Railway Signaling: S

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"S" indicators 1
1951 Power Switches and Spring Swiches in CTC on the Frisco   1.2 MB
"S" marker 1
1951 Double to Single Track 60 Miles on the Erie   1.1 MB
"S" markers 5
1943 Centralized Traffic Control Installed On 64.6 Miles of the Seaboard   7.1 MB
1944 CTC On 185 Miles on Canadian National   12.3 MB
1944 CTC Speeds Ore Traffic On the DM&IR   4.6 MB
1940 Entering the Main Line   1.3 MB
1944 Signals Direct Trains at Junction On the Denver & Rio Grande Western and the Denver & Salt Lake   2.8 MB
"SH" interlocking, Madison, IL 1
1955 Crossing gate protection with indicators for train movements   432.4 KB
"SW" Tower, WV 1
1965 B&O would have used radio orders   573.9 KB
's Hertogenbosch 1
1951 New Interlocking in Holland   1.0 MB
SA-1 1
1961 Type SA-1 Searchlight Signal   193.7 KB
Sabula, IA 1
1927 Comparative Maintenance Costs of Signaling on the CM&StP   2.9 MB
Sacramento Northern 3
1939 Cab Signaling and Train Control On the San Francisco-Oakland Bay Bridge   7.2 MB
1939 San Francisco-Oakland Bay Bridge Interlocking Plants   9.4 MB
1939 San Francisco-Oakland Bay Bridge Signaling and Interlocking   7.9 MB
Sacramento, CA 3
1962 Automatic Dispatching   2.1 MB
1962 News Briefs. 1962-02   1.4 MB
1964 News Briefs. 1964-04   1.4 MB
Saginaw, MI 4
1958 C&O Has Good Ideas in CTC   2.5 MB
1955 CTC Saves Time for Freights On 135 Miles of Single Track   4.0 MB
1965 News Briefs. 1965-01   2.0 MB
1965 News Briefs. 1965-10   1.1 MB
Salamanca, NY 1
1929 Erie Equips Complete Division with Signals and Interlockers   3.9 MB
Salem, IL 1
1962 News Briefs. 1962-06   980.1 KB
Salem, VA 1
1950 Neon Lighting For Crossing Gate Arms   3.1 MB
Salida, CO 1
1961 News Briefs. 1961-04   1.5 MB
Salina, KS 1
1935 Safety of High Speed Trains   5.2 MB
Salinas, CA 1
1962 News Briefs. 1962-09   835.6 KB
Salisbury, MO 1
1955 News Briefs. 1955-08   801.6 KB
Salisbury, NC 2
1965 News Briefs. 1965-08   753.7 KB
1966 News Briefs. 1966-01   1.4 MB
Salkehatchie, SC 1
1964 News Briefs. 1964-05   1.0 MB
Sallisaw, OK 1
1961 News Briefs. 1961-02   1.4 MB
Salt Lake City, UT 4
1949 625 Miles of CTC in one Stretch   7.9 MB
1937 CTC On the Denver & Rio Grande Western   8.0 MB
1954 Electric Interlocking on the Rio Grande   3.4 MB
1943 Union Pacific Installs CTC on 175 Miles of Single Track   13.2 MB
San Antonio, TX 4
1962 Centralization – Dispatch Circuits Are Changing   1.3 MB
1954 CTC Improves Train Operation   3.3 MB
1965 GCPs can be used for various types of grade crossings   374.6 KB
1948 New Signaling In Texas on Missouri Pacific Lines   1.8 MB
San Bernardino, CA 1
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
San Diego, CA 2
1947 ICC Holds Signal Hearing   507.5 KB
1944 Santa Fe Installs CTC on 115.6 Miles Los Angeles to San Diego   7.2 MB
San Francisco Bay Area Rapid Transit 2
1965 AFO circuits can be used in subways   682.4 KB
1965 Japan, Sweden, England test ATO   6.3 MB
San Francisco, CA 11
1965 AFO circuits can be used in subways   682.4 KB
1939 Cab Signaling and Train Control On the San Francisco-Oakland Bay Bridge   7.2 MB
1940 Determination of Block Lengths on the San Francisco-Oakland Bay Bridge   4.0 MB
1915 Electro-Pneumatic Plant at San Francisco   2.4 MB
1947 ICC Holds Signal Hearing   507.5 KB
1937 Illumination as a Type of Crossing Protection   3.0 MB
1964 News Briefs. 1964-04   1.4 MB
1935 Safety of High Speed Trains   5.2 MB
1964 San Francisco will test four ATO systems   1.4 MB
1939 San Francisco-Oakland Bay Bridge Interlocking Plants   9.4 MB
1939 San Francisco-Oakland Bay Bridge Signaling and Interlocking   7.9 MB
San Francisco-Oakland Bay Bridge 4
1939 Cab Signaling and Train Control On the San Francisco-Oakland Bay Bridge   7.2 MB
1940 Determination of Block Lengths on the San Francisco-Oakland Bay Bridge   4.0 MB
1939 San Francisco-Oakland Bay Bridge Interlocking Plants   9.4 MB
1939 San Francisco-Oakland Bay Bridge Signaling and Interlocking   7.9 MB
San Jose, CA 3
1935 Depression Operation of Interlocking   2.6 MB
1962 Remote Control Interlocking Has Time Division Multiplex System   855.3 KB
1939 Trains Directed by Signal Indication at San Jose, California   4.1 MB
San Marcos, TX 1
1949 New Automatic Block on the Katy   4.7 MB
Sandpoint, ID 2
1963 News Briefs. 1963-03   830.1 KB
1965 News Briefs. 1965-01   2.0 MB
Sandusky, OH 2
1946 Drawbridge Interlocking on the New York Central   3.1 MB
1965 News Briefs. 1965-01   2.0 MB
Santa Ana, CA 1
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
Santa Clara, CA 1
1962 Remote Control Interlocking Has Time Division Multiplex System   855.3 KB
Santa Fe Jct., Kansas City, MO 1
1956 New Three-Track Interchange Includes Interlocking and Talk-Backs   8.9 MB
Santa Fe Street, Kansas City, MO 1
1949 Entrance-Exit Interlocking Installed on Missouri Pacific   3.0 MB
Sapulpa, OK 1
1929 Frisco Installs Semaphores with Color-Light Indication   665.1 KB
Saratoga Springs, NY 1
1955 News Briefs. 1955-08   801.6 KB
Saskatoon, Saskatchewan 2
1962 News Briefs. 1962-07   509.0 KB
1964 News Briefs. 1964-01   555.4 KB
Savanna, GA 1
1955 News Briefs. 1955-08   801.6 KB
Savanna, IL 5
1943 Centralized Traffic Control Installed on 39 Miles of the Burlington   6.1 MB
1927 Comparative Maintenance Costs of Signaling on the CM&StP   2.9 MB
1964 Milwaukee installs its first microwave   281.6 KB
1947 More CTC on the Burlington   2.0 MB
1963 News Briefs. 1963-01   971.6 KB
Savannah, GA 4
1947 Annual Review and Outlook   425.1 KB
1943 Centralized Traffic Control Installed On 64.6 Miles of the Seaboard   7.1 MB
1926 Signal Business Is Good Especially For Single Track   382.3 KB
1944 Track Circuits on Passing Tracks in CTC Territory   941.8 KB
Sawmills, Rhodesia 1
1965 Rhodesia has 1215 miles of CTC   949.2 KB
Sawmills, Zimbabwe 1
1965 Rhodesia has 1215 miles of CTC   949.2 KB
Saxby & Farmer 4
1915 Electric Train Staff Installation   3.3 MB
1920 Largest Saxby & Farmer Machine in the United States   1.6 MB
1951 Pennsylvania Exhibits Speed Control   512.5 KB
1936 T. George Stiles Rounds Out 60 Years of Signaling   2.5 MB
Saxby & Farmer machine 1
1910 Electric Interlocking at Griffith, Indiana   964.1 KB
Sayre, PA 2
1962 News Briefs. 1962-04   1.2 MB
1963 News Briefs. 1963-05   742.2 KB
Scales Mound, IL 1
1942 Automatic Signal Program on the Illinois Central   4.6 MB
scheduling 1
1940 Make-Up-Time Chart   813.1 KB
Schenectady, NY 3
1947 Hoosac Tunnel Interlocking and CTC   1.7 MB
1961 News Briefs. 1961-01   755.2 KB
1961 News Briefs. 1961-07   654.1 KB
Schiller Park, IL 4
1962 News Briefs. 1962-02   1.4 MB
1963 News Briefs. 1963-10   518.0 KB
1965 News Briefs. 1965-10   1.1 MB
1933 Remote Control on Soo Line   2.7 MB
Schreiber, Ontario 1
1944 Canadian Pacific Installs Automatic Block Signaling   6.8 MB
Schuylkill River drawbridge, Philadelphia, PA 1
1961 Railroad Will Pay For CTC Out Of Accrued Savings   842.9 KB
Schwendt, B. J. 6
1951 "Central" Increases Safety at Highway Crossings in Dayton   1.0 MB
1926 B. J Schwendt   438.9 KB
1937 Changes on the New York Central Lines   2.3 MB
1927 NYC First to Install Complete Train Dispatching System   8.0 MB
1950 Obituary: B. J. Schwendt   966.4 KB
1941 Simplified Signaling   426.9 KB
Scotia West, NY 1
1955 CTC reduces operating expenses   431.8 KB
Scotland 1
1915 Rule 55 and the Gretna Accident   1.8 MB
Scott Street, Toronto, Ontario 1
1931 Interlocking System Installed at Toronto Union Station   4.6 MB
Scranton, PA 3
1961 News Briefs. 1961-07   654.1 KB
1964 News Briefs. 1964-09   899.1 KB
1965 News Briefs. 1965-02   1.9 MB
Scribner, WA 1
1947 Signals and Slide Fences on the Spokane, Portland & Seattle   1.8 MB
Seaboard Air Line 37
1947 Annual Review and Outlook   425.1 KB
1928 Automatic Signals Within Yard Limits   1.0 MB
1950 Big NX Interlocking at Atlanta   6.3 MB
1943 Centralized Traffic Control Installed On 64.6 Miles of the Seaboard   7.1 MB
1938 Clearing of Signals at Automatic Interlockings   2.2 MB
1950 CTC Indication Code   1.2 MB
1954 CTC into Service   2.5 MB
1962 Hotbox Detectors Talk   2.0 MB
1956 How to Get Maximum Capacity of Single Track   10.5 MB
