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.
1911 | Signaling on the Illinois Traction System 1.5 MB |
---|
1945 | Collision Entering CTC Line Due to Inadequate Signal 557.7 KB |
---|
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
---|
1913 | New Block Signaling on the North-Western 1.8 MB |
---|
1935 | Maintainers' Tool Houses 3.5 MB |
---|---|
1935 | Maintainers' Tool Houses 1.1 MB |
1937 | Improving Signal Performance 2.1 MB |
---|---|
1925 | Maintenance on C&NW Terminals 12.5 MB |
1937 | Railway Signaling by Wireless 1.6 MB |
---|
1915 | Extension of New Haven signals 684.8 KB |
---|
1915 | Electric Train Staff Installation 3.3 MB |
---|
1921 | A Complete Train Despatching System 1.7 MB |
---|
1909 | Willson's Gummed Paper Letters and Figures 170.0 KB |
---|---|
1909 | Willson's Gummed Paper Letters and Figures 598.7 KB |
1950 | OSing Device 1.4 MB |
---|
1911 | Automatic Signals on the Northern Pacific 7.2 MB |
---|
1918 | Record Snowstorms Paralyze Transportation 424.7 KB |
---|
1936 | Approach Electric Lighting On the Erie 2.7 MB |
---|
1954 | Train Operations When CTC Fails 2.0 MB |
---|
1947 | Annual Review and Outlook 425.1 KB |
---|
1934 | Accident at Crossing 491.3 KB |
---|
1950 | Neon Lighting For Crossing Gate Arms 3.1 MB |
---|
1943 | Accident Involves Signaling 1.0 MB |
---|
1935 | Use of Marker Lamps 1.0 MB |
---|
1949 | A Mile-Stone In Signaling 1.2 MB |
---|---|
1926 | Electro-Pneumatic Car Retarders in Service on Illinois Central 3.8 MB |
1925 | IC Markham contracts: News of the Month (June 1925) 579.3 KB |
1950 | IC Rebuilds Classification Yard 6.9 MB |
1941 | Illinois Central Uses Automatic Telephone System on Chicago Terminal Area 5.8 MB |
1943 | Automatic Signaling Installed On the Wabash 5.3 MB |
---|
1940 | New Automatic Block Signaling on the Milwaukee 6.3 MB |
---|
1933 | Double Filament Lamp With Dividing Screen Gives Burn-Out Indication 694.0 KB |
---|---|
1937 | The Rotating Stop Sign 1.1 MB |
1949 | Varied Light Intensity 921.0 KB |
1939 | Illinois Central Application Denied 854.7 KB |
---|
1940 | Coded Track Control 2.5 MB |
---|
1941 | Flashing Yellow as a Fourth Aspect on the IC 2.6 MB |
---|
1929 | Big Four Improves Operation by Remote Control 2.5 MB |
---|---|
1921 | Educational Meetings On the Illinois Central 616.5 KB |
1935 | Safety of High Speed Trains 5.2 MB |
---|---|
1935 | Signaling for Higher Train Speeds 3.0 MB |
1952 | Interlockings Modernized at Three Railroad Crossings 974.7 KB |
---|
1934 | CTC Installed on the Baltimore & Ohio 2.1 MB |
---|
1954 | IC Combines Interlockings 1.5 MB |
---|
1911 | Automatic Signals on the Chicago Great Western 7.4 MB |
---|
1929 | C. & A. Modernizes Signaling Facilities 2.2 MB |
---|---|
1934 | Centralized Traffic Control Installed on the Alton 1.7 MB |
1915 | Electric Train Staff Installation 3.3 MB |
---|
1938 | Adapting Signaling to Requirements 1.7 MB |
---|
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
---|---|
1943 | Signals Ordered on the Kansas City Southern 1.4 MB |
1956 | Crossing Protection In Industrial Area 3.1 MB |
---|
1943 | CTC on the Bessemer & Lake Erie 8.7 MB |
---|
1935 | Mechanical Color Light Signals in England 1.3 MB |
---|
1936 | Cleaning Mechanical Locking Bars 1.5 MB |
---|---|
1937 | Gages for Mechanical Locking 2.4 MB |
1935 | Mechanical Color Light Signals in England 1.3 MB |
---|
1947 | Hoosac Tunnel Interlocking and CTC 1.7 MB |
