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 1.1 MB |
---|
1925 | CB&Q Controls Switches Remotely 3.7 MB |
---|
1928 | Signaling Half a Century Ago 1.1 MB |
---|
1957 | CTC on the SP has special devices 518.8 KB |
---|---|
1959 | Fewer wayside observers makes automatic hazard detection necessary 1.1 MB |
1958 | RS&C 50th anniversary: Railroad communications ... from Morse to microwave 3.3 MB |
1958 | Signaling to cut expenses in '58 411.4 KB |
1909 | Train staff on DL&W 1.1 MB |
---|
1963 | S&C Role Is Basic To Bison Yard 3.0 MB |
---|---|
1960 | Signaling enters automation 630.6 KB |
1951 | South Shore Line Records Gate Operations 375.1 KB |
---|---|
1934 | Trainmen Control Highway Crossing Signals on EJ&E 1.4 MB |
1965 | Midwest RRs fight the weather 914.4 KB |
---|---|
1961 | News briefs. 1961-07 648.9 KB |
1965 | News briefs. 1965-07 788.2 KB |
---|
1934 | Automatic Crossing Gates on Illinois Central 2.7 MB |
---|---|
1942 | Automatic Signal Program on the Illinois Central 4.6 MB |
1958 | One track does work of two 521.4 KB |
---|
1961 | News briefs. 1961-07 648.9 KB |
---|
1937 | Remote Control on the Pennsylvania 5.2 MB |
---|
1964 | MP interlocking uses solid-state control system 410.9 KB |
---|---|
1965 | News briefs. 1965-01 2.0 MB |
1951 | Pennsylvania Exhibits Speed Control 512.5 KB |
---|
1964 | News briefs. 1964-10 768.6 KB |
---|
1949 | Signaling Saves Time on Frisco 4.8 MB |
---|
1958 | DL&W-Erie joint operation is ready to go 643.6 KB |
---|
1965 | Midwest RRs fight the weather 914.4 KB |
---|
1965 | News briefs. 1965-02 1.9 MB |
---|
1961 | Railroad Will Pay For CTC Out Of Accrued Savings 842.9 KB |
---|
1935 | Crossing Bells at Flasher Signals 1.9 MB |
---|
1931 | Competition 774.2 KB |
---|---|
1925 | Report on Economics of Signaling 606.1 KB |
1932 | Reverting to Single Track 646.7 KB |
1958 | RS&C 50th anniversary: Looking ahead 652.9 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 |
1963 | News briefs. 1963-05 720.2 KB |
---|
1937 | Three Gate Crossings in a Row 4.2 MB |
---|
1959 | Santa Fe CTCs double track line 2.2 MB |
---|
1962 | News briefs. 1962-02 1.4 MB |
---|---|
1962 | News briefs. 1962-09 829.8 KB |
1953 | IC Installs Automatic Block 4.0 MB |
---|
1959 | Now: Instant hotbox location 829.3 KB |
---|
1936 | C&O Remote Control 12.8 MB |
---|
1936 | New Interlocking Machines Abroad 1.3 MB |
---|
1931 | Thomas A. Edison (obituary) 1.1 MB |
---|
1961 | News briefs. 1961-11 1.3 MB |
---|---|
1964 | News briefs. 1964-02 981.5 KB |
1946 | Improved Signal Performance 446.8 KB |
---|
1911 | General News (August 1911) 557.3 KB |
---|
1964 | News briefs. 1964-09 879.4 KB |
---|---|
1965 | News briefs. 1965-01 2.0 MB |
1958 | MP consolidates CTC machines 797.2 KB |
---|
1962 | Automatic Dispatching 2.1 MB |
---|---|
1962 | Centralization – Dispatch Circuits Are Changing 1.3 MB |
1960 | News briefs. 1960-08 603.8 KB |
1962 | SP Has 500 Miles of Automatic CTC 363.6 KB |
1935 | Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB |
1962 | Automatic Dispatching 2.1 MB |
---|
1947 | Annual Review and Outlook 425.1 KB |
---|---|
1948 | Rock Island Adapts CTC to Medium-Traffic Single-Track Line 1.3 MB |
1949 | Signaling Adapted to Traffic On the Rock Island 5.2 MB |
1964 | News briefs. 1964-08 811.5 KB |
---|
1936 | Approach Electric Lighting On the Erie 2.7 MB |
---|---|
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 |
1957 | What's the answer: Slotting relay? 361.2 KB |
---|
1937 | Electric Switch Lamps on the Santa Fe 4.5 MB |
---|---|
1963 | Special Report: P&LE Signaling and Communications 3.9 MB |
1947 | Crossover protection on the GM&O 2.6 MB |
---|---|
1951 | Double to Single Track 60 Miles on the Erie 1.1 MB |
1951 | New Interlocking in Holland 1.0 MB |