1935 Installation of Bond Wires   4.0 MB
1937 Location of Signals at Spring Switches   1.3 MB
1929 Marker Lights on Automatic Signals   994.2 KB
1955 Much is new in signaling for 1955   826.7 KB
1921 New Interlockings at Jacksonville Terminal   3.4 MB
1961 News Briefs. 1961-04   1.5 MB
1962 News Briefs. 1962-03   1.1 MB
1962 News Briefs. 1962-04   1.2 MB
1962 News Briefs. 1962-09   835.6 KB
1963 News Briefs. 1963-11   1.4 MB
1964 News Briefs. 1964-08   827.3 KB
1964 News Briefs. 1964-11   791.4 KB
1965 News Briefs. 1965-10   1.1 MB
1935 Night Check of Signal Lights   1.2 MB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
1929 Rear-End Flagging   745.4 KB
1935 Remote Control on the Seaboard   5.4 MB
1935 Removal of Switch Indicators   2.3 MB
1937 Seaboard Utilizes Spring Switches   8.4 MB
1926 Semaphore or Light Signals?   711.2 KB
1928 Signal and Train Control Hearing Ends   2.0 MB
1926 Signal Business Is Good Especially For Single Track   382.3 KB
1951 Signal Modernization Program on the RF&P   1.0 MB
1927 Signaling Special Layouts   4.1 MB
1961 Survey Tells How Railroads Use Hotbox Detectors   1.8 MB
1932 Take-Siding Signals   318.1 KB
1944 Track Circuits on Passing Tracks in CTC Territory   941.8 KB
1928 Why Markers for Automatic Signals?   494.6 KB
searchlght signals 1
1964 News Briefs. 1964-07   849.5 KB
searchlight dwarf signal 1
1955 News Briefs. 1955-08   801.6 KB
searchlight signal 1
1961 Type SA-1 Searchlight Signal   193.7 KB
searchlight signals 52
1921 A New Light Signal   1.4 MB
1956 Aligning Searchlight Signal   1.1 MB
1934 An Electric Interlocking on the Southern Pacific   1.8 MB
1947 Automatic Block With Spring Switches installed on the Georgia Railroad   851.4 KB
1951 Automatic Block Without Line Wires on the Kansas City Southern   723.0 KB
1935 Avoiding Light-Out Signal Failures   1.2 MB
1939 Burlington Replaces Semaphores With Color Lights   3.4 MB
1947 Canadian Pacific Installs Absolute Permissive Block   774.8 KB
1944 Canadian Pacific Installs Automatic Block Signaling   6.8 MB
1943 Centralized Traffic Control Installed on 39 Miles of the Burlington   6.1 MB
1943 Centralized Traffic Control on the Milwaukee   2.8 MB
1949 Coast Line Replaces Signaling On Engine District   8.1 MB
1947 CTC Down by the Ohio   2.7 MB
1955 CTC enables P&LE to remove fourth main track   515.3 KB
1947 CTC Has Long Sidings With Signals on the Santa Fe   2.1 MB
1954 CTC Improves Train Operation   3.3 MB
1950 CTC Installed on 128 Miles of NKP   12.1 MB
1951 CTC on Single Track Permits Removal of Second Main on 22.4 Miles on Boston & Maine   924.4 KB
1943 CTC on the Bessemer & Lake Erie   8.7 MB
1937 CTC On the Denver & Rio Grande Western   8.0 MB
1947 Drawbridge Interlocking on the Elgin, Joliet & Eastern   647.3 KB
1947 Hoosac Tunnel Interlocking and CTC   1.7 MB
1939 Improved Searchlight Signal   3.3 MB
1936 Interlocking and Remote Control on Erie   18.9 MB
1947 Large All-Relay Interlocking on the New York Central   2.5 MB
1944 Light-Type Signals Installed on the Reading   6.3 MB
1954 Loudspeakers and Interlocking Improve Yard Operation   4.7 MB
1947 Milwaukee Installs Block System on 98 Miles   1.2 MB
1947 Modern Interlocking Applied to Ore Transportation   1.1 MB
1943 Modernization of Automatic Signaling On the New York Central   9.8 MB
1935 Multiple Aspect Signaling   3.3 MB
1944 New All-Relay Interlocking at Providence, RI on the New Haven   5.8 MB
1949 New Automatic Block on the Katy   4.7 MB
1951 New Interlocking in Holland   1.0 MB
1940 New Searchlight Signal   2.7 MB
1935 New Signaling on the Route of the C&NW "400"   9.6 MB
1940 New Signaling on the Wabash   8.1 MB
1944 New York Central Installs Coded Track Circuits   3.9 MB
1964 News Briefs. 1964-06   820.5 KB
1954 NYC Combines Interlockings   2.4 MB
1951 P&LE Rebuilds Interlocking   957.2 KB
1939 Plug Connector for "H-2" Searchlight Signals   1.1 MB
1951 Power Switches and Spring Swiches in CTC on the Frisco   1.2 MB
1935 Repeating Reverse Signal Indication   2.9 MB
1955 Santa Fe installs CTC on single track   610.2 KB
1937 Signal Construction on the Wabash   12.2 MB
1947 Signaling and Interlocking in Italy   684.8 KB
1944 Signaling Modernized On the Pittsburgh & Lake Erie   4.7 MB
1937 Signaling on the Wabash   3.7 MB
1947 Southern Pacific Installs CTC   990.2 KB
1954 SP Modernizes Automatic Block   2.0 MB
1947 The New Haven Installs All-Relay Interlocking at Providence, RI   1.9 MB
Searcy, AL 1
1965 News Briefs. 1965-05   1.4 MB
Seattle monorail 1
1962 News Briefs. 1962-03   1.1 MB
Seattle, WA 6
1963 GN Radio Works in Tunnel   1.1 MB
1962 News Briefs. 1962-03   1.1 MB
1964 News Briefs. 1964-04   1.4 MB
1964 News Briefs. 1964-10   778.4 KB
1965 News Briefs. 1965-09   379.4 KB
1920 The New Electrification on the St. Paul   485.4 KB
Secaucus, NJ 1
1931 The Signaling of the Lackawanna Electrified Territory   5.9 MB
Sedalia, MO 1
1964 News Briefs. 1964-06   820.5 KB
Sedley, IN 1
1934 CTC Replaces Staff on GTW   2.6 MB
Seifert, IN 1
1948 CTC Keeps ‘em Rollin’ on C&EI   2.1 MB
Selbytown, IL 1
1911 Signaling on the Illinois Traction System   1.5 MB
Seligman, AZ 2
1961 News Briefs. 1961-06   718.3 KB
1961 Santa Fe Signals New Main Line   913.2 KB
Selinsgrove, PA 1
1924 Results of Train Control Test on Pennsylvania   3.1 MB
Selkirk, NY 3
1927 Color Light Automatic Block Signals Installed on the New York Central   3.6 MB
1962 News Briefs. 1962-08   685.4 KB
1965 News Briefs. 1965-02   1.9 MB
Selma, NC 1
1961 News Briefs. 1961-04   1.5 MB
semaphor signals 1
1962 News Briefs. 1962-07   509.0 KB
semaphore controller 1
1940 Controller Adjuster   1.3 MB
semaphore mechanisms 1
1911 Summary of Recent Progress in Signaling   4.4 MB
semaphore signals 42
1935 "Chattering" Slot Arms   2.3 MB
1939 A Message of Confidence   741.8 KB
1947 Annual Review and Outlook   425.1 KB
1936 Approach Electric Lighting On the Erie   2.7 MB
1911 Automatic Signals on the Chicago Great Western   7.4 MB
1936 Back Locks on Approach Signals   1.4 MB
1917 Block Signals on the Monon   675.3 KB
1915 British and American Railroad Signaling   3.6 MB
1939 Burlington Replaces Semaphores With Color Lights   3.4 MB
1937 Color Light Signals Replace Semaphores on Union Pacific   4.2 MB
1936 Electric Lighting of Semaphores   867.6 KB
1939 Electric Lights for Semaphores   1.9 MB
1936 Electric Lights for Semaphores and Train Approach Indicators on the Rock Island   8.9 MB
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
1909 Gold Leaf for Signal Blades   351.9 KB
1940 New Searchlight Signal   2.7 MB
1962 News Briefs. 1962-02   1.4 MB
1963 News Briefs. 1963-10   518.0 KB
1964 News Briefs. 1964-07   849.5 KB
1965 News Briefs. 1965-08   753.7 KB
1935 Night Check of Signal Lights   1.2 MB
1951 On the Baltimore & Ohio New Interlocking Speeds Trains   641.0 KB
1955 Pennsylvania installs wayside equipment for cab signaling   745.7 KB
1951 Power Switches and Spring Swiches in CTC on the Frisco   1.2 MB
1921 Progress of Railroad Signaling in America   731.8 KB
1943 Railway Signaling in North Africa   3.5 MB
1915 Red as a Danger Indication   283.5 KB
1935 Repeating Reverse Signal Indication   2.9 MB
1913 Settled at Last   824.8 KB
1922 Signal Construction on the Santa Fe   797.6 KB
1947 Signaling and Interlocking in Italy   684.8 KB
1911 Signaling on the Illinois Traction System   1.5 MB
1935 Snubbing Rectifier for 2A Signal   1.9 MB
1935 Snubbing Relay for Semaphores   1.0 MB
1909 Solenoid Signals   2.1 MB
1912 The Automatic Signal and the Local Circuit   1.9 MB
1936 The Delaware, Lackawanna & Western's Approach-Lighting System for Semaphore Signals   3.4 MB
1924 Three-Indication Distant Signals on Alsace-Lorraine Railways   2.7 MB
1916 TRAIN signs on the Santa Fe   258.0 KB
1915 Victoria Jubilee Bridge Protection   570.0 KB
semi-automatic interlocking 3
1935 Semi-Automatic Interlocking at a Crossing on the Alton   4.4 MB
1937 Semi-Automatic Interlockings on the Boston Elevated   3.8 MB
1951 Street and Railroad Crossing Protection Combined   529.9 KB
semi-automatic signaling 1
1919 Block Signaling Practice on a British Railway (Part 3)   337.3 KB
