Railway Signaling | T

NOTE:

Although all of these digitized articles are 60 or more years old, and likely have minimal commercial value today, the reader should bear in mind that material dated after 1923 remains under copyright by Simmons-Boardman Publishing.

These articles and the information contained therein may be freely reproduced or used in printed or electronic form for non-commercial or educational purposes, provided the copyright holder and original author (if known) are acknowledged, and provided that such publication also refers readers to the original document on this site.

Simply making interesting material available to those who share my interest in the railway signal systems of the past has been my sole objective in this long project.

Learn more about this collection.

"TRAIN" indicators 4

1920	A Train Sign Used As an Indicator 258.9 KB
1951	Approach Train Indicators 402.6 KB
1935	Automatic Interlockings of Two Junctions Involving Spring Switches 8.9 MB
1916	TRAIN signs on the Santa Fe 258.1 KB

T&NO Jct., TX 1

1954	CTC Improves Train Operation 3.3 MB

T&P Jct., TX 1

1935	Collision on the T&P 2.0 MB

T. George Stiles 4

1947	Drawbridge Interlocking on the Elgin, Joliet & Eastern 647.3 KB
1937	New Devices- March 1937 18.1 MB
1936	T. George Stiles Rounds Out 60 Years of Signaling 2.5 MB
1935	Test Equipment for Highway Crossing Signals 1.1 MB

table interlocking 1

1958	CN consolidates interlockings 2.1 MB

table lever interlocking 2

1954	Loudspeakers and Interlocking Improve Yard Operation 4.7 MB
1924	Low-Voltage Interlocking on C&NW 1.6 MB

Tacoma, WA 3

1960	"Dry" message duplication saves money 234.7 KB
1962	News briefs. 1962-02 1.4 MB
1962	News briefs. 1962-05 826.8 KB

tail track signals 1

1949	Signaling Saves Time on Frisco 4.8 MB

take-siding indicator 1

1951	Power Switches and Spring Swiches in CTC on the Frisco 1.2 MB

Talbotts, NC 1

1961	News briefs. 1961-04 1.5 MB

talking hotbox detectors 1

1962	Hotbox Detectors Talk 2.0 MB

Tallahassee, FL 2

1964	News briefs. 1964-08 811.5 KB
1964	News briefs. 1964-11 797.3 KB

Tama, IA 1

1918	Maintaining an Interlocking Plant at High Tide 241.8 KB

Tamms, IL 1

1948	CTC Big Help to GM&O 1.7 MB

Tampa, FL 2

1947	Annual Review and Outlook 425.1 KB
1956	Gates at 21 Crossings 6.6 MB

Tapiales, Argentina 1

1960	News briefs. 1960-06 1.2 MB

Tarrytown, NY 2

1963	News briefs. 1963-01 951.3 KB
1922	The Sprague Train Control System 609.3 KB

Tates Point, OH 1

1922	Work in Signal Field Shows Gain Over 1920 784.5 KB

Tateville, KY 2

1955	Much is new in signaling for 1955 826.7 KB
1954	Unique Combinations of Single-Track and Two-Track Developed on the Southern 3.8 MB

Taylor Signal 1

1936	Wilmer W. Salmon, President of General Railway Signal Company, Dies 2.8 MB

Taylor, John D. 2

1954	General Railway Signal Company Enters Fiftieth Year 1.6 MB
1921	Progress of Railroad Signaling in America 731.8 KB

Tebbets, MO 1

1943	Lap Order Results in an Accident 818.6 KB

Techny, IL 1

1933	Consolidated Interlockings 1.8 MB

Tehama, CA 1

1963	News briefs. 1963-06 961.3 KB

telegraph 7

1944	Centennial of Morse Telegraph 6.6 MB
1962	Centralization – Dispatch Circuits Are Changing 1.3 MB
1956	CN Telegraph Moves Into Its New Home 8.1 MB
1958	RS&C 50th anniversary: Railroad communications ... from Morse to microwave 3.3 MB
1958	RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB
1944	St. Louis-San Francisco Installs Centralized Traffic Control 1.1 MB
1921	The Development of the Printing Telegraph 4.8 MB