---|
1922 | Signal Construction on the Santa Fe 797.6 KB |
---|
1939 | Phantom Indications in Color-Light Signals 2.2 MB |
---|
1945 | CTC West of the Pecos On the Santa Fe 4.6 MB |
---|
1922 | Signal Construction on the Santa Fe 797.6 KB |
---|
1950 | SS Protection 2.1 MB |
---|
1925 | CB&Q Controls Switches Remotely 3.7 MB |
---|
1911 | A Summary of Signaling Practice 3.6 MB |
---|
1947 | Annual Review and Outlook 425.1 KB |
---|
1950 | Microwaves on Railroads 1.3 MB |
---|
1909 | Train staff installation on the NYNH&H 1.0 MB |
---|
1937 | APB, Remote Control, and CTC on the Baltimore & Ohio 11.9 MB |
---|
1919 | Block Signaling Practice on a British Railway (Part 1) 294.2 KB |
---|---|
1919 | Block Signaling Practice on a British Railway (Part 2) 475.1 KB |
1919 | Block Signaling Practice on a British Railway (Part 3) 327.2 KB |
1949 | An Unusual Automatic Plant 4.5 MB |
---|---|
1937 | CTC On the Denver & Rio Grande Western 8.0 MB |
1944 | Military Railway Service in Italy Installs Electric Interlocking 5.6 MB |
---|---|
1943 | Railway Signaling in North Africa 3.5 MB |
1948 | CTC Big Help to GM&O 1.7 MB |
---|
1925 | Multiple Track Operation by Signal Indication 2.7 MB |
---|
1921 | A New Idea in Traffic Locking On the C&O 1.7 MB |
---|
1954 | Automatic Gates Increase Safety 3.2 MB |
---|---|
1926 | Electric Plant Replaces Three Mechanical Interlockings 3.0 MB |
1917 | New Interlocking Plant in Milwaukee 1.2 MB |
1935 | New Signaling on the Route of the C&NW "400" 9.6 MB |
1935 | Safety of High Speed Trains 5.2 MB |
1935 | Signaling for Higher Train Speeds 3.0 MB |
1935 | The "400" to Run on Six and One Half Hour Schedule 942.0 KB |
1952 | Speed Control Installed on the Long Island 1.3 MB |
---|
1935 | Safety of High Speed Trains 5.2 MB |
---|---|
1935 | Signaling for Higher Train Speeds 3.0 MB |
1932 | Miniature Signal System a Hobby 606.4 KB |
---|
1935 | Accident at Automatic Plant 4.5 MB |
---|---|
1928 | Automatic Interlockers Are Profitable Investments 3.3 MB |
1939 | CTC and Automatic Signals on the Rock Island 6.6 MB |
1932 | Smashboard Mechanisms 1.7 MB |
1929 | Crossing Protection Installed Extensively on the Milwaukee 1.3 MB |
---|---|
1943 | Crossing Protection on Milwaukee 5.7 MB |
1928 | GN Replaces Semaphores with Color Light Signals 1.2 MB |
1935 | New Signaling on the Route of the C&NW "400" 9.6 MB |
1924 | NP Interlocking in Minneapolis 2.3 MB |
1935 | Safety of High Speed Trains 5.2 MB |
1949 | 192 Miles of Automatic Block On Soo Line 6.0 MB |
---|---|
1950 | Bootleg Risers and Bonds 2.1 MB |
1953 | Call-On Signals 354.5 KB |
1948 | Gates at Three Crossings on Soo Line 1.8 MB |
1911 | General News (August 1911) 559.3 KB |
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
1955 | Remote Control Eliminates Train Stops 1.3 MB |
1941 | Remote Control Installation 2.4 MB |
1933 | Remote Control on Soo Line 2.7 MB |
1952 | Soo Line Completes Signaling on 260 Miles of Single Track 737.7 KB |
1950 | Spring Switch Signaling 2.5 MB |
1947 | Territories Involved in the ICC Signaling Order 399.0 KB |
1947 | ICC Holds Signal Hearing 507.5 KB |
---|---|
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
1929 | D&RGW Expedites Trains With Centralized Control 2.1 MB |
---|
1932 | Speed Signaling in England 1.9 MB |
---|
1939 | Mission Tower Interlocking at Los Angeles 9.2 MB |
---|
1911 | Automatic Signals on the Northern Pacific 7.2 MB |