seniority districts 1
1965 Signalmen's President Jesse Clark discusses safety on the railroads   643.5 KB
sequence switch interlocking 1
1953 Route Lever Interlocking on Rock Island   6.5 MB
Servo 1
1962 Hotbox Detectors Talk   2.0 MB
Seventeenth Street, Chicago, IL 1
1944 Automatic Signaling, Train Stop, and Route Interlocking Installed in the Chicago Subways   8.6 MB
Shaker Heights Transit 1
1955 New Cleveland Transit System   911.5 KB
Shamokin, PA 1
1936 Reading Installs Unique Crossing Protection   9.5 MB
Sharon Yard, Cincinnati, OH 1
1964 News Briefs. 1964-08   827.3 KB
Sharon, OH 1
1942 Chicago's Newest Subway Has Automatic Block Signaling and Train Stop   457.5 KB
Sharon, WI 1
1913 New Block Signaling on the North-Western   1.8 MB
Sharonville, OH 1
1965 News Briefs. 1965-01   2.0 MB
Sharpes, FL 1
1964 News Briefs. 1964-08   827.3 KB
Sheets, R. A. 1
1937 Personal: C&NW   1.3 MB
Shelby, MT 1
1963 News Briefs. 1963-06   973.6 KB
Sheldon, IL 1
1962 News Briefs. 1962-10   457.3 KB
shelf relay 1
1910 The Hall Signal Company’s New Relay   1.4 MB
Shenandoah, VA 1
1926 Train Control Progress in 1925   3.1 MB
Sheridan, WI 1
1963 News Briefs. 1963-10   518.0 KB
Sherman Hill, WY 1
1955 CTC and cab signaling on Union Pacific   789.5 KB
Sherman, FL 1
1963 News Briefs. 1963-11   1.4 MB
Sherman, WY 1
1955 CTC and cab signaling on Union Pacific   789.5 KB
Sherwood, OH 1
1965 News Briefs. 1965-06   1.2 MB
Shippensburg, PA 1
1950 CTC on the Reading   6.6 MB
shipping case 1
1911 Relay Shipping Case   1.1 MB
Shirley, CA 1
1922 Signal Construction on the Santa Fe   797.6 KB
Shirley, IN 1
1962 News Briefs. 1962-02   1.4 MB
Shopton, IA 3
1962 News Briefs. 1962-02   1.4 MB
1963 News Briefs. 1963-01   971.6 KB
1926 Train Control Progress in 1925   3.1 MB
Shore Line Jct., CT 1
1956 New Haven Consolidates Control of Nine Interlocking Layouts   8.3 MB
Shoreham Yard, Minneapolis, MN 1
1962 News Briefs. 1962-02   1.4 MB
show sheds 1
1935 Electric Interlocking in Snow Sheds on the Southern Pacific   8.2 MB
Shreveport, LA 2
1965 News Briefs. 1965-12   618.4 KB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
sidings 2
1956 Main Track Leaving Signal   2.2 MB
1961 Should Sidings Have Circuits?   347.6 KB
Sidney, IL 1
1941 Automatics Installed on the Wabash   4.0 MB
Siemens & General Electric (Signals) 1
1965 Rhodesia has 1215 miles of CTC   949.2 KB
Sierra Blanca, TX 1
1962 Centralization – Dispatch Circuits Are Changing   1.3 MB
Sierra Nevada mountains 1
1935 Electric Interlocking in Snow Sheds on the Southern Pacific   8.2 MB
Signal Accessories Corporation 1
1928 Saco Lever Circuit Controller   735.1 KB
signal applications 1
1954 Fewer ICC Signal Applications   1.7 MB
signal aspects 24
1949 A Century of Signal Glass Developments   4.2 MB
1943 A Review of 1942   2.9 MB
1939 Cab Signaling and Train Control On the San Francisco-Oakland Bay Bridge   7.2 MB
1936 Double-Caution Signaling   3.4 MB
1935 Flashing Aspects   1.3 MB
1950 High Speed Turnout Signaling   2.3 MB
1943 Instructions in Signal Aspects and Indications to New Employees   5.6 MB
1939 Intermediate Signals and Approach Aspects   2.3 MB
1950 Lunar White   419.3 KB
1935 Modern Signal Aspects on the Boston & Maine   5.1 MB
1935 Multiple Aspect Signaling   3.3 MB
1935 Multiple-Block Signaling   7.0 MB
1939 Problems of Four-Indication Signaling   1.6 MB
1943 Progress in the Use of Coded Track Circuits   1.6 MB
1935 Purple Signal Glasses   3.6 MB
1935 Purple Signal Glasses   3.3 MB
1911 Railway Signal Association Convention: Committee I: Signaling Practice   3.8 MB
1950 Signaling and Rules   1.4 MB
1939 Special Aspects for Detectors   937.0 KB
1939 The Problem of Medium Speed   835.3 KB
1939 Track Turnouts and Signal Aspects   1.8 MB
1949 Train Operation By Signal Inidication Used Extensively on the Nickel Plate   6.1 MB
1935 Use of Marker Lamps   1.0 MB
1949 Varied Light Intensity   921.0 KB
signal aspects and indications 1
1963 Signal changes make transit run on railroad   1.1 MB
signal blueprints 1
1936 Maintainers' Blueprint Plans   4.2 MB
signal cable 1
1961 Single Cable System Proposed for Signal and Communications Circuits   808.3 KB
signal colors 6
1949 A Century of Signal Glass Developments   4.2 MB
1935 Multiple Aspect Signaling   3.3 MB
1935 Purple Signal Glasses   3.6 MB
1935 Purple Signal Glasses   3.3 MB
1915 Red as a Danger Indication   283.5 KB
1937 Selection of Colors for Signal Lights   1.3 MB
signal construction 3
1951 More Signal Construction in 1950   1.0 MB
1937 Prepare for Construction   1.2 MB
1937 Signaling Construction Methods   2.6 MB
signal construction outlook 1
1962 1962 outlook   3.0 MB
signal failure reporting 1
1908 Reporting System of the Illinois Central Railroad   1.3 MB
signal failures 4
1950 Continued Improvement In Signal Performance   1.3 MB
1946 Improved Signal Performance   446.8 KB
1908 Reporting System of the Illinois Central Railroad   1.3 MB
1965 Signal failures reported by ICC   1.1 MB
signal flags 1
1937 Flag and Torpedo Containers   903.1 KB
signal glass 4
1949 A Century of Signal Glass Developments   4.2 MB
1929 Factors to be Considered in Selecting Glass for Signal Lenses   4.2 MB
1915 Glass Standardization for Railway Signaling   1.0 MB
1915 Red as a Danger Indication   283.5 KB
signal indications 10
1939 Action at Approach Signal   964.5 KB
1935 Collision on the T&P   2.0 MB
1936 Demands for Modern Signaling   12.1 MB
1936 Double-Caution Signaling   3.4 MB
1943 Instructions in Signal Aspects and Indications to New Employees   5.6 MB
1911 Letters to the Editor: Uniform Signaling: A reply to Mr. Rudd   1.8 MB
1911 Railway Signal Association Convention: Committee I: Signaling Practice   3.8 MB
1950 Signaling and Rules   1.4 MB
1911 Signaling Practice on Steam Railways   5.5 MB
1940 Single-Track Signaling   2.5 MB
signal inspection law 1
1937 Signal Inspection Bill Passed by Congress   3.4 MB
signal inspections 2
1911 Results of Inspections Made by the Block Signal and Train Control Board   2.8 MB
1939 The Signaling Regulations   907.9 KB
signal instruction 1
1937 Instructing Enginemen on Signal Indications   2.7 MB
signal lamps 6
1935 Checking Signal Lamps   3.3 MB
1935 Night Intensity of Signal Lamps   2.6 MB
1937 Replacement and Life of Lamps   3.0 MB
1956 Signal Lamp Test   1.4 MB
1956 Signal Lamp Test   950.0 KB
1947 Smaller Signal Lamps   295.9 KB
signal lenses 1
1949 A Century of Signal Glass Developments   4.2 MB
signal lighting 4
1937 Electric Signal Lights in Austria   1.2 MB
1935 Night Check of Signal Lights   1.2 MB
1935 Night Intensity of Signal Lamps   2.1 MB
1965 What's the Answer? 1965-06   235.3 KB
signal maintainers 2
1937 Broken Rails   1.1 MB
1935 Maintainers' Tool Houses   2.2 MB
signal mechanisms 1
1935 Obsolescence in Signaling   3.4 MB
signal nomenclature 1
1921 The Use of a Standard System of Nomenclature   337.6 KB
signal performance 1
1950 Continued Improvement In Signal Performance   1.3 MB
signal projects 1
1956 Photography   1.5 MB
signal repair 1
1939 A Signal Shopping Policy   965.3 KB
Signal Section 1
1940 A Change in the Requisites, Definitions and Regulations   1.2 MB
signal shop 2
1939 A Signal Shopping Policy   965.3 KB
1956 Three Signal Shops into One   7.0 MB
signal spacing 8
1935 A Problem in Spacing Signals for Higher Train Speeds   1.6 MB
1935 Braking Distance with Signals   2.4 MB
1935 Multiple Aspect Signaling   3.3 MB
1935 New Signaling on the Route of the C&NW "400"   9.6 MB
1935 Respacing Automatics on the Pennsylvania   1.8 MB
1935 Safety of High Speed Trains   5.2 MB
1935 Signaling for Higher Train Speeds   3.0 MB
1935 Stopping Distance and Signal Spacing   1.8 MB
signal standards 4
1910 Drafting Room Practice in the Signal Department   1.3 MB
1913 Settled at Last   824.8 KB
1910 Supplemental Notes on Drafting Practice   382.8 KB
1935 The Rudd-Rhea Signaling Report of the Pennsylvania   9.7 MB
signal testing 4
1940 Pennsylvania Testing Procedure   16.6 MB
1940 Pennsylvania Testing Procedure (Part II)   8.6 MB
1940 Pennsylvania Testing Procedure (Part III)   8.9 MB
1965 What's the Answer? 1965-07   629.7 KB
