Railway Signaling: D

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"D" Tower, Grafton, WV 1
1965 B&O would have used radio orders   573.9 KB
Daggett, CA 2
1944 Track Circuits on Passing Tracks in CTC Territory   941.8 KB
1943 Union Pacific Installs CTC on 175 Miles of Single Track   13.2 MB
Dakota Jct., NE 1
1924 Low-Voltage Interlocking on C&NW   1.6 MB
Dale, WY 1
1955 CTC and cab signaling on Union Pacific   789.5 KB
Dalies, AZ 1
1961 Santa Fe Signals New Main Line   913.2 KB
Dalies, OK 1
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
Dallas Union Terminal 2
1962 News briefs. 1962-05   826.8 KB
1936 Reconstruction of Interlocking at the Dallas Union Terminal   14.8 MB
Dallas, TX 5
1935 Centralized Traffic Control on the Texas & Pacific   5.1 MB
1935 Collision on the T&P   2.0 MB
1936 Reconstruction of Interlocking at the Dallas Union Terminal   14.8 MB
1955 Santa Fe installs CTC on single track   610.2 KB
1949 Signaling Adapted to Traffic On the Rock Island   5.2 MB
Dalton, GA 1
1955 What CTC did for the Dixie Line   889.8 KB
Dalton, PA 2
1961 News briefs. 1961-07   648.9 KB
1962 News briefs. 1962-07   494.2 KB
Danville Jct., IL 1
1947 All-Relay Plant on the C&EI at Danville, Ill   915.6 KB
Danville, IL 12
1947 All-Relay Plant on the C&EI at Danville, Ill   915.6 KB
1911 Automatic Signals on Vermillion River Bridge   986.3 KB
1931 Centralized Traffic Control Installed on Wabash   5.6 MB
1948 CTC Keeps ‘em Rollin’ on C&EI   2.1 MB
1925 Division Train Control Installation on C&EI Approved by ICC   2.9 MB
1960 News briefs. 1960-10   1.8 MB
1960 News briefs. 1960-11   875.5 KB
1961 News briefs. 1961-03   1.0 MB
1965 News briefs. 1965-07   788.2 KB
1930 Remotely Controlled Signals Replace Manual Block Station on New York Central   1.2 MB
1911 Signaling on the Illinois Traction System   1.5 MB
1926 Train Control Progress in 1925   3.1 MB
Davenport, IA 1
1916 Government Drawbridge Signaling   670.2 KB
Davenport, Rock Island & North Western 1
1960 Fourteen RRs adopt new operating code   945.4 KB
Davenport, Rock Island & Northwestern 1
1941 Protection at 38 Street Crossings In and Near Rock Island, Ill   3.1 MB
Davis equation 2
1960 Computer analyzes train operation   1.2 MB
1959 Computer simulates train operation   524.0 KB
Davis, DE 1
1936 Remote Control on the Pennsylvania   14.5 MB
Davis, IL 2
1948 CTC Big Help to GM&O   1.7 MB
1915 Electric Interlocking at Davis, Illinois   241.3 KB
Davis, IN 1
1960 News briefs. 1960-03   1.9 MB
Davis, Indianapolis, IN 1
1961 News briefs. 1961-07   648.9 KB
Dayton Ave., Los Angeles, CA 1
1934 An Electric Interlocking on the Southern Pacific   1.8 MB
Dayton Union 1
1951 "Central" Increases Safety at Highway Crossings in Dayton   1.0 MB
Dayton Union Terminal 1
1933 New Interlockers – Reversion to Single Track   418.4 KB
Dayton, OH 5
1951 "Central" Increases Safety at Highway Crossings in Dayton   1.0 MB
1947 Choice of Interlocking Control Machines   266.5 KB
1960 News briefs. 1960-09   756.9 KB
1929 Pennsylvania Installs APB Signaling on 86 Miles   3.7 MB
1955 Pennsylvania installs wayside equipment for cab signaling   745.7 KB
Dayton, TX 1
1935 Switch-Stand Selector   1.9 MB
DB Tower, WV 1
1943 Centralized Traffic Control Installed on the Virginian   7.0 MB
DC coded track circuits 1
1940 11,000-Ft. Coded Track Circuits   13.6 MB
DC coding units 1
1940 Plug Couplers for Relays and Signals   1.3 MB
DC pulse code 1