---|
1956 | Centralia Has Protection of All Crossings 6.7 MB |
---|
1945 | ICC Calls For Switch Locks 1.5 MB |
---|---|
1925 | Preliminary Report on C&NW Train Control 929.6 KB |
1934 | Automatic Plant Replaces Mechanical Interlocking on Alton & Southern 1.2 MB |
---|---|
1928 | Color Light Train Order Signals Are Effective 2.9 MB |
1915 | Electric Interlocking at Davis, IL 766.6 KB |
1944 | L&N Installs CTC On an Engine District 9.0 MB |
---|---|
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
1947 | Annual Review and Outlook 425.1 KB |
---|---|
1947 | Milwaukee Installs Block System on 98 Miles 1.2 MB |
1937 | Changes on the New York Central Lines 2.3 MB |
---|---|
1937 | J. C. Mock Retires 1.4 MB |
1940 | Personal: Changes on the New York Central 2.2 MB |
1911 | Railway Signal Association Convention: Committee I: Signaling Practice 3.8 MB |
1924 | Study of Train Control on the Michigan Central 2.1 MB |
1940 | Plug Couplers for Relays and Signals 1.3 MB |
---|
1934 | An Electric Interlocking on the Southern Pacific 1.8 MB |
---|---|
1936 | New Electric Interlocking and Signaling at the Mississippi River Bridge at New Orleans 7.9 MB |
1923 | News of the Month (November 1923) 1.8 MB |
1923 | News of the Month (October 1923) 1.9 MB |
1929 | NYC Expands Electric Plant By Adding 48 Levers 2.7 MB |
1940 | Controller Adjuster 1.3 MB |
---|---|
1936 | Semaphore Type Crossing Gate Developed on the Alton 8.3 MB |
1935 | Snubbing Rectifier for 2A Signal 1.9 MB |
1935 | New York Central Extends South Bend Interlocking 6.0 MB |
---|---|
1936 | New York Central Interlocking at Syracuse 15.9 MB |
1956 | Plastic Track Model Is Big Picture for Levermen 1.4 MB |
---|---|
1941 | Track Model Lamps 429.7 KB |
1932 | Miniature Signal System a Hobby 606.4 KB |
---|---|
1941 | Railway Exhibit Presented to Museum of Science and Industry 636.5 KB |
1966 | Modular signal design is here 1.7 MB |
---|
1941 | Automatic Signaling and Tunnel Protection On the Denver & Salt Lake 6.7 MB |
---|---|
1950 | CTC Extended on the Rio Grande 4.4 MB |
1943 | CTC on 107 Miles of Single-Track on the Rio Grande 9.7 MB |
1946 | CTC on 128 Miles of Denver & Salt Lake 10.1 MB |
1944 | Rio Grande has Longest CTC 9.2 MB |
1944 | Signals Direct Trains at Junction On the Denver & Rio Grande Western and the Denver & Salt Lake 2.8 MB |
1947 | ICC Holds Signal Hearing 507.5 KB |
---|---|
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
1943 | Lap Order Results in an Accident 818.6 KB |
---|
1923 | Signaling Increases Capacity of Three Tracks 7.3 MB |
---|
1937 | New Signaling on Pennsylvania 1.0 MB |
---|
1932 | A Detector Bar Fails 1.5 MB |
---|---|
1917 | Block Signals on the Monon 669.9 KB |
1942 | Chicago, Indianapolis & Louisiville Modernizes Automatic Signaling 3.9 MB |
1950 | Differentiation Between Signals 955.8 KB |
1908 | Electro-Pneumatic Interlocking Plant On the Chicago & Western Indiana Railroad at 47th Street, Chicago 3.9 MB |
1952 | Interlockings Modernized at Three Railroad Crossings 974.7 KB |
1927 | Miller Train Control On the Monon 582.2 KB |
1941 | Monon Changes Approved 760.8 KB |
1945 | Monon Remote Control Signaling Saves Train Time 3.5 MB |
1925 | The Train Control Situation 853.0 KB |
1928 | Train Order Indicators Used Successfully on the CI&L 604.3 KB |
1942 | Chicago, Indianapolis & Louisiville Modernizes Automatic Signaling 3.9 MB |
---|---|