signal training 2
1943 Instructions in Signal Aspects and Indications to New Employees   5.6 MB
1965 Signalmen's President Jesse Clark discusses safety on the railroads   643.5 KB
signal transformers 1
1935 Signal Transformers   2.2 MB
signal trouble 4
1911 An Interesting Case of Trouble   776.2 KB
1937 Unusual Signal Trouble   1.2 MB
1939 Unusual Signal Trouble   835.4 KB
1937 Unusual Signaling Trouble   2.2 MB
signaling 14
1937 Gauntlet Signals on the B&LE   7.1 MB
1933 Modern Signaling in Soviet Russia   3.3 MB
1943 Railway Signaling in North Africa   3.5 MB
1935 Remote Control on the Seaboard   5.4 MB
1935 Signaling at Spring Switches   2.6 MB
1938 Signaling at Spring Switches   930.3 KB
1952 Soo Line Completes Signaling on 260 Miles of Single Track   737.7 KB
1950 Spring Switch Signaling   2.5 MB
1912 The New York, Westchester & Boston Railway (1912-08)   4.1 MB
1912 The New York, Westchester & Boston Railway (1912-10)   4.7 MB
1912 The New York, Westchester & Boston Railway (1912-12)   4.8 MB
1945 The Post-War Importance of Signaling   522.0 KB
1927 The Public Is Interested in Signaling   444.4 KB
1928 Why Markers for Automatic Signals?   494.6 KB
signaling practice 4
1911 A Summary of Signaling Practice   3.6 MB
1911 Railway Signal Association Convention: Committee I: Signaling Practice   3.8 MB
1937 Report of Committee X – Signaling Practice   2.9 MB
1911 Signaling Practice on Steam Railways   5.5 MB
signals 3
1915 British and American Railroad Signaling   3.6 MB
1920 The Use of Signals for Better Train Operation (Part 1 of 2)   5.7 MB
1920 The Use of Signals for Better Train Operation (Part 2 of 2)   7.3 MB
signs 1
1956 CTC Signs   1.8 MB
Silvis, IL 3
1944 Coded Track Circuits for CTC and Cab Signaling   4.0 MB
1944 Rock Island Installs Cab Signaling and Centralized Traffic Control   10.0 MB
1949 Signaling Adapted to Traffic On the Rock Island   5.2 MB
simulation 1
1962 Computer Simulation of CTC   220.3 KB
Sinclair, MT 1
1937 Automatic Plant Replaces Mechanical Interlocking   1.3 MB
Singer, VA 1
1961 News Briefs. 1961-04   1.5 MB
single-track line 1
1936 What Is the Capacity of a Single-Track Line?   2.0 MB
single-tracking 1
1956 Double to Single Track With CTC   7.4 MB
Sinks, KY 2
1947 Annual Review and Outlook   425.1 KB
1946 CTC on 107 Miles of Single Track on the Louisville & Nashville   5.2 MB
Sioux City, IA 1
1964 Milwaukee installs its first microwave   281.6 KB
Sioux Falls, SD 1
1964 Milwaukee installs its first microwave   281.6 KB
Sir Johns Run, WV 1
1944 Remote Control Project Saves Train Time on the Baltimore & Ohio   3.5 MB
Skamania 1
1947 Signals and Slide Fences on the Spokane, Portland & Seattle   1.8 MB
Skokie Jct., IL 1
1926 North Shore Line Installs Two Electric Interlockers   2.1 MB
Slaton, TX 1
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
Sleeper, MO 1
1947 Frisco Moves CTC to One Office   481.1 KB
slide detector fence 2
1962 Automatic Dispatching   2.1 MB
1961 News Briefs. 1961-04   1.5 MB
slide detector fences 3
1947 107 Miles of CTC on the N&W   2.3 MB
1947 Signals and Slide Fences on the Spokane, Portland & Seattle   1.8 MB
1936 Slide Detector Fences   4.3 MB
slot arms 1
1935 "Chattering" Slot Arms   2.3 MB
slow orders 1
1950 Temporary Change of Signal Controls   2.2 MB
SLV-13 AC relays 1
1940 Plug Couplers for Relays and Signals   1.3 MB
Smallwood, Labrador 1
1962 1962 outlook   3.0 MB
snow detectors 1
1961 Snow Detectors   239.5 KB
snow melters 1
1956 Snow Melters   2.6 MB
snubbing rectifier 1
1935 Snubbing Rectifier for 2A Signal   1.9 MB
snubbing relay 1
1935 Snubbing Relay for Semaphores   1.0 MB
Soapstone, MA 1
1947 Hoosac Tunnel Interlocking and CTC   1.7 MB
Social Circle, GA 1
1947 Automatic Block With Spring Switches installed on the Georgia Railroad   851.4 KB
solar angle 1
1939 Phantom Indications in Color-Light Signals   2.2 MB
Soldier Summit, UT 1
1961 News Briefs. 1961-10   1.0 MB
solid state coded control 1
1963 Interlocking: New Solid State Devices Save Money   2.1 MB
solid state coded track circuits 1
1963 Special Report: P&LE Signaling and Communications   3.9 MB
solid state interlocking control 1
1963 Special Report: P&LE Signaling and Communications   3.9 MB
solid state signaling 1
1963 Solid State Devices   938.4 KB
Somerset, KY 1
1924 Three Train Control Contracts Let   1.9 MB
Somerset, MA 1
1916 William Robinson, Inventor of the Track Circuit   373.1 KB
Somerville, MA 1
1951 Glass Library and Museum   319.8 KB
Somerville, TX 1
1922 Signal Construction on the Santa Fe   797.6 KB
Soo Line 18
1949 192 Miles of Automatic Block On Soo Line   6.0 MB
1948 Gates at Three Crossings on Soo Line   1.8 MB
1965 Midwest RRs fight the weather   914.3 KB
1961 News Briefs. 1961-10   1.0 MB
1962 News Briefs. 1962-02   1.4 MB
1962 News Briefs. 1962-07   509.0 KB
1963 News Briefs. 1963-03   830.1 KB
1963 News Briefs. 1963-10   518.0 KB
1964 News Briefs. 1964-02   997.7 KB
1964 News Briefs. 1964-05   1.0 MB
1964 News Briefs. 1964-08   827.3 KB
1965 News Briefs. 1965-05   1.4 MB
1965 News Briefs. 1965-09   379.4 KB
1965 News Briefs. 1965-10   1.1 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
1965 What's the answer? 1965-12   261.7 KB
Sorento, IL 1
1962 News Briefs. 1962-02   1.4 MB
Sorrento, CA 1
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
Soundscriber 1
1948 Car Numbers “Grabbed” by Voice Recorder   783.1 KB
soup 1
1939 Unusual Signal Trouble   835.4 KB
South Acton, MA 1
1935 New Signaling on the Boston & Maine   9.9 MB
South African Railways 1
1963 News Briefs. 1963-04   908.1 KB
South Amboy, NJ 2
1937 New Signaling on Pennsylvania   1.0 MB
1938 Pennsylvania Electrification Signaling   5.3 MB
South Australia 1
1915 Electric Interlockings in Australia   3.9 MB
South Bend, IN 4
1927 Chicago South Shore & South Bend Changes Signal Equipment   2.6 MB
1930 New Electric Interlocking   3.2 MB
1949 New Space Radio Relay System Adopted by South Shore   4.2 MB
1935 New York Central Extends South Bend Interlocking   6.0 MB
South Bend, NE 1
1955 CTC on single and double track   406.8 KB
South Branch Bridge 1
1931 One Electric Interlocking for Two Drawbridges   3.1 MB
South Cheney, WA 1
1947 Signals and Slide Fences on the Spokane, Portland & Seattle   1.8 MB
South Chicago, IL 3
1947 Drawbridge Interlocking on the Elgin, Joliet & Eastern   647.3 KB
1962 EJ&E Uses Tone Coding to Get Systems on One RF Channel   562.3 KB
1956 Length of Train Selects Control of Crossing Gates on Illinois Central   4.6 MB
South Denver, CO 2
1950 Automatic Block Increases Safety on Paired Trackage   4.6 MB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
South Dillon, SC 1
1962 News Briefs. 1962-05   831.1 KB
South Florence, SC 1
1963 News Briefs. 1963-01   971.6 KB
South Gate, CA 1
1930 New Type Rail Crossing Uses Turntable Principle   964.5 KB
South Janesville, WI 1
1913 New Block Signaling on the North-Western   1.8 MB
South Jct., Montreal, Quebec 1
1961 News Briefs. 1961-03   1.0 MB
South Jersey High Speed Transit Line 1
1965 News Briefs. 1965-01   2.0 MB
South Joliet, IL 2
1929 C. & A. Modernizes Signaling Facilities   2.2 MB
1934 Centralized Traffic Control Installed on the Alton   1.7 MB
South Litchfield, IL 1
1962 News Briefs. 1962-10   457.3 KB
South Louisville, KY 1
1947 CTC Down by the Ohio   2.7 MB
South Mt. Vernon, NY 1
1924 Signal Development in Connection With Single Phase Propulsion   5.1 MB
South Pekin, IL 1
1963 News Briefs. 1963-11   1.4 MB
South Pembroke, NC 2
1962 News Briefs. 1962-02   1.4 MB
1962 News Briefs. 1962-05   831.1 KB
South St. Paul, MN 1
1965 Midwest RRs fight the weather   914.3 KB
South Street, PA 1
1935 Automatic Interlocking on the Philadelphia Elevated   6.1 MB
South Tower, GA 1
1955 News Briefs. 1955-08   801.6 KB
South Upton, IL 1
1926 North Shore Line Installs Two Electric Interlockers   2.1 MB
South Walthourville, GA 1
1955 News Briefs. 1955-08   801.6 KB
South Whitley, IN 2
1928 Early APB Signaling   408.5 KB
1943 New York, Chicago & St. Louis Installs Centralized Traffic Control on Busy Sections of Single Track   7.9 MB
Southern 70