1962 Remote Control Interlocking Has Time Division Multiplex System   846.3 KB
DC relay 1
1916 The New Ziegler Relay   396.2 KB
DC track circuits 1
1935 DC Track Circuits   963.2 KB
De Beque, CO 1
1955 One CTC Machine Replaces Three   451.9 KB
De Coursey Yard, Latonia, KY 1
1963 News briefs. 1963-03   790.6 KB
De Coursey, KY 3
1960 News briefs. 1960-07   845.4 KB
1962 News briefs. 1962-04   1.2 MB
1965 News briefs. 1965-02   1.9 MB
De Graff, OH 1
1932 Big Four Uses Centralized Control For Remote Interlocking   1.8 MB
De Kalb, IL 4
1958 Crossing protection program saves 59%   553.4 KB
1950 Longest Continuous Double-Track CTC Is on North Western   5.1 MB
1935 Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
1927 Unique Highway Crossing Signals Solve Traffic Problem   1.4 MB
De Queen, AR 1
1955 CTC moves trains on grades   762.8 KB
De Quincy, LA 2
1963 News briefs. 1963-08   1.2 MB
1963 News briefs. 1963-11   1.4 MB
dead sections 1
1958 What's the answer? Long dead sections   571.9 KB
Deal, VA 1
1962 News briefs. 1962-10   461.7 KB
Dearborn, MI 1
1946 DT&I Tests Radio   4.3 MB
Decatur, AR 1
1962 News briefs. 1962-02   1.4 MB
Decatur, IL 5
1945 Manual Block-Remote Control Developed On the Wabash   5.7 MB
1959 News briefs. 1959-05   506.5 KB
1937 Signal Construction on the Wabash   12.2 MB
1930 Wabash Tests Automatic Train Control with Cab-Lights   3.6 MB
1954 Wabash Yard Moves Expedited   1.2 MB
decoder units 1
1940 Coded Track Control   2.5 MB
Deen, CO 1
1929 D&RGW Expedites Trains With Centralized Control   2.1 MB
Deepwater, WV 1
1925 Position Light Take Siding Signal in Combination With Semaphore Installed on C&O   675.6 KB
Deer Lodge, MT 1
1917 Light Signals On CM&StP   781.9 KB
Deering, IL 1
1917 New C&NW Bascule Bridge Interlocking   761.1 KB
Delair, NJ 1
1965 News briefs. 1965-01   2.0 MB
Delano, MN 2
1957 GN CTC's 175 miles of mainline   635.9 KB
1960 News briefs. 1960-09   756.9 KB
Delano, VA 1
1950 Train Movements by Signal Indication On the Clinchfield Route   12.0 MB
Delavan, IL 1
1929 The Chicago & Alton Installs Mechanical Plant   1.3 MB
Delaware & Hudson 38
1925 Approach Locking Circuit That Is Dependent Upon Signal Position   648.1 KB
1947 Choice of Interlocking Control Machines   266.5 KB
1928 Circuit Polarity at Relay Contacts   526.2 KB
1955 CTC reduces operating expenses   431.8 KB
1932 CTC Studies   977.5 KB
1959 D&H upgrades crossing protection   626.4 KB
1960 How CTC affects D&H M/W work: Cuts costs   372.6 KB
1947 How Low Is a Dwarf?   438.7 KB
1958 Kink: Automatic control for waiting room   195.6 KB
1938 Light Signals as Train Order Signals   731.0 KB
1927 Multiplicity of Circuits for Operating Call-on Arms   1.5 MB
1955 News briefs. 1955-08   830.4 KB
1959 News briefs. 1959-05   506.5 KB
1960 News briefs. 1960-01   1.1 MB
1960 News briefs. 1960-02   995.4 KB
1960 News briefs. 1960-03   1.9 MB
1960 News briefs. 1960-06   1.2 MB
1961 News briefs. 1961-05   1.1 MB
1962 News briefs. 1962-02   1.4 MB
1962 News briefs. 1962-03   1.1 MB
1962 News briefs. 1962-06   989.1 KB
1963 News briefs. 1963-11   1.4 MB
1964 News briefs. 1964-02   981.5 KB
1965 News briefs. 1965-01   2.0 MB
1966 News briefs. 1966-01   1.4 MB
1931 Protecting CTC Switches   2.9 MB
1927 Several Effective Trap Circuit Schemes   1.4 MB
1927 Should Motor Car Operators Watch Signals More Carefully   1.2 MB
1960 Signal construction steady in 1959   385.2 KB
1933 Signal or Rule?   1.1 MB
1959 Signaling moderate during '58   528.6 KB