telegraph centennial 2

1944	Centennial of Morse Telegraph 6.6 MB
1944	St. Louis-San Francisco Installs Centralized Traffic Control 1.1 MB

telephone circuits 1

1962	Telephone Signaling Principles 1.6 MB

telephone communication 1

1963	Special Report: P&LE Signaling and Communications 3.9 MB

telephone dispatching 1

1958	RS&C 50th anniversary: Looking ahead 652.9 KB

telephone exchange 1

1908	A New 10,000 Line Telephone Exchange for Paris, France 2.2 MB

telephone poles 1

1949	Raising Poles 1.9 MB

telephone service 1

1950	More Communications Needed With the 40-Hour Week 1.2 MB

telephone signaling 1

1962	Telephone Signaling Principles 1.6 MB

telephone train order signals 1

1936	Interlocking and Remote Control on Erie 18.9 MB

telephones 2

1941	Illinois Central Uses Automatic Telephone System on Chicago Terminal Area 5.8 MB
1950	Telephones at Signals 1.1 MB

teletype 1

1939	Milwaukee Utilizes Teletype 1.6 MB

Temple Mills, London, England 1

1960	British install automatic yard near London 348.3 KB

Temple, TX 2

1947	Railroads Request Relief from the ICC Signal Order 365.7 KB
1922	Signal Construction on the Santa Fe 797.6 KB

Tennessee Pass 1

1929	D&RGW Expedites Trains With Centralized Control 2.1 MB

Terminal Association of St. Louis 10

1957	Consolidation cuts costs 1.1 MB
1955	Crossing gate protection with indicators for train movements 432.4 KB
1908	Interlocking Facilities of the St. Louis Terminal Railroad Assn. of St. Louis 7.2 MB
1955	News briefs. 1955-08 830.4 KB
1960	News briefs. 1960-03 1.9 MB
1961	News briefs. 1961-04 1.5 MB
1965	News briefs. 1965-01 2.0 MB
1959	Signaling: 1960 225.2 KB
1957	Survey shows progress in signal education 330.6 KB
1958	What's the answer? Crossing indicators 509.4 KB

Terminal Cut-off Jct., Manitoba 1

1958	Nine layouts in one interlocking 1.7 MB

Terminal Island Jct. 1

1943	Pacific Electric Installs a Large All-Relay Interlocking 5.3 MB

Terminal Railroad Association of St. Louis 13

1941	All-Relay Signal System Installed on Terminal Railroad of St. Louis 1.2 MB
1956	Crossing Protection In Industrial Area 3.1 MB
1950	Crossing Protection With Indicators for Train Movements 4.5 MB
1940	Fire Destroys Tower of Large Interlocking at St. Louis 2.0 MB
1943	Fire-Proof Construction 11.6 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
1956	NX Control Replaces Lever Machine 2.8 MB
1931	Sand Causes Signal Failure 614.1 KB
1950	Special Interlocking Controls 2.2 MB
1939	St. Louis Municipal Bridge Signaling 3.8 MB
1940	St. Louis Terminal 403.1 KB
1950	Train Signals for Highway Crossings 1.4 MB

Terminal Tower, Los Angeles, CA 1

1939	New Interlocking at Los Angeles 9.6 MB

terminals 1

1950	Modern Communications In Yards and Terminals 1.4 MB

Terre Haute, IN 7

1944	A Collision Despite Automatic Signals 2.7 MB
1929	Big Four Improves Operation by Remote Control 2.5 MB
1948	CTC Keeps ‘em Rollin’ on C&EI 2.1 MB
1952	CTC Machine Hangs High But Trains Run 704.9 KB
1965	News briefs. 1965-01 2.0 MB
1940	Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line 13.1 MB
1941	Protection at Hand-Thrown Switches in CTC Territory 1.6 MB

test equipment 1

1935	Test Equipment for Highway Crossing Signals 1.1 MB

test set 1

1939	Testing Sets 2.0 MB

testing 14

1935	Checking Signal Lamps 3.3 MB
1940	D.C. Test Set For Relays, Slots 3.7 MB
1950	DC Track Circuit Trouble 1.6 MB
1940	Hook-On Volt-Ammeter 1.3 MB
1935	New and Unusual Signal and Relay Repair Shop on the Chicago Rapid Transit 9.0 MB
1956	Signal Lamp Test 1.4 MB
1956	Signal Lamp Test 950.0 KB
1935	Test Equipment for Highway Crossing Signals 1.1 MB
1936	Testing Automatic Interlockings 3.5 MB
1940	Testing Insulated Joints 2.1 MB
1936	Testing New Interlocking 1.7 MB
1936	Testing New Interlocking 3.5 MB
1940	Testing Switches 1.1 MB
1958	What’s the answer? Interlocking check 175.3 KB

testing circuits 1

1940	Shunting Straps for Testing 890.4 KB

Texarkana, AR 6

1958	MP consolidates CTC machines 797.2 KB
1948	New Signaling In Texas on Missouri Pacific Lines 1.8 MB
1963	News briefs. 1963-08 1.2 MB
1944	Track Circuits on Passing Tracks in CTC Territory 941.8 KB
1954	Why Cotton Belt Installed CTC On 429 Miles of Single Track 4.0 MB
1957	Why Cotton Belt installed CTC on entire main line 914.0 KB