1927 Additional Solutions to Call-On Signal Circuit Problem   2.8 MB
1936 Alining Signals on Curves   3.7 MB
1949 Applications to ICC 1949-11   926.1 KB
1930 Approach-Lighting a Leaving Signal   1.0 MB
1933 Are Switch Lamps Needed?   506.3 KB
1950 Big NX Interlocking at Atlanta   6.3 MB
1933 Call-On Signals   930.2 KB
1933 Call-On Signals (editorial)   1.0 MB
1956 Centralia Has Protection of All Crossings   6.7 MB
1947 Choice of Interlocking Control Machines   266.5 KB
1947 Construction of Towers   213.3 KB
1953 Control of Four Layouts Consolidated in One Interlocking   5.3 MB
1935 Crossing Bells at Flasher Signals   1.9 MB
1932 Crossing Problem   2.6 MB
1935 Crossing Signals on the Southern   1.4 MB
1931 Derails in Passing Sidings   1.1 MB
1950 Double to Single Track with Remote Control   4.2 MB
1951 Double Track to Single With CTC   197.9 KB
1919 Electric Interlocking at Charlottesville,VA   530.2 KB
1935 Facing Point Locks on Switches   3.2 MB
1937 Height of Light Signals   1.0 MB
1946 ICC 50-MPH Signal Hearing   6.9 MB
1935 Installation of Bond Wires   4.0 MB
1937 Instructing Enginemen on Signal Indications   2.7 MB
1940 Intermediate Signal Spacing and Control   2.1 MB
1930 Light-out Protection   1.1 MB
1935 Maintainers' Tool Houses   2.2 MB
1926 Marker Lights on Single Track   415.3 KB
1950 Modern Communications In Yards and Terminals   1.4 MB
1951 Modern Interlocking on the Norfolk & Western   710.2 KB
1951 More Signal Construction in 1950   1.0 MB
1955 Much is new in signaling for 1955   826.7 KB
1921 New Interlockings at Jacksonville Terminal   3.4 MB
1954 New Orleans Passenger Terminal   4.7 MB
1961 News Briefs. 1961-04   1.5 MB
1961 News Briefs. 1961-11   1.3 MB
1962 News Briefs. 1962-03   1.1 MB
1962 News Briefs. 1962-05   831.1 KB
1962 News Briefs. 1962-10   457.3 KB
1963 News Briefs. 1963-02   1.3 MB
1963 News Briefs. 1963-03   830.1 KB
1963 News Briefs. 1963-05   742.2 KB
1964 News Briefs. 1964-05   1.0 MB
1964 News Briefs. 1964-06   820.5 KB
1964 News Briefs. 1964-09   899.1 KB
1964 News Briefs. 1964-10   778.4 KB
1965 News Briefs. 1965-02   1.9 MB
1965 News Briefs. 1965-06   1.2 MB
1965 News Briefs. 1965-07   793.4 KB
1965 News Briefs. 1965-08   753.7 KB
1965 News Briefs. 1965-09   379.4 KB
1965 News Briefs. 1965-10   1.1 MB
1966 News Briefs. 1966-01   1.4 MB
1941 Non-Stop Permissive Signals   1.4 MB
1937 Ohio Flood Damages Signaling   9.7 MB
1927 Organization of Railroad Signal Departments   3.9 MB
1921 Proposed Modification of Stop-and-Proceed Rule   1.4 MB
1940 Remote Control On the Southern   3.8 MB
1928 Signal and Train Control Hearing Ends   2.0 MB
1928 Signal Aspects for "Head-In" Indication at Passing Track   1.0 MB
1928 Signals Should Keep Trains Moving   400.7 KB
1936 Slide Detector Fences   4.3 MB
1937 Switch Protection in Automatic Territory   3.0 MB
1947 Territories Involved in the ICC Signaling Order   399.0 KB
1924 Three Train Control Contracts Let   1.9 MB
1935 Traffic Type Signals for Protection of Highway-Railroad Crossings   2.5 MB
1926 Train Control Progress in 1925   3.1 MB
1954 Unique Combinations of Single-Track and Two-Track Developed on the Southern   3.8 MB
1920 Watch the Second Hand   731.6 KB
1928 Why Markers for Automatic Signals?   494.6 KB
Southern Pacific 102
1943 A Review of 1942   2.9 MB
1934 An Electric Interlocking on the Southern Pacific   1.8 MB
1936 Annunciator Circuits   2.6 MB
1962 Automatic Dispatching   2.1 MB
1935 Automatic Interlocking Involves Highway Crossing Signals   3.4 MB
1928 Automatic Signals Within Yard Limits   1.0 MB
1923 Cabin Interlockings for Crossings   1.5 MB
1962 Centralization – Dispatch Circuits Are Changing   1.3 MB
1932 Centralized Traffic Control   3.1 MB
1943 Centralized Traffic Control Speeds War Traffic on 80.5-Mile Section of the Southern Pacific   10.3 MB
1935 Checking Rail Ends on Drawbridges   2.5 MB
1935 Checking Signal Lamps   3.3 MB
1965 Collision due to signal failure   647.8 KB
1956 Conelrad – A Civil Defense Measure … How Some Railroads are Participating   4.1 MB
1954 CTC Improves Train Operation   3.3 MB
1950 CTC on Sunset Route   3.1 MB
1935 Depression Operation of Interlocking   2.6 MB
1933 Economics of Modern Signaling   2.1 MB
1935 Electric Interlocking in Snow Sheds on the Southern Pacific   8.2 MB
1915 Electro-Pneumatic Plant at San Francisco   2.4 MB
1935 Facing Point Locks on Switches   3.2 MB
1935 Flashing Aspects   1.3 MB
1947 How Low Is a Dwarf?   438.7 KB
1946 ICC 50-MPH Signal Hearing   6.9 MB
1947 ICC Holds Signal Hearing   507.5 KB
1937 Instructing Enginemen on Signal Indications   2.7 MB
1937 Interlocking and Signaling For New Bridge at New Orleans   5.9 MB
1935 Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
1950 Interlocking Plant Horns   2.3 MB
1956 Interlocking Relays   3.9 MB
1936 Lost Motion in Locking   3.0 MB
1935 Maintainers' Tool Houses   1.1 MB
1927 Marking Signals When Out of Service   1.1 MB
1939 Mission Tower Interlocking at Los Angeles   9.2 MB
1955 Modern communications essential to efficient railroading   696.7 KB
1946 More Difficult to Get a Call-On Signal   488.8 KB
1936 Motor Car Indicators   2.9 MB
1955 Much is new in signaling for 1955   826.7 KB
1935 Multiple Aspect Signaling   3.3 MB
1936 New Electric Interlocking and Signaling at the Mississippi River Bridge at New Orleans   7.9 MB
1939 New Interlocking at Los Angeles   9.6 MB
1954 New Orleans Passenger Terminal   4.7 MB
1913 New Signaling Across the Great Salt Lake   2.2 MB
1930 New Type Rail Crossing Uses Turntable Principle   964.5 KB
1962 News Briefs. 1962-02   1.4 MB
1962 News Briefs. 1962-09   835.6 KB
1962 News Briefs. 1962-10   457.3 KB
1962 News Briefs. 1962-11   473.4 KB
1963 News Briefs. 1963-02   1.3 MB
1963 News Briefs. 1963-03   830.1 KB
1963 News Briefs. 1963-06   973.6 KB
1964 News Briefs. 1964-02   997.7 KB
1964 News Briefs. 1964-04   1.4 MB
1964 News Briefs. 1964-07   849.5 KB
1964 News Briefs. 1964-10   778.4 KB
1965 News Briefs. 1965-01   2.0 MB
1965 News Briefs. 1965-05   1.4 MB
1965 News Briefs. 1965-07   793.4 KB
1966 News Briefs. 1966-01   1.4 MB
1956 Photography   1.5 MB
1931 Protecting CTC Switches   2.9 MB
1944 Railroad Applications of Electronics   1.9 MB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
1911 Railway Signal Association Convention: Committee I: Signaling Practice   3.8 MB
1933 Reducing Unnecessary Train Stops   2.5 MB
1956 Release of Locking   3.7 MB
1962 Remote Control Interlocking Has Time Division Multiplex System   855.3 KB
1935 Removal of Switch Indicators   2.3 MB
1939 Repairing Spring Switch Mechanisms   1.8 MB
1935 Repeating Reverse Signal Indication   2.9 MB
1965 RLEA objects to 11 RS&I changes   1.1 MB
1939 San Francisco-Oakland Bay Bridge Interlocking Plants   9.4 MB
1939 San Francisco-Oakland Bay Bridge Signaling and Interlocking   7.9 MB
1927 Should Motor Car Operators Watch Signals More Carefully   1.2 MB
1928 Signal and Train Control Hearing Ends   2.0 MB
1925 Signaling of Paired Track Operation   1.3 MB
1956 Small Flat Top Console for Controls And Separate Diagram for Indications   5.3 MB
1956 Snow Melters   2.6 MB
1947 Southern Pacific Installs CTC   990.2 KB
1945 Southern Pacific Installs CTC on 72 Miles of Single Track   5.6 MB
1941 Southern Pacific Installs Interlocking at Drawbridge   6.3 MB
1940 Southern Pacific Petition Denied   3.0 MB
1940 Southern Pacific Washes Insulators   1.5 MB
1962 SP Has 500 Miles of Automatic CTC   363.6 KB
1954 SP Modernizes Automatic Block   2.0 MB
1948 Special Gate Circuits in Houston   1.4 MB
1937 Special Locking Release   2.4 MB
1931 Speed Control of Crossing Signals   586.7 KB
1936 Street Traffic Signals Controlled by Trains   5.1 MB
1937 Switch Protection in Automatic Territory   3.0 MB
1932 Testing OS Track Circuits   926.0 KB
1911 The Staff System on the Southern Pacific   4.0 MB
1925 The Train Control Situation   853.0 KB
1963 Theory and Operation of Grade Crossing Predictor is Explained   840.9 KB
1932 Track Capacity   2.7 MB
1926 Train Control Progress in 1925   3.1 MB
1956 Train Operations When CTC Fails   3.5 MB
1939 Trains Directed by Signal Indication at San Jose, California   4.1 MB