1961 Survey Tells How Railroads Use Hotbox Detectors   1.8 MB
1956 Switch Machines for CTC   2.0 MB
1938 The Outlook for Signaling   1.3 MB
1925 The Train Control Situation   853.0 KB
1926 Train Control Progress in 1925   3.1 MB
1915 Victoria Jubilee Bridge Protection   570.0 KB
1937 What is in Store for the Signal Field?   1.8 MB
Delaware River 1
1937 Delaware River Bridge Signaling   13.9 MB
Delaware Water Gap, PA 1
1958 News briefs. 1958-01   1.8 MB
Delaware, Lackawanna & Western 33
1908 A New 10,000 Line Telephone Exchange for Paris, France   2.2 MB
1924 Automatic Interlocker for a Crossing   3.4 MB
1951 Automatic-Manual Control for Gates at Five Crossings   418.2 KB
1935 Call-on Signal Involved In Accident   1.1 MB
1928 Continued Activity and Development in Signaling   1.1 MB
1926 Directing Trains By Signals   1.9 MB
1958 DL&W-Erie joint operation is ready to go   643.6 KB
1928 Emergency Release Circuits   2.4 MB
1959 Erie consolidates interlockings   440.6 KB
1936 Flood Damage to Signaling   5.0 MB
1927 How Many Signal Aspects and Indications?   2.4 MB
1936 Importance of Warning Whistle   6.8 MB
1936 Instructions for Crossing Protection in New York   1.8 MB
1937 J. C. Mock Retires   1.4 MB
1953 Lackawanna First to Install New Multiplex High Speed Code   4.6 MB
1957 Lehigh Valley combines interlockings   404.0 KB
1955 Much is new in signaling for 1955   826.7 KB
1935 Multiple Aspect Signaling   3.3 MB
1925 Multiple Track Operation by Signal Indication   2.7 MB
1958 News briefs. 1958-01   1.8 MB
1960 News briefs. 1960-04   896.6 KB
1931 Preparation of Signal Circuit Plans   2.0 MB
1921 Proposed Modification of Stop-and-Proceed Rule   1.4 MB
1936 Railroads Clean Up After Flood Waters   33.3 MB
1937 Shunt Sensitivity and Broken Rail Protection   4.3 MB
1930 Signal Aspects for a Four Block System   2.8 MB
1960 Signaling enters automation   630.6 KB
1922 Signaling Meadows Line of DL&W   7.9 MB
1936 The Delaware, Lackawanna & Western's Approach-Lighting System for Semaphore Signals   3.4 MB
1931 The Signaling of the Lackawanna Electrified Territory   5.9 MB
1926 Train Control Progress in 1925   3.1 MB
1909 Train staff on DL&W   1.1 MB
1923 Train-Order Signals at Interlockers   3.6 MB
Delaware, Lackawanna & WEstern 1
1960 Signal construction steady in 1959   385.2 KB
Delmar, IA 2
1928 Automatic Interlockers Are Profitable Investments   3.3 MB
1951 Single Track with CTC Replaces Double Track on Milwaukee   586.0 KB
Delphi, IN 1
1958 News briefs. 1958-01   1.8 MB
Delray, Detroit, MI 1
1955 Crossing protection for 16 streets   371.1 KB
Delray, MI 3
1926 DT&I Interlocking Machine Nickel-Plated When Rebuilt   602.1 KB
1946 DT&I Tests Radio   4.3 MB
1946 War-Time Replacement of Interlocking on Pere Marquette   3.4 MB
Delson, Quebec 1
1935 Mechanical Plant Replaced by Electric Interlocking   7.2 MB
Delta, MO 1
1941 Signaling on 47 Miles of St. Louis Southwestern   12.6 MB
Demopolis, AL 1
1962 News briefs. 1962-02   1.4 MB
Den Bosch 1
1951 New Interlocking in Holland   1.0 MB
Denison, IA 1
1965 News briefs. 1965-08   742.1 KB
Denison, TX 2
1949 New Automatic Block on the Katy   4.7 MB
1961 News briefs. 1961-10   1.0 MB
Denver & Rio Grande Western 34
1949 An Unusual Automatic Plant   4.5 MB
1950 Automatic Block Increases Safety on Paired Trackage   4.6 MB
1964 Automatic identity systems proposed   736.1 KB
1927 Control of Stop Indication in Approach-Lighted Territory   972.5 KB
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