1915 | Electric Train Staff Installation 3.3 MB |
---|---|
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 |
1909 | Train staff on DL&W 1.1 MB |
1916 | AC Signaling for Chicago Terminals 585.7 KB |
---|---|
1951 | Extension of Color-Light Signaling on the Bombay, Baroda & Central India Railway 524.0 KB |
1915 | Extension of New Haven signals 684.8 KB |
1915 | First Position Light Signal Installation 580.6 KB |
1917 | Light Signals On CM&StP 781.9 KB |
1937 | New Signaling on Pennsylvania 1.0 MB |
1916 | Reconstruction of New Haven Signals 315.5 KB |
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 |
---|---|
1912 | The Automatic Signal and the Local Circuit 1.9 MB |
1936 | North Western Installs Automatic Gates 15.9 MB |
---|
1920 | Electro-Mechanical Interlocker at Sunbury, PA 538.5 KB |
---|---|
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 |
1955 | News briefs. 1955-08 830.4 KB |
1960 | News briefs. 1960-05 1.0 MB |
1964 | News briefs. 1964-06 812.0 KB |
1958 | RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB |
1959 | Santa Fe CTCs double track line 2.2 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 |
1916 | AC Signaling in the Centre Street Loop 924.9 KB |
---|
1962 | News briefs. 1962-09 829.8 KB |
---|
1962 | Electronic Interlocking 2.2 MB |
---|---|
1961 | News briefs. 1961-02 1.4 MB |
1962 | Electronic Track Circuits 740.3 KB |
---|---|
1958 | RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB |
1959 | Signaling moderate during '58 528.6 KB |
1957 | Track circuit developments in Europe 234.8 KB |
1954 | Modern Signaling in New Subways in Stockholm, Sweden 6.7 MB |
---|---|
1955 | Much is new in signaling for 1955 826.7 KB |
1944 | Electronics In Signaling 709.8 KB |
---|---|
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 |
---|---|
1927 | Comparative Maintenance Costs of Signaling on the CM&StP 2.9 MB |
1922 | Train Control on the C&NW 824.8 KB |
1917 | Wigwag signals on an Electric Line 239.2 KB |
1947 | Drawbridge Interlocking on the Elgin, Joliet & Eastern 647.3 KB |
---|---|
1938 | EJ&E Installs APB Signaling 3.1 MB |
1962 | EJ&E Uses Tone Coding to Get Systems on One RF Channel 562.3 KB |
1910 | Electric Interlocking at Griffith, Indiana 964.1 KB |
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 |
1955 | Much is new in signaling for 1955 826.7 KB |
1963 | News briefs. 1963-10 497.4 KB |
1935 | Purple Signal Glasses 3.3 MB |
1958 | RS&C 50th anniversary: Signaling ... manual to automatic 2.0 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 |
1958 | What's the answer? Crossing indicators 509.4 KB |
1947 | Choice of Interlocking Control Machines 266.5 KB |
---|---|
1927 | CNJ Completes Interlocking to Safeguard Newark Bay Bridge 4.4 MB |
1958 | Central opens Young Yard 2.5 MB |
---|---|
1959 | How retarder controls function at Young Yard on the NYC 978.1 KB |
1932 | Improper Forestalling 669.7 KB |
1912 | New Single Track Signals on the Lake Shore 283.2 KB |
1957 | Pushbutton CTC Machine on NYC Is First of Its Kind 3.3 MB |
1958 | RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB |
1959 | Signaling moderate during '58 528.6 KB |
1958 | Signaling to cut expenses in '58 411.4 KB |
1956 | Three Signal Shops into One 7.0 MB |
1963 | News briefs. 1963-08 1.2 MB |
---|
1940 | Personal: Changes on the New York Central 2.2 MB |
---|
1911 | Automatic Signals on the Chicago Great Western 7.4 MB |
---|---|
1925 | Color-Light Signals on C&NW 6.9 MB |
1913 | New Block Signaling on the North-Western 1.8 MB |
1962 | News briefs. 1962-11 468.1 KB |
1964 | News briefs. 1964-06 812.0 KB |
1958 | DL&W-Erie joint operation is ready to go 643.6 KB |
---|---|
1936 | Interlocking and Remote Control on Erie 18.9 MB |
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 |