Texas 1

1911	A Comparison of the Interlocking Laws of the Various States 2.6 MB

Texas & New Orleans 11

1954	CTC Improves Train Operation 3.3 MB
1933	Graphic Recorders 843.3 KB
1937	Interlocking and Signaling For New Bridge at New Orleans 5.9 MB
1936	Maintainers' Blueprint Plans 4.2 MB
1936	New Electric Interlocking and Signaling at the Mississippi River Bridge at New Orleans 7.9 MB
1961	News briefs. 1961-10 1.0 MB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1936	Reconstruction of Interlocking at the Dallas Union Terminal 14.8 MB
1961	Should Sidings Have Circuits? 347.6 KB
1935	Switch-Stand Selector 1.9 MB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

Texas & Pacific 33

1935	Centralized Traffic Control on the Texas & Pacific 5.1 MB
1938	Changing Relays 1.7 MB
1935	Collision on the T&P 2.0 MB
1928	Color Light Train Order Signals Are Effective 2.9 MB
1960	From the field 945.2 KB
1937	Interlocking and Signaling For New Bridge at New Orleans 5.9 MB
1936	Lights Interfere With View of Signals 2.3 MB
1935	Maintainers' Tool Houses 2.2 MB
1957	New control system for automatic block uses track circuits only 1.8 MB
1936	New Electric Interlocking and Signaling at the Mississippi River Bridge at New Orleans 7.9 MB
1954	New Orleans Passenger Terminal 4.7 MB
1948	New Signaling In Texas on Missouri Pacific Lines 1.8 MB
1955	News briefs. 1955-08 830.4 KB
1960	News briefs. 1960-05 1.0 MB
1935	Night Intensity of Signal Lamps 2.1 MB
1935	Pole Lines for Automatic Signaling 1.6 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
1930	Red Flash in Polarized-Control Signaling 811.1 KB
1928	Signal and Train Control Hearing Ends 2.0 MB
1957	Signal controls by track circuit only 575.8 KB
1961	Survey Tells How Railroads Use Hotbox Detectors 1.8 MB
1937	Switch Protection in Automatic Territory 3.0 MB
1960	T&P moves CTC machine 78 miles 423.0 KB
1947	Territories Involved in the ICC Signaling Order 388.2 KB
1949	Texas & Pacific New All-Relay Interlocking 4.3 MB
1944	Track Circuits on Passing Tracks in CTC Territory 941.8 KB
1950	Two Single Tracks, Side By Side 1.4 MB
1937	Unusual Signaling Trouble 2.2 MB
1937	What is in Store for the Signal Field? 1.8 MB
1930	What Protection at Drawbridges? 3.5 MB
1958	What's the answer? Crossing circuits 254.4 KB
1928	Why Markers for Automatic Signals? 494.6 KB

Texico, NM 3

1960	News briefs. 1960-03 1.9 MB
1960	News briefs. 1960-10 1.8 MB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB

Texmo Jct., LA 2

1947	Railroads Request Relief from the ICC Signal Order 365.7 KB
1957	Signal controls by track circuit only 575.8 KB

Thackerville, TX 1

1922	Signal Construction on the Santa Fe 797.6 KB

Thalmann, GA 2

1943	Centralized Traffic Control Installed On 64.6 Miles of the Seaboard 7.1 MB
1944	Track Circuits on Passing Tracks in CTC Territory 941.8 KB

Thayer, MO 2

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB
1965	News briefs. 1965-01 2.0 MB