1937 CTC On the Denver & Rio Grande Western   8.0 MB
1932 D&RGW Completes the Signaling of Its Main Line   2.6 MB
1929 D&RGW Expedites Trains With Centralized Control   2.1 MB
1933 Economics of Modern Signaling   2.1 MB
1954 Electric Interlocking on the Rio Grande   3.4 MB
1930 Letter to the Editor- APB Signal Indications   1.0 MB
1960 News briefs. 1960-10   1.8 MB
1961 News briefs. 1961-04   1.5 MB
1961 News briefs. 1961-10   1.0 MB
1965 News briefs. 1965-05   1.4 MB
1965 News briefs. 1965-06   1.2 MB
1955 One CTC Machine Replaces Three   451.9 KB
1961 Overlay Circuit Reduces Joints   306.6 KB
1944 Remote Control Interlocking on the D&RGW   4.3 MB
1944 Rio Grande has Longest CTC   9.2 MB
1958 RS&C 50th anniversary: Signaling ... manual to automatic   2.0 MB
1930 Should Signal Clear?   1.2 MB
1929 Signal Aspects at End of Double Track   514.3 KB
1933 Signal or Rule?   1.1 MB
1944 Signals Direct Trains at Junction On the Denver & Rio Grande Western and the Denver & Salt Lake   2.8 MB
1961 Survey Tells How Railroads Use Hotbox Detectors   1.8 MB
1947 Territories Involved in the ICC Signaling Order   388.2 KB
1930 Time-Table Schedules and Signal Indications   1.1 MB
1932 Track Capacity   2.7 MB
1937 What is in Store for the Signal Field?   1.8 MB
1959 What's the answer? Repeater signals   691.6 KB
1958 What's the answer? Snow on signals   711.5 KB
1929 Where Should Grade Signals Be Installed?   1.2 MB
Denver & Salt Lake 5
1941 Automatic Signaling and Tunnel Protection On the Denver & Salt Lake   6.7 MB
1950 CTC Extended on the Rio Grande   4.4 MB
1946 CTC on 128 Miles of Denver & Salt Lake   10.1 MB
1941 Non-Stop Permissive Signals   1.4 MB
1944 Signals Direct Trains at Junction On the Denver & Rio Grande Western and the Denver & Salt Lake   2.8 MB
Denver Union Terminal 1
1959 Signaling: 1960   225.2 KB
Denver, CO 7
1941 Automatic Signaling and Tunnel Protection On the Denver & Salt Lake   6.7 MB
1928 Burlington Completes Automatic Signals Chicago to Denver   5.1 MB
1950 CTC Extended on the Rio Grande   4.4 MB
1946 CTC on 128 Miles of Denver & Salt Lake   10.1 MB
1947 ICC Holds Signal Hearing   507.5 KB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
1935 Safety of High Speed Trains   5.2 MB
Depew, NY 1
1947 Large All-Relay Interlocking on the New York Central   2.5 MB
DeQueen, AR 1
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
DeQuincy, LA 1
1943 Signals Ordered on the Kansas City Southern   1.4 MB
derailment 1
1944 New York Central Installs NX Interlocking at Utica   5.7 MB
derails 3
1921 Derails: Are They Good or Bad?   350.6 KB
1939 ICC Permits Removal of Derails   1.1 MB
1929 The Year 1928 in Retrospect and the Outlook for 1929   1.5 MB
Derby Jct., CT 1
1960 News briefs. 1960-07   845.4 KB
Derby, CO 1
1947 Burlington Concentrates CTC Control at Division Headquarters   840.8 KB
Des Moines Union 1
1960 Fourteen RRs adopt new operating code   945.4 KB
Des Moines, IA 2
1932 A Call-On Signal Is Different from a Stop and Proceed Signal   667.6 KB
1935 Auto Stop Installed on C&NW   7.2 MB
Des Plaines Valley line 1
1911 General News (August 1911)   557.3 KB
Des Plaines, IL 7
1958 Crossing protection program saves 59%   553.4 KB
1943 Gates at Three Crossings on C&NW   3.4 MB
1948 Gates at Three Crossings on Soo Line   1.8 MB
1911 General News (August 1911)   557.3 KB
1913 New Block Signaling on the North-Western   1.8 MB
1919 The Night Signal Indication   335.6 KB
