NOTE:
Although all of these digitized articles are 60 or more years old, and likely have minimal commercial value today, the reader should bear in mind that material dated after 1923 remains under copyright by Simmons-Boardman Publishing.
These articles and the information contained therein may be freely reproduced or used in printed or electronic form for non-commercial or educational purposes, provided the copyright holder and original author (if known) are acknowledged, and provided that such publication also refers readers to the original document on this site.
Simply making interesting material available to those who share my interest in the railway signal systems of the past has been my sole objective in this long project.
1938 1
| 1938 index 4.0 MB |
aspects and indications 1
| Fundamental Aspects 651.0 KB |
Atchison, Topeka & Santa Fe 1
| Changing Relays 1.7 MB |
Atlantic Coast Line 1
| Light Signals as Train Order Signals 731.0 KB |
Austin, MN 2
automatic block signaling 3
automatic interlocking 2
automatic train stop 1
| Train Control Petition Denied by ICC 905.5 KB |
Baltimore & Ohio 2
Baltimore & Ohio Chicago Terminal 1
Baltimore, MD 1
Barrington, IL 1
| EJ&E Installs APB Signaling 3.1 MB |
Branch Jct., IL 1
| Train Control Petition Denied by ICC 905.5 KB |
Calmar, IA 1
Canadian National 1
| Changing Relays 1.7 MB |
Canadian Pacific 2
| Changing Relays 1.7 MB |
| Light Signals as Train Order Signals 731.0 KB |
Carbondale, IL 1
| Accident Involving Rule 93 1.5 MB |
centralized traffic control 3
Champaign, IL 1
| Train Control Petition Denied by ICC 905.5 KB |
Chesapeake & Ohio 1
| Changing Relays 1.7 MB |
Chicago & North Western 2
Chicago Junction 1
Chicago North Shore & Milwaukee 1
Chicago, Burlington & Quincy 1
Chicago, IL 5
Chicago, Milwaukee, St. Paul & Pacific 4
Chicago, Rock Island & Pacific 4
color light signals 1
| AC Primary on the Katy 442.5 KB |
Columbia, PA 1
Delaware & Hudson 2
| Light Signals as Train Order Signals 731.0 KB |
| The Outlook for Signaling 1.3 MB |
economics 1
| The Outlook for Signaling 1.3 MB |
Elgin, Joliet & Eastern 1
| EJ&E Installs APB Signaling 3.1 MB |
Elyria, OH 1
emergency yellow color light 1
| AC Primary on the Katy 442.5 KB |
Enola, PA 1
Flinton, IL 1
| CTC on the Missouri Pacific 5.3 MB |
Great Northern 1
Gresham, Chicago, IL 1
Harrisburg, PA 1
Herington, KS 1
highway crossings 1
Howard Avenue, Chicago, IL 1
Huntsdale, MO 1
| AC Primary on the Katy 442.5 KB |
Illinois Central 3
| Accident Involving Rule 93 1.5 MB |
| Non-Stop Permissive Automatic Signals 1.4 MB |
| Train Control Petition Denied by ICC 905.5 KB |
index 1
| 1938 index 4.0 MB |
Indianapolis Union 1
Indianapolis, IN 1
interlocking 2
Kalamazoo, MI 1
Leeds, England 1
| Relay Interlocking at Leeds 4.3 MB |
London & North Eastern 1
| Relay Interlocking at Leeds 4.3 MB |
Mason City, IA 1
McCracken, KS 1
Michigan Central 1
Missouri Pacific 3
Missouri-Kansas-Texas 1
| AC Primary on the Katy 442.5 KB |
Morrisville, PA 1
New Franklin, MO 1
| AC Primary on the Katy 442.5 KB |
New York Central 2
New York, NY 1
North Chicago, IL 1
Northern Pacific 1
Paoli, PA 1
Parkesburg, PA 1
Parsons, KS 1
| AC Primary on the Katy 442.5 KB |
Pavonia, NJ 1
Pennsylvania 5
| Grade Signal Markers 596.4 KB |
| Interlocking Changes on the Pennsylvania 4.9 MB |
| Milwaukee Rehabilitates Large Plant 8.0 MB |
| Pennsylvania Electrification Signaling 5.3 MB |
| The Outlook for Signaling 1.3 MB |
Pere Marquette 1
Perryville, MD 1
Philadelphia, PA 1
Raddle Jct., IL 1
| CTC on the Missouri Pacific 5.3 MB |
Ramsey, MN 1
Rocheport, MO 1
| AC Primary on the Katy 442.5 KB |
Rondout, IL 1
| EJ&E Installs APB Signaling 3.1 MB |
Seaboard Air Line 1
signaling 1
| Signaling at Spring Switches 930.3 KB |
South Amboy, NJ 1
Spaulding, IL 1
| EJ&E Installs APB Signaling 3.1 MB |
spring switches 1
| Signaling at Spring Switches 930.3 KB |
St. Louis, MO 1
| AC Primary on the Katy 442.5 KB |
St. Louis-San Francisco 1
Sugar City, CO 1
Texas & Pacific 1
| Changing Relays 1.7 MB |
Thorndale, PA 2
Toledo, OH 1
Tucumcari, NM 1
Union Route interlocking 1
Union Switch & Signal 1
| AC Primary on the Katy 442.5 KB |