The Dalles, OR 1

1951	More Signal Construction in 1950 1.0 MB

The Signal Engineer 1

1958	RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB

Thebes, IL 2

1954	CTC Increases Capacity of Double Track 4.2 MB
1957	Why Cotton Belt installed CTC on entire main line 914.0 KB

Thermal, CA 2

1962	Automatic Dispatching 2.1 MB
1962	SP Has 500 Miles of Automatic CTC 363.6 KB

Thirsk, England 1

1934	Re-Signaling the London North Eastern of England 3.0 MB

Thompson, NY 1

1960	News briefs. 1960-10 1.8 MB

Thompson, T. B. 2

1953	News 2.2 MB
1950	Personal: T. B. Thompson 1.1 MB

Thorn Hill, OH 1

1960	News briefs. 1960-09 756.9 KB

Thorndale, PA 2

1938	Interlocking Changes on the Pennsylvania 4.9 MB
1938	Pennsylvania Electrification Signaling 5.3 MB

Thornton, IL 1

1916	New Automatic Signals on Grand Trunk 997.0 KB

Thornton, Scotland 1

1959	Britain's first automatic yard 312.0 KB

Three Forks, MT 2

1917	Light Signals On CM&StP 781.9 KB
1916	Signaling the Milwaukee's Electric Zone 624.8 KB

Thurston Street interlocking, Elmira, NY 1

1958	DL&W-Erie joint operation is ready to go 643.6 KB

Tidewater & Western 1

1932	An Early Automatic Interlocking 411.4 KB

Tilford Yard, Atlanta, GA 3

1963	News briefs. 1963-02 1.3 MB
1963	News briefs. 1963-05 720.2 KB
1965	News briefs. 1965-01 2.0 MB

Tilton, IL 1

1941	Automatics Installed on the Wabash 4.0 MB

time element relays 3

1936	Accuracy of Timing Relays 2.2 MB
1949	Controlled Overlaps for Single-Track APB Signaling 1.5 MB
1939	DC Time Element Relay 1.9 MB

time locking 8

1950	Approach Distances and Times 5.5 MB
1943	Approach or Time Locking 897.5 KB
1956	CTC Locking 2.2 MB
1958	How to save time when trains are entering yards 513.6 KB
1943	Norfolk & Western Installs CTC on 14 Miles of Single Track 4.4 MB
1959	P&LE installs multiple track CTC 1.1 MB
1958	What's the answer? CTC locking 269.2 KB
1961	What’s the Answer? 1961-04 960.3 KB

time releases 1

1950	Approach Distances and Times 5.5 MB

time zones 1

1922	News of the Month. 1922-09 562.2 KB

timekeeping 1

1940	Make-Up-Time Chart 813.1 KB

Times Square, New York, NY 2

1964	Eight cities test automatic train operation 1.1 MB
1961	News briefs. 1961-11 1.3 MB

Times Square-Grand Central shuttle, New York, NY 4

1962	1962 outlook 3.0 MB
1960	News briefs. 1960-03 1.9 MB
1962	News briefs. 1962-10 461.7 KB
1960	Subway train is automatic 552.2 KB

timetable and train order 5

1960	Fourteen RRs adopt new operating code 945.4 KB
1941	A Simplified Signaling Arrangement For the Direction of Trains by Signal Indications 5.5 MB
1958	How to adapt CTC to your traffic 748.3 KB
1959	ICC reports on Erie wreck 440.4 KB
1958	RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB

timing 1

1940	Effecting Time Delay for Relays 933.3 KB

Tiskilwa, IL 1

1946	Rock Island Uses Carrier Equipment for Automatic OS Reports 3.9 MB

Titicut, MA 1

1922	Flashlight Crossing Signal 280.8 KB

Tokaido Line 3

1963	Automated Rail Transit Discussed by IEEE-ASME 315.3 KB
1965	Japan, Sweden, England test ATO 6.3 MB
1963	News briefs. 1963-08 1.2 MB

Tokyo, Japan 5

1963	Automated Rail Transit Discussed by IEEE-ASME 315.3 KB
1964	Eight cities test automatic train operation 1.1 MB
1962	Electronic Track Circuits 740.3 KB
1965	Japan, Sweden, England test ATO 6.3 MB
1963	News briefs. 1963-08 1.2 MB

Toledo & Ohio Central 4

1933	Economics of Modern Signaling 2.1 MB
1920	Electric Interlocking at Bellefontaine, Ohio 3.8 MB
1927	NYC First to Install Complete Train Dispatching System 8.0 MB
1925	Traffic Reversal on Double Track by Signal Indication 1.5 MB

Toledo Terminal 2

1922	News of the Month. 1922-12 388.1 KB
1928	Pennsylvania Installs an Interlocking Without Derails 2.3 MB

Toledo, OH 10

1958	Central opens Young Yard 2.5 MB
1937	New Automatics on the C&O 5.0 MB
1960	News briefs. 1960-03 1.9 MB
1960	News briefs. 1960-05 1.0 MB
1965	News briefs. 1965-01 2.0 MB
1965	News briefs. 1965-10 1.1 MB
1957	Pushbutton CTC Machine on NYC Is First of Its Kind 3.3 MB
1956	Remote Control Converted to CTC 6.6 MB
1938	Signaling for Higher Train Speeds 3.9 MB
1958	Signaling to cut expenses in '58 411.4 KB