1931 Three-Track Signaling on 13.5 Miles of the C&NW   5.4 MB
Deshler, OH 1
1932 Centralized Traffic Control on the Baltimore & Ohio   4.4 MB
desk lever interlocking 5
1934 Desk-Lever Interlocking Installed on Canadian National   1.2 MB
1922 New Desk-Type Circuit Controller   1.6 MB
1958 RS&C 50th anniversary: Signaling ... manual to automatic   2.0 MB
1951 Simple Interlocking Saves Many Train Stops   370.2 KB
1929 Simplified Electric Interlocking Plant on Michigan Central.pdf   3.6 MB
detector bars 3
1932 A Detector Bar Fails   1.5 MB
1932 Detector Bars in 1932   419.4 KB
1935 New Interlocking in the Chicago Loop   4.0 MB
detector circuit 1
1959 Kinks. 1959-11   258.3 KB
detector locking 1
1959 Kinks. 1959-11   258.3 KB
Detroit & Toledo Shore Line 1
1947 Territories Involved in the ICC Signaling Order   388.2 KB
Detroit Belt 1
1936 Crossing Protection Includes Signals for Directing Trains   17.0 MB
Detroit River tunnel 3
1937 J. C. Mock Retires   1.4 MB
1940 New Interlockings at Windsor, Ont. On the Michigan Central   14.1 MB
1911 Railway Signal Association Convention: Committee I: Signaling Practice   3.8 MB
Detroit Union Belt 2
1955 Crossing protection for 16 streets   371.1 KB
1955 Interlocking Expedites Terminal Moves   1.6 MB
Detroit United 1
1915 New Interlockers on the Flint Belt Line   2.2 MB
Detroit, MI 16
1958 Central opens Young Yard   2.5 MB
1955 Crossing protection for 16 streets   371.1 KB
1936 Crossing Protection Includes Signals for Directing Trains   17.0 MB
1926 DT&I Interlocking Machine Nickel-Plated When Rebuilt   602.1 KB
1939 Interconnection of Train Signals and Crossing Protection   1.1 MB
1955 Interlocking Expedites Terminal Moves   1.6 MB
1931 Michigan Central Makes Extensive Improvements in Signaling System   3.3 MB
1960 News briefs. 1960-07   845.4 KB
1961 News briefs. 1961-11   1.3 MB
1953 Remote Control Interlockings Improve Terminal Operation   551.4 KB
1937 Route Control Interlocking – A New Signaling Development   2.9 MB
1960 Signal construction steady in 1959   385.2 KB
1959 Signaling moderate during '58   528.6 KB
1929 Simplified Electric Interlocking Plant on Michigan Central.pdf   3.6 MB
1924 Study of Train Control on the Michigan Central   2.1 MB
1946 War-Time Replacement of Interlocking on Pere Marquette   3.4 MB
Detroit, Toledo & Ironton 7
1959 AFO circuits protect crossing   554.0 KB
1941 DT&I Installs Automatic Interlocking   5.0 MB
1926 DT&I Interlocking Machine Nickel-Plated When Rebuilt   602.1 KB
1932 Electric Interlocking Constructed by the Nickel Plate   1.4 MB
1927 Half Interlocker on DT&I   565.6 KB
1963 News briefs. 1963-11   1.4 MB
1965 News briefs. 1965-07   788.2 KB
Dett, Rhodesia 1
1965 Rhodesia has 1215 miles of CTC   949.2 KB
Dett, Zimbabwe 1
1965 Rhodesia has 1215 miles of CTC   949.2 KB
Deutsche Reichsbahn 1
1929 Optical Features of German Train Control Reflect Ingenuity   3.6 MB
Deval, IL 1
1931 Three-Track Signaling on 13.5 Miles of the C&NW   5.4 MB
Devon, WV 1
1940 Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 MB
Dewey, IN 1
1948 CTC Keeps ‘em Rollin’ on C&EI   2.1 MB
Dexter Jct., MO 6
1954 CTC Increases Capacity of Double Track   4.2 MB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
1941 Signaling on 47 Miles of St. Louis Southwestern   12.6 MB
1944 St. Louis Southwestern Installs Centralized Traffic Control   6.9 MB
1944 Track Circuits on Passing Tracks in CTC Territory   941.8 KB
1957 Why Cotton Belt installed CTC on entire main line   914.0 KB