---|
1916 | New Automatic Signals on Grand Trunk 997.0 KB |
---|
1937 | Changes on the New York Central Lines 2.3 MB |
---|---|
1940 | Personal: Changes on the New York Central 2.2 MB |
1964 | Milwaukee installs its first microwave 277.4 KB |
---|
1938 | Signaling for Higher Train Speeds 3.9 MB |
---|
1964 | NYC Moves CTC Point of Control 1.2 MB |
---|
1956 | Train Operations When CTC Fails 3.5 MB |
---|---|
1956 | Train Operations When CTC Fails 2.4 MB |
1935 | Highway Crossing Protection With Federal Funds 2.9 MB |
---|---|
1935 | The Federal Crossing Protection Program 1.6 MB |
1965 | Collision due to signal failure 647.8 KB |
---|
1955 | CTC and cab signaling on Union Pacific 789.5 KB |
---|
1922 | Signal Construction on the Santa Fe 797.6 KB |
---|
1958 | DL&W-Erie joint operation is ready to go 643.6 KB |
---|
1921 | A Complete Train Despatching System 1.7 MB |
---|---|
1960 | British install automatic yard near London 348.3 KB |
1958 | Programmed interlocking control 337.6 KB |
1958 | RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB |
1958 | Central opens Young Yard 2.5 MB |
---|
1962 | Centralization – Dispatch Circuits Are Changing 1.3 MB |
---|
1938 | Pennsylvania Electrification Signaling 5.3 MB |
---|
1960 | British open new class yard 240.4 KB |
---|---|
1962 | News briefs. 1962-05 826.8 KB |
1936 | NX Electric Interlocking 3.8 MB |
1958 | RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB |
1954 | New Wayside and Cab Signaling 753.2 KB |
---|
1954 | CTC Moves Heavy Trains 4.1 MB |
---|
1962 | Electric Switch Lamp Lighting Helps Reduce Operating Expense 661.7 KB |
---|---|
1960 | Erie installs its first hotbox detector 462.1 KB |
1961 | News briefs. 1961-07 648.9 KB |
1961 | News briefs. 1961-10 1.0 MB |
1962 | News briefs. 1962-07 494.2 KB |
1963 | News briefs. 1963-03 790.6 KB |
1963 | News briefs. 1963-07 489.2 KB |
1963 | News briefs. 1963-11 1.4 MB |
1964 | News briefs. 1964-09 879.4 KB |
1965 | News briefs. 1965-02 1.9 MB |
1963 | S&C Role Is Basic To Bison Yard 3.0 MB |
1960 | Signaling enters automation 630.6 KB |
1961 | Snow Detectors 231.2 KB |
1961 | Survey Tells How Railroads Use Hotbox Detectors 1.8 MB |
1961 | What’s the Answer? 1961-04 960.3 KB |
1957 | Bessemer takes up second track and installs Centralized Traffic Control 700.5 KB |
---|---|
1955 | New York Central’s CTC – It’s Four Tracks to Two 4.1 MB |
1955 | News briefs. 1955-08 830.4 KB |
1960 | News briefs. 1960-09 756.9 KB |
1965 | News briefs. 1965-06 1.2 MB |
1964 | NYC Moves CTC Point of Control 1.2 MB |
1957 | Where Two Tracks Do the Work of Four 3.2 MB |
1916 | William Robinson, Inventor of the Track Circuit 373.1 KB |
1953 | CTC Keeps Trains Moving on Long Grades 6.3 MB |
---|---|
1960 | Long-distance hot box detection 861.0 KB |
1950 | Train Movements by Signal Indication On the Clinchfield Route 12.0 MB |
1947 | ICC Signal Hearings 179.7 KB |
---|
1948 | CTC Big Help to GM&O 1.7 MB |
---|
1963 | News briefs. 1963-01 951.3 KB |
---|
1964 | News briefs. 1964-02 981.5 KB |
---|---|
1964 | News briefs. 1964-04 1.3 MB |
1965 | News briefs. 1965-05 1.4 MB |
1958 | Programmed interlocking control 337.6 KB |
---|
1947 | CTC Down by the Ohio 2.7 MB |
---|---|
1948 | CTC Keeps ‘em Rollin’ on C&EI 2.1 MB |
1937 | Ohio Flood Damages Signaling 9.7 MB |
1920 | Train Operation by Means of Signal Indications 2.4 MB |
1913 | New Block Signaling on the North-Western 1.8 MB |
---|
1921 | New Interlocking on the Boston Elevated 3.3 MB |
---|
1964 | News briefs. 1964-08 811.5 KB |
---|
1965 | News briefs. 1965-11 1.2 MB |
---|
1965 | News briefs. 1965-10 1.1 MB |
---|
1919 | A Peculiar Accident 251.7 KB |
---|
1965 | AFO circuits can be used in subways 682.4 KB |
---|---|
1965 | News briefs. 1965-11 1.2 MB |