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.
1957 | Consolidation Cuts Costs 3.1 MB |
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1947 | Railroads Request Relief from the ICC Signal Order 465.0 KB |
1925 | CB&Q Controls Switches Remotely 3.7 MB |
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1928 | Signaling Half a Century Ago 1.1 MB |
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1934 | Automatic Crossing Gates on Illinois Central 2.7 MB |
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1942 | Automatic Signal Program on the Illinois Central 4.6 MB |
1937 | Remote Control on the Pennsylvania 5.2 MB |
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1937 | APB, Remote Control, and CTC on the Baltimore & Ohio 11.9 MB |
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1934 | Automatic Plant Replaces Mechanical Interlocking on Alton & Southern 1.2 MB |
1950 | Crossing Protection With Indicators for Train Movements 4.5 MB |
1954 | CTC Increases Capacity of Double Track 4.2 MB |
1925 | IC Markham contracts: News of the Month (June 1925) 579.3 KB |
1929 | Report on B&O Head-End Collision at East St. Louis 1.1 MB |
1949 | Signaling Saves Time on Frisco 4.8 MB |
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1935 | Crossing Bells at Flasher Signals 1.9 MB |
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1931 | Competition 774.2 KB |
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1925 | Report on Economics of Signaling 606.1 KB |
1932 | Reverting to Single Track 646.7 KB |
1928 | Signaling Is an Aid to Greater Equipment Utilization 486.1 KB |
1938 | The Outlook for Signaling 1.3 MB |
1928 | What Is the Cost of a Train Stop? 463.2 KB |
1937 | Three Gate Crossings in a Row 4.2 MB |
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1953 | IC Installs Automatic Block 4.0 MB |
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1936 | C&O Remote Control 12.8 MB |
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1936 | New Interlocking Machines Abroad 1.3 MB |
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1931 | Thomas A. Edison (obituary) 1.1 MB |
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1946 | Improved Signal Performance 446.8 KB |
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1911 | General News (August 1911) 559.3 KB |
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1947 | Annual Review and Outlook 425.1 KB |
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1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
1936 | Approach Electric Lighting On the Erie 2.7 MB |
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1939 | Electric Lights for Semaphores 1.9 MB |
1937 | Electric Signal Lights in Austria 1.2 MB |
1939 | Recording Burning Time of Electric Lights 900.6 KB |
1947 | All-Relay Interlocking Replaces Mechanical Plant 1.5 MB |
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1943 | Centralized Traffic Control Installed on 39 Miles of the Burlington 6.1 MB |
1949 | Coast Line Replaces Signaling On Engine District 8.1 MB |
1949 | CTC Increases Capacity of Single-Track Freight Line Handling Heavy Traffic 6.1 MB |
1935 | Depression Operation of Interlocking 2.6 MB |
1944 | Emergency Release for Switch Lock 1.3 MB |
1940 | Entering the Main Line 1.3 MB |
1950 | Modern Signaling Systems On Western Pacific 16.1 MB |
1937 | New Devices- March 1937 18.1 MB |
1943 | Norfolk & Western Installs CTC on 14 Miles of Single Track 4.4 MB |
1944 | Santa Fe Installs CTC on 115.6 Miles Los Angeles to San Diego 7.2 MB |
1944 | St. Louis Southwestern Installs Centralized Traffic Control 6.9 MB |
1937 | Electric Switch Lamps on the Santa Fe 4.5 MB |
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1915 | Electric Train Staff Installation 3.3 MB |
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1943 | Railway Signaling in North Africa 3.5 MB |
1911 | The Staff System on the Southern Pacific 4.0 MB |
1909 | Train staff installation on the NYNH&H 1.0 MB |
1911 | General News (August 1911) 559.3 KB |
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1915 | Extension of New Haven signals 684.8 KB |
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1917 | Light Signals On CM&StP 781.9 KB |
1937 | New Signaling on Pennsylvania 1.0 MB |
1924 | Signal Development in Connection With Single Phase Propulsion 5.1 MB |
1920 | The New Electrification on the St. Paul 485.4 KB |
1921 | Progress of Railroad Signaling in America 731.8 KB |
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1912 | The Automatic Signal and the Local Circuit 1.9 MB |
1936 | North Western Installs Automatic Gates 15.9 MB |