Dexter, MO 1
1954 Why Cotton Belt Installed CTC On 429 Miles of Single Track   4.0 MB
Diamond St., Philadelphia, PA 1
1964 Interlocking: New Solid State Coding System Is Fast   1.7 MB
Diaz, AR 1
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
diesel generator backup 1
1965 Rhodesia has 1215 miles of CTC   949.2 KB
digital simulation 1
1961 Digital Computer Simulates CTC Dispatcher   2.8 MB
Dillon, MO 2
1947 Frisco Moves CTC to One Office   481.1 KB
1944 St. Louis-San Francisco Installs Centralized Traffic Control   8.3 MB
Dillon, NM 1
1922 Signal Construction on the Santa Fe   797.6 KB
DIlworth, MN 1
1963 News briefs. 1963-10   497.4 KB
Dilworth, MN 1
1962 News briefs. 1962-07   494.2 KB
direct current relay 1
1916 The New Ziegler Relay   396.2 KB
disc signals 3
1950 CTC on the Reading   6.6 MB
1935 Obsolescence in Signaling   3.4 MB
1912 The Automatic Signal and the Local Circuit   1.9 MB
Disneyland 1
1959 Monorail is signaled electronically   573.9 KB
Disneyland monorail 1
1959 Monorail is signaled electronically   573.9 KB
dispatcher centralization 1
1965 Merging divisions require changing circuits   339.6 KB
dispatching circuits 1
1962 Centralization – Dispatch Circuits Are Changing   1.3 MB
distant signal repeaters 1
1959 What's the answer? Repeater signals   691.6 KB
distant signals 3
1957 How long sidings save train time   465.2 KB
1934 More on Distant Signals   598.6 KB
1940 Southern Pacific Petition Denied   3.0 MB
Divide, NY 1
1963 News briefs. 1963-04   889.2 KB
Divine, IL 1
1934 Spring Derail for Drawbridge Protection   535.0 KB
Division Street, Chicago, IL 3
1911 Interlocking on the North Western Terminal   7.6 MB
1925 Maintenance on C&NW Terminals   12.5 MB
1911 Signaling and Interlocking on the North Western Terminal in Chicago   1.1 MB
Dix, IN 1
1960 News briefs. 1960-07   845.4 KB
DK Cabin, WV 1
1955 C&O Consolidates Interlockings   3.2 MB
DM code transmitter 1
1940 New Code Transmitter   2.1 MB
DN-11 relay 1
1940 Plug Couplers for Relays and Signals   1.3 MB
DN-22L relay 1
1936 Light-out Relay for AC or DC   2.3 MB
DN-22P power transfer relay 1
1936 Power-Transfer Relay for Crossing Signals   3.5 MB
DN-26 relay 1
1950 Retained-Neutral Neutral Relay   3.4 MB
DNL-41 relay 1
1935 An Under-Voltage Relay   1.2 MB
DNL-46 relay 1
1937 New Devices- March 1937   18.1 MB
Dock Jct., PA 3
1955 New York Central’s CTC – It’s Four Tracks to Two   4.1 MB
1955 News briefs. 1955-08   830.4 KB
1957 Where Two Tracks Do the Work of Four   3.2 MB
Doctortown, GA 1
1955 News briefs. 1955-08   830.4 KB
Dodson, MO 1
1924 Controlled Manual Block Signaling With Train Control   5.5 MB
Dodson, MT 4
1960 News briefs. 1960-01   1.1 MB
1960 News briefs. 1960-03   1.9 MB
1960 News briefs. 1960-06   1.2 MB
1960 News briefs. 1960-07   845.4 KB
dog charts 1
1916 Method for Checking Mechanical Locking   322.8 KB
Dolton, IL 2
1925 Division Train Control Installation on C&EI Approved by ICC   2.9 MB
1920 Largest Saxby & Farmer Machine in the United States   1.6 MB
domino system 1
1962 Control Panels   243.4 KB
Doran, MN 1
1957 GN CTC's 175 miles of mainline   635.9 KB
dot matrix 1
1964 Train Describers: A step toward ATI   2.1 MB
Dothan, TX 1
1960 T&P moves CTC machine 78 miles   423.0 KB
Dotsero, CO 4
1943 CTC on 107 Miles of Single-Track on the Rio Grande   9.7 MB
1955 One CTC Machine Replaces Three   451.9 KB
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
double filament lamps 1
