General Railroad Signal 1
General Railway Signal 7
Georgia 1
Grand Trunk Western 1
Great Northern 3
Groveton, GA 1
Gulf, Mobile & Ohio 1
highway crossings 1
Hoosac Tunnel 1
Hoosick Falls, NY 1
Huntington, OR 1
Illinois Central 1
Illinois Terminal 1
interlocking 3
International-Great Northern 1
Interstate Commerce Commission 3
isconsin Central 1
Kansas City Southern 1
Lethbridge, Alberta 1
Lincoln, NE 1
Lithonia, GA 1
Lock Haven, PA 1
Long Lake, MN 1
Los Angeles, CA 1
Louisiana & Arkansas 1
Louisville & Nashville 1
Lucin, UT 1
Lydale Jct., MN 1
Lyons, WA 1
manual block 1
manual block signaling 2
Mechanicsville, NY 1
Minneapolis, St. Paul & Sault Ste. Marie 1
Minot, ND 1
Missouri Pacific 1
Missouri-Kansas-Texas 1
Mobridge, SD 1
Mojave, CA 1
motor car indicators 1
Nelson, British Columbia 1
New Orleans, Texas & Mexico 1
New York Central 2
New York, Chicago & St. Louis 2
New York, New Haven & Hartford 1
Nolan, ND 1
Norfolk & Western 2
North Adams, MA 1
North Platte, NE 1
North Yard (Danville, IL) 1
Northern Pacific 1
Ogden, UT 1
Omaha, NE 1
passenger trains 1
Pennsylvania 2
Penticton, British Columbia 1
Peoria & Eastern 1
Pere Marquette 1
Pocatello, ID 1
Porter, L. B. 1
position light signals 1
Providence, RI 1
Radford, VA 1
Redan, GA 1
Roanoke, VA 1
Rotterdam Jct. 1
route interlocking 1
San Diego, CA 1
San Francisco, CA 1
Savanna, IL 1
Schenectady, NY 1
searchlight signals 9
slide detector fences 1
Soapstone, MA 1
Social Circle, GA 1
South Chicago, IL 1
Southern 1
Southern Pacific 2
Spokane, Portland & Seattle 1
spring switches 2
St. Cloud, MN 1
St. Louis Southwestern 1
St. Louis Southwestern of Texas 1
St. Louis, Brownsville & Mexico 1
St. Louis, San Francisco & Texas 1
St. Louis-San Francisco 1
St. Paul, MN 1
station protection signal 1
T. George Stiles 1
Texas & Pacific 1
Troy, NY 1
Tyrone, PA 1
Union Pacific 2
Union Point, GA 1
Union Switch & Signal 9
Vancouver, British Columbia 1
Virginian 1
Wabash 1
Wallace, GA 1
Waynoka, OK 1
Wells, NE 1
Western Pacific 2
Wheeling & Lake Erie 2
Willows, MA 1
Winnemucca, NE 1

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