1927 | Miller Train Control On the Monon 582.2 KB |
1941 | Monon Changes Approved 760.8 KB |
1940 | New Automatic Block Signaling on the Milwaukee 6.3 MB |
---|
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
---|
1952 | Speed Control Installed on the Long Island 1.3 MB |
---|
1944 | L&N Installs CTC On an Engine District 9.0 MB |
---|
1950 | CTC on the Wabash 2.6 MB |
---|
1949 | A Mile-Stone In Signaling 1.2 MB |
---|---|
1944 | Canadian National installs new type of all-relay interlocking at Montreal 7.0 MB |
1950 | Consolidation of Interlockings 2.5 MB |
1936 | Yard Entrance in Montreal Remotely Controlled 8.2 MB |
1949 | Communications Trouble 2.0 MB |
---|
1935 | Automatic Interlocking on the Wabash 2.9 MB |
---|
1953 | News 2.2 MB |
---|---|
1935 | Night Check of Signal Lights 1.2 MB |
1935 | Accident at Automatic Plant 4.5 MB |
---|---|
1935 | Improving Automatic Interlockings 3.5 MB |
1941 | DT&I Installs Automatic Interlocking 5.0 MB |
---|
1937 | New Signaling on Pennsylvania 1.0 MB |
---|---|
1938 | Pennsylvania Electrification Signaling 5.3 MB |
1944 | Centennial of Morse Telegraph 6.6 MB |
---|---|
1944 | St. Louis-San Francisco Installs Centralized Traffic Control 1.1 MB |
1954 | Motor Car Indicator 813.5 KB |
---|
1949 | 625 Miles of CTC in one Stretch 7.9 MB |
---|---|
1947 | CTC Has Long Sidings With Signals on the Santa Fe 2.1 MB |
1936 | Electric Lights for Semaphores and Train Approach Indicators on the Rock Island 8.9 MB |
1936 | Motor Car Indicators 2.9 MB |
1949 | New Automatic Block on the Katy 4.7 MB |
1949 | Signaling Saves Time on Frisco 4.8 MB |
1944 | St. Louis-San Francisco Installs Centralized Traffic Control 8.3 MB |
1949 | Train Indicator for Motor Car 1.0 MB |
1956 | Union Pacific Installs Protection For Motor Cars at Tunnels 3.2 MB |
1939 | Checking Track Circuits From a Motor Car 837.6 KB |
---|---|
1937 | Flag and Torpedo Containers 903.1 KB |
1935 | Multiple-Block Signaling 7.0 MB |
---|---|
1931 | New York Central Re-Signals Track Entering Grand Central Terminal 4.0 MB |
1931 | The Mott Haven Interlocking 3.7 MB |
1958 | C&O Has Good Ideas in CTC 2.5 MB |
---|---|
1928 | Pere Marquette Installs Centralized Control Signal System 3.2 MB |
1944 | New York Central Modernizes an Interlocking 5.0 MB |
---|
1948 | CTC Big Help to GM&O 1.7 MB |
---|
1950 | Audible Warning Sounded When Dragging Equipment Detectors Operate 4.2 MB |
---|---|
1935 | Checking Rail Ends on Drawbridges 2.5 MB |
1949 | Fast Work Laying Submarine Cable 3.1 MB |
1935 | Interlocking on Southern Pacific Suisun Bay Bridge 4.6 MB |
1935 | Collision on the Erie 2.2 MB |
---|
1910 | The Multiple Unit Electric Interlocking Machine 1.5 MB |
---|
1935 | Letter to the Editor- Comment on Multiple Aspects 1.5 MB |
---|---|
1943 | Modernization of Automatic Signaling On the New York Central 9.8 MB |
1935 | Multiple Aspect Signaling 3.3 MB |
1935 | Multiple-Block Signaling 7.0 MB |
1943 | New Haven Installs Five-Aspect Signaling Controlled By Coded Track Circuits 7.4 MB |
1944 | New York Central Installs Coded Track Circuits 3.9 MB |
1909 | Union Switch & Signal’s Inspection Trip 1.5 MB |
---|
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
---|
1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
---|
1948 | CTC Big Help to GM&O 1.7 MB |
---|
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
---|
1937 | APB, Remote Control, and CTC on the Baltimore & Ohio 11.9 MB |
---|