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1920 | Electro-Mechanical Interlocker at Sunbury, PA 538.5 KB |
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1915 | Extension of New Haven signals 684.8 KB |
1925 | Inter-Control of Electric and Mechanical Functions at Interlocking Plants 1.6 MB |
1952 | Interlockings Modernized at Three Railroad Crossings 974.7 KB |
1921 | New Interlockings at Jacksonville Terminal 3.4 MB |
1915 | Switch and Lock Movements in Mechanical Plants 2.0 MB |
1923 | The Why of an Electro-Mechanical Plant 1.2 MB |
1915 | Trenton Electro-Mechanical Interlocking 1.7 MB |
1946 | War-Time Replacement of Interlocking on Pere Marquette 3.4 MB |
1944 | Electronics In Signaling 709.8 KB |
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1956 | No Waiting for Reservations 6.3 MB |
1944 | Railroad Applications of Electronics 1.9 MB |
1926 | C&NW Replaces Highway Crossing Gates With Wig-Wags 2.0 MB |
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1927 | Comparative Maintenance Costs of Signaling on the CM&StP 2.9 MB |
1922 | Train Control on the C&NW 824.8 KB |
1947 | Drawbridge Interlocking on the Elgin, Joliet & Eastern 647.3 KB |
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1938 | EJ&E Installs APB Signaling 3.1 MB |
1953 | Electronics at Work in EJ&E Yard 7.8 MB |
1934 | Elgin, Joliet & Eastern Installs Electric Interlocking at Drawbridge 2.3 MB |
1950 | Grade Signal Controls 2.1 MB |
1949 | Loudspeakers on the "J" 7.9 MB |
1935 | Purple Signal Glasses 3.3 MB |
1950 | Signals for Trains at Highway Crossings 5.9 MB |
1934 | Spring Derail for Drawbridge Protection 535.0 KB |
1934 | Trainmen Control Highway Crossing Signals on EJ&E 1.4 MB |
1920 | What Scheme of Signaling is Most Desirable? 6.8 MB |
1932 | Improper Forestalling 669.7 KB |
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1957 | Pushbutton CTC Machine on NYC Is First of Its Kind 3.3 MB |
1956 | Three Signal Shops into One 7.0 MB |
1940 | Personal: Changes on the New York Central 2.2 MB |
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1911 | Automatic Signals on the Chicago Great Western 7.4 MB |
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1925 | Color-Light Signals on C&NW 6.9 MB |
1913 | New Block Signaling on the North-Western 1.8 MB |
1936 | Interlocking and Remote Control on Erie 18.9 MB |
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1937 | What is in Store for the Signal Field? 1.8 MB |
1952 | Gates at Eight Street Crossings on the Milwaukee Road 503.5 KB |
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1916 | New Automatic Signals on Grand Trunk 991.7 KB |
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1937 | Changes on the New York Central Lines 2.3 MB |
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1940 | Personal: Changes on the New York Central 2.2 MB |
1938 | Signaling for Higher Train Speeds 3.9 MB |
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1956 | Train Operations When CTC Fails 3.5 MB |
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1956 | Train Operations When CTC Fails 2.4 MB |
1935 | Highway Crossing Protection With Federal Funds 2.9 MB |
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1935 | The Federal Crossing Protection Program 1.6 MB |
1922 | Signal Construction on the Santa Fe 797.6 KB |
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1921 | A Complete Train Despatching System 1.7 MB |
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1938 | Pennsylvania Electrification Signaling 5.3 MB |
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1936 | NX Electric Interlocking 3.8 MB |
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1954 | New Wayside and Cab Signaling 753.2 KB |
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1954 | CTC Moves Heavy Trains 4.1 MB |
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1955 | New York Central’s CTC – It’s Four Tracks to Two 4.1 MB |
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1957 | Where Two Tracks Do the Work of Four 3.2 MB |
1953 | CTC Keeps Trains Moving on Long Grades 6.3 MB |
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1950 | Train Movements by Signal Indication On the Clinchfield Route 12.0 MB |
1937 | Ohio Flood Damages Signaling 9.7 MB |
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1920 | Train Operation by Means of Signal Indications 2.4 MB |
1913 | New Block Signaling on the North-Western 1.8 MB |
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1921 | New Interlocking on the Boston Elevated 3.3 MB |
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1919 | A Peculiar Accident 251.7 KB |
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