1936 What Is the Capacity of a Single-Track Line?   2.0 MB
1920 What Scheme of Signaling is Most Desirable?   6.8 MB
1955 What's the Answer? CTC Into Service   409.5 KB
1916 William Robinson, Inventor of the Track Circuit   373.1 KB
Southern Pines, NC 1
1935 Remote Control on the Seaboard   5.4 MB
Southern Railway 1
1926 Four-Aspect Color-Light Signals Installed on English Road   2.8 MB
Southport Jct., LA 1
1936 New Electric Interlocking and Signaling at the Mississippi River Bridge at New Orleans   7.9 MB
Southport, LA 1
1954 New Orleans Passenger Terminal   4.7 MB
Soviet Union 1
1933 Modern Signaling in Soviet Russia   3.3 MB
space reservation 1
1950 New Developments   16.9 MB
Spanish Lake, MO 1
1961 News Briefs. 1961-06   718.3 KB
Sparks, NV 1
1964 News Briefs. 1964-04   1.4 MB
Sparta, MN 2
1944 CTC Speeds Ore Traffic On the DM&IR   4.6 MB
1962 DM&IR Consolidates CTC Control Miles   384.7 KB
Spartanburg, SC 1
1953 CTC Keeps Trains Moving on Long Grades   6.3 MB
Spaulding, IL 2
1958 CTC Handles 15 More Trains   2.2 MB
1938 EJ&E Installs APB Signaling   3.1 MB
speed checker 1
1949 Yardsticks   947.2 KB
speed control 2
1965 AFO circuits can be used in subways   682.4 KB
1952 Speed Control Installed on the Long Island   1.3 MB
speed limits 4
1946 ICC 50-MPH Signal Hearing   6.9 MB
1946 ICC Signal Hearing   1.3 MB
1946 ICC Signaling Investigation   770.4 KB
1936 Speed Limits at Automatic Interlocking   3.2 MB
speed recorders 1
1961 What’s the Answer? 1961-04   960.3 KB
speed restrictions 1
1913 Speed Restrictions on the Chicago & North Western   722.9 KB
speed selection 1
1951 Special Protection Problems Solved With Gates and Flashers   1.5 MB
speed signaling 1
1947 Speed Indicators for High-Speed Turnouts   298.4 KB
speeds 1
1937 Track Layout for CTC   1.2 MB
Speer, WY 1
1955 CTC and cab signaling on Union Pacific   789.5 KB
Spencer, NC 1
1924 Three Train Control Contracts Let   1.9 MB
Spencer, WI 3
1949 192 Miles of Automatic Block On Soo Line   6.0 MB
1947 ICC Signal Hearings   179.7 KB
1952 Soo Line Completes Signaling on 260 Miles of Single Track   737.7 KB
Spencerville, IN 1
1950 CTC on the Wabash   2.6 MB
Spokane, Portland & Seattle 2
1947 Signals and Slide Fences on the Spokane, Portland & Seattle   1.8 MB
1947 Territories Involved in the ICC Signaling Order   399.0 KB
Spokane, WA 9
1961 News Briefs. 1961-06   718.3 KB
1961 News Briefs. 1961-12   971.1 KB
1962 News Briefs. 1962-02   1.4 MB
1962 News Briefs. 1962-07   509.0 KB
1962 News Briefs. 1962-10   457.3 KB
1963 News Briefs. 1963-03   830.1 KB
1965 News Briefs. 1965-07   793.4 KB
1921 Train Order Deliverer Expedites Traffic   1.3 MB
1956 When Dispatchers Move ... Carrier Saves Wire Pair   1.3 MB
Spokane, WI 1
1962 News Briefs. 1962-07   509.0 KB
spring switches 39
1937 Alton Uses Spring Switches on Ends of Double Track   5.0 MB
1947 Automatic Block With Spring Switches installed on the Georgia Railroad   851.4 KB
1946 Automatic Block With Spring Switches on the Central of Georgia   5.3 MB
1947 Automatic Signaling With Spring Switches Installed on the Great Northern   734.1 KB
1956 Burlington Has Modified CTC for Medium Traffic Single-Track   7.2 MB
1951 Burlington Installs Extensive Interlocking at Kansas City   1.0 MB
1951 Burlington Simplifies CTC for Light-Traffic Single Track   1.7 MB
1944 Canadian Pacific Installs Automatic Block Signaling   6.8 MB
1942 Chicago's Newest Subway Has Automatic Block Signaling and Train Stop   457.5 KB
1944 Coded Track Circuits for CTC and Cab Signaling   4.0 MB
1937 CTC in Coaling Station Territory   6.6 MB
1951 CTC on Single Track Permits Removal of Second Main on 22.4 Miles on Boston & Maine   924.4 KB
1936 Demands for Modern Signaling   12.1 MB
1940 Facing Point Lock for Spring Switches   1.2 MB
1940 Facing Point Locks On Main Line Switches   2.6 MB
1935 FPL Adjustment on Spring Switches   1.3 MB
1955 How to run reverse temporarily   197.6 KB
1949 ICC Issues Statistics   850.7 KB
1944 L&N Installs CTC On an Engine District   9.0 MB
1937 Location of Signals at Spring Switches   1.3 MB
1950 New Rules, Standards and Instructions Issued by the Interstate Commerce Commission   7.9 MB
1961 News Briefs. 1961-11   1.3 MB
1951 P&WV Signals Entire Main Line   3.9 MB
1951 Power Switches and Spring Swiches in CTC on the Frisco   1.2 MB
1942 Railroad Signals Go to War   11.4 MB
1944 Remote Control Interlocking on the D&RGW   4.3 MB
1939 Repairing Spring Switch Mechanisms   1.8 MB
1944 Rock Island Installs Cab Signaling and Centralized Traffic Control   10.0 MB
1950 Rules, Standards and Instructions   1.5 MB
1937 Seaboard Utilizes Spring Switches   8.4 MB
1935 Signaling at Spring Switches   2.6 MB
1938 Signaling at Spring Switches   930.3 KB
1945 Signaling for Spring Switches   579.1 KB
1947 Signals and Slide Fences on the Spokane, Portland & Seattle   1.8 MB
1952 Soo Line Completes Signaling on 260 Miles of Single Track   737.7 KB
1954 SP Modernizes Automatic Block   2.0 MB
1937 Spring Switch at Branch Line Terminus   5.0 MB
1950 Spring Switch Signaling   2.5 MB
1929 The Year 1928 in Retrospect and the Outlook for 1929   1.5 MB
Spring Valley, IL 3
1944 Coded Track Circuits for CTC and Cab Signaling   4.0 MB
1944 Rock Island Installs Cab Signaling and Centralized Traffic Control   10.0 MB
1949 Signaling Adapted to Traffic On the Rock Island   5.2 MB
Spring, TX 1
1963 News Briefs. 1963-08   1.2 MB
Springfield, IL 5
1931 Chicago & Illinois Midland Installs Electric Interlocking   2.5 MB
1950 Gulf, Mobile & Ohio Protects All Street Crossings in Springfield   2.6 MB
1945 Manual Block-Remote Control Developed On the Wabash   5.7 MB
1950 OSing Device   1.4 MB
1935 Semi-Automatic Interlocking at a Crossing on the Alton   4.4 MB
Springfield, MA 1
1915 Extension of New Haven signals   684.8 KB
Springfield, MO 6
1950 Frisco Moves CTC Machines Without Interrupting Traffic   2.9 MB
1947 Frisco Moves CTC to One Office   481.1 KB
1965 Merging divisions require changing circuits   339.6 KB
1950 Modern Communications In Yards and Terminals   1.4 MB
1951 More Signal Construction in 1950   1.0 MB
1965 News Briefs. 1965-01   2.0 MB
Springfield, OH 1
1963 News Briefs. 1963-11   1.4 MB
Springlake, KY 1
1965 News Briefs. 1965-08   753.7 KB
Spruce Creek, PA 1
1926 Directing Trains By Signals   1.9 MB
Spruce, MN 1
1944 CTC Speeds Ore Traffic On the DM&IR   4.6 MB
SS protection 1
1950 SS Protection   2.1 MB
St. Albans, WV 2
1961 News Briefs. 1961-10   1.0 MB
1963 News Briefs. 1963-03   830.1 KB
St. Augustine, FL 1
1964 News Briefs. 1964-12   998.6 KB
St. Charles Air Line 2
1932 Burlington Installs Extensive New Electric Interlocking   3.6 MB
1931 One Electric Interlocking for Two Drawbridges   3.1 MB
St. Charles, MO 1
1937 Signaling on the Wabash   3.7 MB
St. Cloud, MN 1
1947 Automatic Signaling With Spring Switches Installed on the Great Northern   734.1 KB
St. Francis, WI 1
1935 New Signaling on the Route of the C&NW "400"   9.6 MB
St. Joe, IN 3
1950 CTC on the Wabash   2.6 MB
1962 News Briefs. 1962-02   1.4 MB
1963 News Briefs. 1963-04   908.1 KB
St. John, IN 1
1963 News Briefs. 1963-01   971.6 KB
St. Joseph, MI 2
1949 Modern Signaling on a Division   6.6 MB
1946 Pere Marquette Installs CTC   3.1 MB
St. Joseph, MO 1
1961 Should Sidings Have Circuits?   347.6 KB
St. Lambert, Quebec 2
1943 Canadian National Installs a Large All-Relay Electric Interlocking   8.8 MB
1915 Victoria Jubilee Bridge Protection   570.0 KB
St. Louis Southwestern 12
1954 CTC Increases Capacity of Double Track   4.2 MB
1954 CTC into Service   2.5 MB
1946 CTC on 121 Miles of the Cotton Belt   6.4 MB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
1936 Reconstruction of Interlocking at the Dallas Union Terminal   14.8 MB
1928 Signal and Train Control Hearing Ends   2.0 MB
1941 Signaling on 47 Miles of St. Louis Southwestern   12.6 MB
1944 St. Louis Southwestern Installs Centralized Traffic Control   6.9 MB
1947 Territories Involved in the ICC Signaling Order   399.0 KB
1944 Track Circuits on Passing Tracks in CTC Territory   941.8 KB
1956 Train Operations When CTC Fails   3.5 MB