1937 New Devices- March 1937   18.1 MB
Douglas Park Line, Chicago, IL 1
1956 Automatic Crossing Gates on CTA Are Interconnected with Street Traffic Lights   5.1 MB
Dove, IA 1
1951 Single Track with CTC Replaces Double Track on Milwaukee   586.0 KB
Dover, NH 2
1965 News briefs. 1965-10   1.1 MB
1965 News briefs. 1965-11   1.2 MB
Dover, NJ 1
1931 The Signaling of the Lackawanna Electrified Territory   5.9 MB
Downers Grove, IL 3
1925 Excellent Results for 35 Years on Burlington   1.5 MB
1931 New Control System Used at Electric Interlocking on the Burlington   3.5 MB
1954 New Wayside and Cab Signaling   753.2 KB
downstream adjacent crossing 1
1965 GCPs can be used for various types of grade crossings   374.6 KB
Doyle, KY 1
1947 CTC Down by the Ohio   2.7 MB
Doylestown, PA 1
1963 News briefs. 1963-12   429.2 KB
DP-14 relay 1
1940 Plug Couplers for Relays and Signals   1.3 MB
DP-20 relay 1
1950 Retained-Neutral Neutral Relay   3.4 MB
DP-21 relay 1
1950 Retained-Neutral Neutral Relay   3.4 MB
Dr. William Churchill 1
1949 A Century of Signal Glass Developments   4.2 MB
Dr. William Robinson 1
1943 Progress in the Use of Coded Track Circuits   1.6 MB
drafting 5
1940 Drafting Boards   1.8 MB
1916 Method for Checking Mechanical Locking   322.8 KB
1937 Prepare for Construction   1.2 MB
1909 Willson's Gummed Paper Letters and Figures   170.0 KB
1909 Willson's Gummed Paper Letters and Figures   598.7 KB
drafting room 2
1910 Drafting Room Practice in the Signal Department   1.3 MB
1910 Supplemental Notes on Drafting Practice   382.8 KB
dragging equipment deectors 1
1960 News briefs. 1960-10   1.8 MB
dragging equipment detections 1
1964 News briefs. 1964-10   768.6 KB
dragging equipment detector 2
1961 Railroad Will Pay For CTC Out Of Accrued Savings   842.9 KB
1947 Southern Pacific Installs CTC   990.2 KB
dragging equipment detectors 13
1965 AAR and RLEA reply to RS&I exceptions   863.6 KB
1950 Audible Warning Sounded When Dragging Equipment Detectors Operate   4.2 MB
1957 CTC on the SP has special devices   518.8 KB
1939 Drag Detectors Protect Bridges   3.2 MB
1959 Fewer wayside observers makes automatic hazard detection necessary   1.1 MB
1960 News briefs. 1960-11   875.5 KB
1963 News briefs. 1963-12   429.2 KB
1964 News briefs. 1964-07   833.0 KB
1965 News briefs. 1965-06   1.2 MB
1958 RS&C 50th anniversary: Railroad communications ... from Morse to microwave   3.3 MB
1949 Signal Indications to Stop Trains When Dragging Equipment Detectors Operate   922.0 KB
1958 Signaling to cut expenses in '58   411.4 KB
1939 Special Aspects for Detectors   937.0 KB
drawbridge 4
1935 Accident at Drawbridge   1.4 MB
1939 Electric Interlocking on the New Haven   2.1 MB
1941 Southern Pacific Installs Interlocking at Drawbridge   6.3 MB
1929 Trap Circuit for Drawbridge   980.8 KB
drawbridge interlocking 1
1947 Drawbridge Interlocking on the Elgin, Joliet & Eastern   647.3 KB
drawbridges 1
1939 Drag Detectors Protect Bridges   3.2 MB
Drayton Hall, SC 1
1964 News briefs. 1964-05   1.0 MB
Driftwood, PA 1
1937 Ends of Double Track Controlled by CTC   12.4 MB
drill signals 1
1957 Consolidation cuts costs   1.1 MB
Dryden, G. H. 4
1946 G. H Dryden retires   455.7 KB
1911 Letters to the Editor: A Difference of Opinion   739.6 KB
1928 Personal Mention: G. H. Dryden   432.7 KB
1927 The Color Position Light Signal (poem)   435.2 KB
Du Quoin, IL 5
1961 News briefs. 1961-12   978.0 KB
1962 News briefs. 1962-06   989.1 KB