1954 Why Cotton Belt Installed CTC On 429 Miles of Single Track   4.0 MB
St. Louis Southwestern of Texas 1
1947 Territories Involved in the ICC Signaling Order   399.0 KB
St. Louis Union Station 2
1947 Choice of Interlocking Control Machines   266.5 KB
1930 Interlocking at St. Louis Union Station Expanded 30 Per Cent   1.7 MB
St. Louis, Brownsville & Mexico 1
1947 Territories Involved in the ICC Signaling Order   399.0 KB
St. Louis, MO 28
1931 A Lesson from a False-Clear Failure   572.9 KB
1941 All-Relay Signal System Installed on Terminal Railroad of St. Louis   1.2 MB
1929 Automatic Crossing Signals Used in Congested District   1.6 MB
1928 Burlington Completes Automatic Signals Chicago to Denver   5.1 MB
1947 Choice of Interlocking Control Machines   266.5 KB
1957 Consolidation Cuts Costs   3.1 MB
1956 Crossing Protection In Industrial Area   3.1 MB
1947 Crossover protection on the GM&O   2.6 MB
1947 CTC Down by the Ohio   2.7 MB
1939 Drag Detectors Protect Bridges   3.2 MB
1940 Fire Destroys Tower of Large Interlocking at St. Louis   2.0 MB
1939 Interconnection of Train Signals and Crossing Protection   1.1 MB
1930 Interlocking at St. Louis Union Station Expanded 30 Per Cent   1.7 MB
1908 Interlocking Facilities of the St. Louis Terminal Railroad Assn. of St. Louis   7.2 MB
1941 Interlocking Restored to Service At St. Louis Union Station   3.6 MB
1931 New Interlocking for the St. Louis Municipal Bridge   2.9 MB
1955 News Briefs. 1955-08   801.6 KB
1965 News Briefs. 1965-01   2.0 MB
1956 NX Control Replaces Lever Machine   2.8 MB
1940 Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
1935 Safety of High Speed Trains   5.2 MB
1931 Sand Causes Signal Failure   614.1 KB
1933 Signaling of New Terminal   1.6 MB
1911 Signaling on the Illinois Traction System   1.5 MB
1951 Single-Track With CTC Handles 40 Trains Daily   530.8 KB
1939 St. Louis Municipal Bridge Signaling   3.8 MB
1940 St. Louis Terminal   403.1 KB
1926 Train Control Progress in 1925   3.1 MB
St. Louis, San Francisco & Texas 1
1947 Territories Involved in the ICC Signaling Order   399.0 KB
St. Louis-San Francisco 51
1943 Accident Involves Signaling   1.0 MB
1935 Advantages of Modern Relays   4.0 MB
1937 Approach Indications to Train Order Signals   4.2 MB
1926 Are Smash-Boards Necessary at Automatic Crossing Plants?   816.3 KB
1955 Both ways on both tracks with CTC   765.0 KB
1938 Clearing of Signals at Automatic Interlockings   2.2 MB
1956 CTC Signs   1.8 MB
1931 Efficiency Tests   1.9 MB
1932 Electric Lock on Spring Switch   399.3 KB
1927 Electric Locking Protection at Interlockers Operated Without Derails   1.1 MB
1932 False Change of Lineup   850.0 KB
1929 Frisco Installs Semaphores with Color-Light Indication   665.1 KB
1950 Frisco Moves CTC Machines Without Interrupting Traffic   2.9 MB
1947 Frisco Moves CTC to One Office   481.1 KB
1933 Frisco Uses Semaphores With Color Light Indication   1.1 MB
1956 Interlocking Phones   2.3 MB
1934 Lamp Ratings for Flashing Lights   695.8 KB
1965 Merging divisions require changing circuits   339.6 KB
1950 Modern Communications In Yards and Terminals   1.4 MB
1955 Much is new in signaling for 1955   826.7 KB
1956 New Three-Track Interchange Includes Interlocking and Talk-Backs   8.9 MB
1955 News Briefs. 1955-08   801.6 KB
1962 News Briefs. 1962-02   1.4 MB
1962 News Briefs. 1962-03   1.1 MB
1962 News Briefs. 1962-07   509.0 KB
1965 News Briefs. 1965-01   2.0 MB
1956 NX Control Replaces Lever Machine   2.8 MB
1951 Power Switches and Spring Swiches in CTC on the Frisco   1.2 MB
1937 Railroad Grade Crossing Gates   2.2 MB
1936 Reconstruction of Interlocking at the Dallas Union Terminal   14.8 MB
1956 Release of Locking   3.7 MB
1928 Reporting False Clear Indications   648.8 KB
1940 Route Type Interlocking at Tower Grove in St. Louis   11.1 MB
1926 Semaphore or Light Signals?   1.4 MB
1928 Signal and Train Control Hearing Ends   2.0 MB
1949 Signaling Saves Time on Frisco   4.8 MB
1944 St. Louis-San Francisco Installs Centralized Traffic Control   8.3 MB
1961 Survey Tells How Railroads Use Hotbox Detectors   1.8 MB
1956 Switch Machines for CTC   2.0 MB
1947 Territories Involved in the ICC Signaling Order   399.0 KB
1934 The Safety Feature of Signals   456.5 KB
1925 The Train Control Situation   853.0 KB
1926 Train Control Progress in 1925   3.1 MB
1962 Trains Control Automatic Bridge   1.2 MB
1937 Unusual Signaling Trouble   2.2 MB
1950 Unusual Trouble   3.0 MB
1956 Walkie-Talkies   1.5 MB
1920 What Scheme of Signaling is Most Desirable?   6.8 MB
1929 What Type of Release at Automatic Interlockers?   1.0 MB
1965 What's the Answer? 1965-07   629.7 KB
1928 Why Markers for Automatic Signals?   494.6 KB
St. Luc, Quebec 1
1950 Consolidation of Interlockings   2.5 MB
St. Paul, MN 11
1928 Burlington Completes Automatic Signals Chicago to Denver   5.1 MB
1963 GN Radio Works in Tunnel   1.1 MB
1928 GN Replaces Semaphores with Color Light Signals   1.2 MB
1947 ICC Holds Signal Hearing   507.5 KB
1947 ICC Signal Hearings   179.7 KB
1965 Midwest RRs fight the weather   914.3 KB
1935 New Signaling on the Route of the C&NW "400"   9.6 MB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
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
Stamford, CT 3
1915 Extension of New Haven signals   684.8 KB
1916 Reconstruction of New Haven Signals   315.5 KB
1924 Signal Development in Connection With Single Phase Propulsion   5.1 MB
Standard Code 5
1911 A Comparison of the Interlocking Laws of the Various States   2.6 MB
1935 Multiple Aspect Signaling   3.3 MB
1947 Speed Indicators for High-Speed Turnouts   298.4 KB
1939 The Problem of Medium Speed   835.3 KB
1928 Train Signs or Indicators   468.2 KB
standard plans 1
1921 The Use of a Standard System of Nomenclature   337.6 KB
Standard Signal 2
1954 General Railway Signal Company Enters Fiftieth Year   1.6 MB
1936 T. George Stiles Rounds Out 60 Years of Signaling   2.5 MB
Standard Telephones & Cables 1
1964 Train Describers: A step toward ATI   2.1 MB
Stanley, OH 4
1928 Dispatcher Signaling System Operates Through Sleet Storm   1.1 MB
1928 Electric Plant on NYC Replaces Two Mechanical Plants   3.2 MB
1927 NYC First to Install Complete Train Dispatching System   8.0 MB
1931 Results of Centralized Control on NYC   703.8 KB
Staples, Crawford E. 2
1964 AFO can solve highway crossing problems   1.9 MB
1965 AFO circuits can be used in subways   682.4 KB
Staples, MN 3
1964 News Briefs. 1964-01   555.4 KB
1964 News Briefs. 1964-02   997.7 KB
1964 News Briefs. 1964-07   849.5 KB
Starck, P. A. 1
1928 Changes on the C&NW   978.4 KB
Starke, FL 1
1965 News Briefs. 1965-10   1.1 MB
Starne, IL 1
1945 Manual Block-Remote Control Developed On the Wabash   5.7 MB
starting signals 1
1943 CTC on the Bessemer & Lake Erie   8.7 MB
State Line interlocking 1
1956 Plastic Track Model Is Big Picture for Levermen   1.4 MB
State Line, IN 2
1931 Centralized Traffic Control Installed on Wabash   5.6 MB
1910 Mechanical Interlocking at State Line   1.0 MB
State Line, WI 1
1937 Route Control Interlocking – A New Signaling Development   2.9 MB
Staten Island Rapid Transit 1
1934 Electric Interlocking on Staten Island Lines of the Baltimore & Ohio   1.2 MB
station overlaps 1
1951 Automatic Block Without Line Wires on the Kansas City Southern   723.0 KB
station protection signal 1
1947 Hoosac Tunnel Interlocking and CTC   1.7 MB
station protection signals 1
1947 Signals and Slide Fences on the Spokane, Portland & Seattle   1.8 MB
station time control 1
1952 Chicago's Newest Subway Has Automatic Block Signaling and Train Stop   1.1 MB
station time signals 2
1944 Automatic Signaling, Train Stop, and Route Interlocking Installed in the Chicago Subways   8.6 MB
1949 Signaling and Interlocking On New Line of New York Subways   6.5 MB
station timers 1
1955 New Cleveland Transit System   911.5 KB
stations 1
1936 Annunciator Circuits   2.6 MB
statutes 1
1910 Interlocking Laws in the United States and Canada   821.1 KB
Staunton, CA 1
1926 Train Control Progress in 1925   3.1 MB
Staunton, IL 1
1911 Signaling on the Illinois Traction System   1.5 MB
Staunton, VA 3