1962 News briefs. 1962-07   494.2 KB
1963 News briefs. 1963-03   790.6 KB
1965 News briefs. 1965-01   2.0 MB
dual control switches 1
1960 Fourteen RRs adopt new operating code   945.4 KB
dual-control 2
1956 Switch Machines for CTC   2.0 MB
1956 Switch Machines for CTC   985.3 KB
Dublin, VA 1
1950 Neon Lighting For Crossing Gate Arms   3.1 MB
Dubuque, IA 4
1942 Automatic Signal Program on the Illinois Central   4.6 MB
1911 Automatic Signals on the Chicago Great Western   7.4 MB
1965 Midwest RRs fight the weather   914.4 KB
1936 Signals Installed at 26 Crossings in Dubuque, IA   13.8 MB
Duck Creek, WI 1
1929 C&NW Employs Centralized Control To Speed Up Trains   3.0 MB
Duluth, Missabe & Iron Range 7
1964 Cars identified automatically   512.0 KB
1944 CTC Speeds Ore Traffic On the DM&IR   4.6 MB
1962 DM&IR Consolidates CTC Control Miles   384.7 KB
1954 New Interlocking on Leads to Docks Saves Time for Ore Trains   2.9 MB
1961 News briefs. 1961-10   1.0 MB
1959 Pushbutton console for CTC   785.3 KB
1961 Survey Tells How Railroads Use Hotbox Detectors   1.8 MB
Duluth, MN 5
1964 Cars identified automatically   512.0 KB
1944 CTC Speeds Ore Traffic On the DM&IR   4.6 MB
1962 DM&IR Consolidates CTC Control Miles   384.7 KB
1915 Duluth Terminal Trestle Signaling   2.3 MB
1954 New Interlocking on Leads to Docks Saves Time for Ore Trains   2.9 MB
Duluth, South Shore & Atlantic 2
1960 Fourteen RRs adopt new operating code   945.4 KB
1960 What’s the answer? Automatic OS   354.1 KB
Dumas Jct., TX 1
1963 News briefs. 1963-01   951.3 KB
Dunbridge, OH 2
1965 News briefs. 1965-01   2.0 MB
1965 News briefs. 1965-06   1.2 MB
Duncannon, PA 1
1963 News briefs. 1963-01   951.3 KB
Dundas, OH 1
1962 News briefs. 1962-11   468.1 KB
Dundee, VA 1
1962 News briefs. 1962-10   461.7 KB
Dunfee, IN 1
1928 Early APB Signaling   408.5 KB
Dunkirk, NY 1
1955 News briefs. 1955-08   830.4 KB
Dunkirk, OH 3
1964 News briefs. 1964-10   768.6 KB
1965 News briefs. 1965-01   2.0 MB
1965 News briefs. 1965-06   1.2 MB
Dunmore, Alberta 1
1947 Canadian Pacific Installs Absolute Permissive Block   774.8 KB
Dunn, John H. 3
1958 RS&C 50th anniversary: Foreword   502.5 KB
1958 RS&C 50th anniversary: Looking ahead   652.9 KB
1958 Six editors in 50 years   253.5 KB
Dunsmuir, CA 1
1944 Railroad Applications of Electronics   1.9 MB
Duplainville, WI 1
1960 What's the answer? Snow shields   424.6 KB
Dupo, IL 1
1955 Crossing gate protection with indicators for train movements   432.4 KB
Durand, MI 2
1953 Grand Trunk Installs CTC on 37 Miles of Busy Single Track   3.5 MB
1958 One track does work of two   521.4 KB
Durango, IA 1
1911 Automatic Signals on the Chicago Great Western   7.4 MB
Durham, IN 1
1960 News briefs. 1960-09   756.9 KB
Durham, NC 1
1950 Neon Lighting For Crossing Gate Arms   3.1 MB
dust storms 1
1935 Signaling in Dust Storms   2.3 MB
Dutton, George B. Jr. 1
1950 Approach Distances and Times   5.5 MB
dwarf signals 5
1937 Approach Locking on Dwarf Signals   1.2 MB
1951 Burlington Installs Extensive Interlocking at Kansas City   1.0 MB
1947 How Low Is a Dwarf?   438.7 KB
1937 Phantom Indications of Dwarfs   1.3 MB
1960 What's the answer? Dwarf signals   511.5 KB
Dwight, IL 1
1934 Simplified Interlocking Speeds Train Operation   1.9 MB
dynamic braking 1
1965 Transit vehicles set for automatic running   182.7 KB
dynamic indication 2
1961 Dynamic Indication   254.1 KB
1962 Dynamic Indication   211.7 KB

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