1923 C&O Installs Signaling With Train Control   5.8 MB
1928 C&O Signaling and Train Control Facilitate Operation   4.1 MB
1965 News Briefs. 1965-01   2.0 MB
Ste. Rosalie, Quebec 1
1951 Canadian National Installs Centralized Traffic Control On a 117-Mile Sub-Division   501.4 KB
Stecher, C. G. 2
1915 Compensation of Pipe Lines   319.6 KB
1917 The Use of Photography in Signaling   432.5 KB
steel ties 2
1943 Railway Signaling in North Africa   3.5 MB
1965 Rhodesia has 1215 miles of CTC   949.2 KB
Steele, VA 1
1935 Centralized Traffic Control on the Chesapeake & Ohio   6.2 MB
Stella, TX 1
1954 CTC Improves Train Operation   3.3 MB
Sterling Run, PA 1
1937 Ends of Double Track Controlled by CTC   12.4 MB
Sterling, OH 3
1945 Accident at Movable Point Crossing   546.8 KB
1910 The Multiple Unit Electric Interlocking Machine   1.5 MB
1909 Union Switch & Signal’s Inspection Trip   1.5 MB
Sterrett, AL 1
1946 Automatic Block With Spring Switches on the Central of Georgia   5.3 MB
Stevens Point, WI 4
1963 News Briefs. 1963-10   518.0 KB
1965 News Briefs. 1965-05   1.4 MB
1965 News Briefs. 1965-09   379.4 KB
1965 News Briefs. 1965-10   1.1 MB
Stevens, T. S. 1
1911 Railway Signal Association Convention: Committee I: Signaling Practice   3.8 MB
Stevenson, AL 1
1955 What CTC did for the Dixie Line   889.8 KB
Steward Jct., IL 2
1930 Burlington Installs Centralized Control on Nine Miles of Double Track   1.8 MB
1943 Centralized Traffic Control Installed on 39 Miles of the Burlington   6.1 MB
stick circuits 1
1956 Interlocking Relays   3.9 MB
Stockholm Spårvägar 2
1965 Japan, Sweden, England test ATO   6.3 MB
1954 Modern Signaling in New Subways in Stockholm, Sweden   6.7 MB
Stockholm subway 1
1963 News Briefs. 1963-01   971.6 KB
Stockholm, Sweden 3
1964 Eight cities test automatic train operation   1.1 MB
1965 Japan, Sweden, England test ATO   6.3 MB
1954 Modern Signaling in New Subways in Stockholm, Sweden   6.7 MB
Stockton, CA 4
1947 Annual Review and Outlook   425.1 KB
1962 Automatic Dispatching   2.1 MB
1962 News Briefs. 1962-11   473.4 KB
1947 Railroads Request Relief from the ICC Signal Order   365.7 KB
Stockton, IL 1
1911 Automatic Signals on the Chicago Great Western   7.4 MB
Stoltz, C. F. 1
1940 Personal: Changes on the New York Central   2.2 MB
stop and proceed 2
1921 Stop or Proceed vs. Stop and Proceed   335.2 KB
1921 Stop or Proceed vs. Stop and Proceed [reply]   330.8 KB
stop indication 1
1951 What's the Answer? Stop Signals in CTC   274.3 KB
stop signs 1
1961 News Briefs. 1961-03   1.0 MB
Storvik, Sweden 1
1965 Rhodesia has 1215 miles of CTC   949.2 KB
Strawberry, KY 1
1947 CTC Down by the Ohio   2.7 MB
streamlined passenger trains 4
1935 Cab Signals and ATC on UP Streamliner   2.1 MB
1936 Demands for Modern Signaling   12.1 MB
1937 Track Shunting Problems   947.3 KB
1937 Track Shunting Problems   2.5 MB
Streator, IL 1
1929 Automatic Interlocker Saves Over 8,000 Train Stops Annually   1.7 MB
Stroudsburg, PA 1
1961 News Briefs. 1961-07   654.1 KB
Sturtevant, WI 2
1943 Centralized Traffic Control on the Milwaukee   2.8 MB
1964 News Briefs. 1964-09   899.1 KB
Style CDP relay 1
1941 Code-Following Polar Track Circuit Relay   1.4 MB
Style P4 relay 1
1941 P4 Code-Following Relay   1.1 MB
Style TR signal 1
1924 A New Triangular Light Signal   1.7 MB
Styles, T. George 1
1936 T. George Stiles Rounds Out 60 Years of Signaling   2.5 MB
suburban passenger service 1
1963 Signal changes make transit run on railroad   1.1 MB
Sudbury, Ontario 1
1962 News Briefs. 1962-06   980.1 KB
Suffern, NY 2
1935 New Automatic Signals Increase Track Capacity and Safety on the Erie   6.4 MB
1934 New Signaling Increases Track Capacity on the Erie   2.0 MB
Suffolk, VA 1
1950 Neon Lighting For Crossing Gate Arms   3.1 MB
Sugar City, CO 1
1938 Adapting Signaling to Requirements   1.7 MB
Sugar Land, TX 2
1954 CTC Improves Train Operation   3.3 MB
1961 Should Sidings Have Circuits?   347.6 KB
Suisun Bay, CA 1
1935 Interlocking on Southern Pacific Suisun Bay Bridge   4.6 MB
Sullivan, IN 1
1928 C&EI Installs Automatic Interlocker at Main Line Crossing   3.7 MB
Sunbury, PA 3
1920 Electro-Mechanical Interlocker at Sunbury, PA   538.5 KB
1924 Results of Train Control Test on Pennsylvania   3.1 MB
1925 Train Operation by Signal Indications – Especially by Cab Signals   1.3 MB
Superior, WI 1
1915 Duluth Terminal Trestle Signaling   2.3 MB
Surrey, ND 2
1961 News Briefs. 1961-07   654.1 KB
1962 News Briefs. 1962-01   979.5 KB
Suspension Bridge, NY 1
1963 News Briefs. 1963-03   830.1 KB
Sutton, ND 1
1964 News Briefs. 1964-04   1.4 MB
Swanders, OH 1
1954 CTC Moves Heavy Trains   4.1 MB
Swanson, W. W. 1
1925 Train Operation by Signal Indication on Burlington for 14 Years   679.2 KB
Swedeborg, MO 2
1947 Frisco Moves CTC to One Office   481.1 KB
1944 St. Louis-San Francisco Installs Centralized Traffic Control   8.3 MB
Sweden 2
1954 Modern Signaling in New Subways in Stockholm, Sweden   6.7 MB
1913 The AGA flashlight a success in Sweden   331.0 KB
Swedish State Railroads 1
1937 Railway Signaling by Wireless   1.6 MB
swing-away barriers 1
1965 Crossing protection gets new look   490.1 KB
Swiss Federal Railways 1
1922 Controlled Manual Block in Hauenstein Tunnel   3.4 MB
Swissvale, PA 2
1937 Remote Control on the Pennsylvania   5.2 MB
1913 The Union’s Signaling Exhibition Room   1.5 MB
switch and lock movement 1
1915 Switch and Lock Movements in Mechanical Plants   2.0 MB
switch circuit controllers 3
1940 Facing Point Locks On Main Line Switches   2.6 MB
1935 Inspecting Switch Circuit Controllers   1.7 MB
1935 Switch-Stand Selector   1.9 MB
switch engines 1
1947 Burlington Uses Radio on Switchers   909.1 KB
switch heaters 3
1961 Check Switch Heaters Now   297.3 KB
1955 CTC and cab signaling on Union Pacific   789.5 KB
1965 News Briefs. 1965-04   1.5 MB
switch indicators 2
1935 Removal of Switch Indicators   2.3 MB
1937 Switch Indicators Serve as Interlocking Control Devices   5.6 MB
switch lamps 3
1962 Electric Switch Lamp Lighting Helps Reduce Operating Expense   661.7 KB
1937 Electric Switch Lamps on the Santa Fe   4.5 MB
1937 Switch Lamps in Automatic Territory   1.2 MB
switch locks 3
1950 New Developments   16.9 MB
1941 Protection at Hand-Thrown Switches in CTC Territory   1.6 MB
1943 Signals Ordered on the Kansas City Southern   1.4 MB
switch machine 1
1947 Signaling and Interlocking in Italy   684.8 KB
switch machine controller 1
1950 New Developments   16.9 MB
switch machines 5
1949 Main Line Crossovers   2.4 MB
1935 Obsolescence in Signaling   3.4 MB
1956 Switch Machines for CTC   2.0 MB
1956 Switch Machines for CTC   985.3 KB
1935 Switch-Stand Selector   1.9 MB
switch points 1
1935 Operating Long Switch Points   2.4 MB
switch protection 2
1941 Protection at Hand-Thrown Switches in CTC Territory   1.6 MB
1937 Switch Protection in Automatic Territory   3.0 MB
switchboards 1
1956 CN Telegraph Moves Into Its New Home   8.1 MB
switches 2
1935 Facing Point Locks on Switches   3.2 MB
1940 Testing Switches   1.1 MB
switching 1
1964 Individual radios carried by crewmen can aid yard work   549.7 KB
switching signals 1
1950 CTC Extended on the Rio Grande   4.4 MB
switchtender 1
1955 At Portland Terminal, combined interlocking   810.6 KB
Switzerland 1
1922 Controlled Manual Block in Hauenstein Tunnel   3.4 MB
SY Tower, WV 1
1952 CTC Pays Its Way on B&O   733.2 KB
Sycamore, IL 1
1911 Automatic Signals on the Chicago Great Western   7.4 MB
symbols 2
1911 Suggestions as to the Standard Symbols   1.9 MB
1911 Symbols and Nomenclature for Written Circuits   2.3 MB
Symington (Winnipeg), Manitoba 1
1962 News Briefs. 1962-09   835.6 KB
Syncroscan 1
1964 NYC Moves CTC Point of Control   1.2 MB
Syracuse Jct. 1
1936 New York Central Interlocking at Syracuse   15.9 MB
Syracuse, NY 5
1936 All-Relay Interlocking On NYC at Syracuse   29.7 MB
1936 New York Central Interlocking at Syracuse   15.9 MB
1961 News Briefs. 1961-01   755.2 KB
1961 News Briefs. 1961-07   654.1 KB
1962 News Briefs. 1962-04   1.2 MB
São Paulo, Brazil 1
1961 Brazilian Automated CTC Will Make Meets   1.2 MB

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