Toledo, Peoria & Western 2

1962	Electric Switch Lamp Lighting Helps Reduce Operating Expense 661.7 KB
1962	News briefs. 1962-10 461.7 KB

Tolleston, IN 1

1947	Crossing Protection in Gary, Indiana 1.6 MB

Tolono, IL 2

1941	Automatics Installed on the Wabash 4.0 MB
1942	Wabash Installs Automatics 5.8 MB

Toltec, NM 1

1922	News of the Month. 1922-11 361.5 KB

Tomkins, O. S. 1

1928	Changes on the C&NW 978.4 KB

Tontogany, OH 1

1932	Centralized Traffic Control on the Baltimore & Ohio 4.4 MB

tool houses 3

1935	Maintainers' Tool Houses 2.2 MB
1935	Maintainers' Tool Houses 3.5 MB
1935	Maintainers' Tool Houses 1.1 MB

Topeka, KS 4

1936	34 Train Stops Eliminated Daily by an Interlocking 10.4 MB
1941	Carrier Communication Equipment Installed on the Santa Fe 4.7 MB
1962	News briefs. 1962-01 986.8 KB
1949	Signaling Adapted to Traffic On the Rock Island 5.2 MB

tornado 1

1965	Midwest RRs fight the weather 914.4 KB

Toronto Terminals 5

1935	Circuits for Crossing Signals 1.5 MB
1937	False Clear Failures 2.0 MB
1931	Interlocking System Installed at Toronto Union Station 4.6 MB
1937	Signals in Advance of Switches 1.1 MB
1935	Trap Circuits at Railroad Crossings 4.6 MB

Toronto Transit 3

1961	News briefs. 1961-01 761.9 KB
1964	News briefs. 1964-02 992.4 KB
1962	Toronto Railway Conference – Automatic Train Operation 448.4 KB

Toronto, Hamilton & Buffalo 2

1965	News briefs. 1965-01 2.0 MB
1955	What's the Answer? CTC Into Service 409.5 KB

Toronto, Ontario 16

1960	CNR uses speed selection for gates 980.7 KB
1962	Computer Simulation of CTC 220.3 KB
1964	Gate Control is by GCPs 1.4 MB
1931	Interlocking System Installed at Toronto Union Station 4.6 MB
1955	News briefs. 1955-08 830.4 KB
1960	News briefs. 1960-02 995.4 KB
1960	News briefs. 1960-07 845.4 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
1963	News briefs. 1963-05 720.2 KB
1963	News briefs. 1963-06 961.3 KB
1964	News briefs. 1964-02 992.4 KB
1964	News briefs. 1964-04 1.3 MB
1953	One Control Machine for Interlocked Yard Area 4.2 MB
1962	Toronto Railway Conference – Automatic Train Operation 448.4 KB

torpedo fusee 1

1950	New Developments 16.9 MB

torpedoes 2

1937	Flag and Torpedo Containers 903.1 KB
1919	Legal Decisions on the Use of Torpedoes for Signaling Purposes 355.6 KB

Torrence Ave. bridge, Chicago, IL 1

1965	News briefs. 1965-04 1.5 MB

Tower 1, St. Louis, MO 1

1908	Interlocking Facilities of the St. Louis Terminal Railroad Assn. of St. Louis 7.2 MB

Tower 2, St. Louis, MO 1

1908	Interlocking Facilities of the St. Louis Terminal Railroad Assn. of St. Louis 7.2 MB

Tower 3, St. Louis, MO 1

1908	Interlocking Facilities of the St. Louis Terminal Railroad Assn. of St. Louis 7.2 MB

Tower "A", Cheyenne, WY 1

1955	CTC and cab signaling on Union Pacific 789.5 KB

Tower "U", New York, NY 1

1921	Fire Threatened Tie Up At Grand Central Terminal 1.5 MB

Tower A, Omaha, NE 2

1951	Remote Control Interlocking Coordinates Train Movements 922.4 KB
1931	Three Large Interlockings Installed by Union Pacific at Omaha 6.2 MB

Tower A-3, Chicago, IL 1

1958	CTC Handles 15 More Trains 2.2 MB

Tower B, Omaha, NE 1

1931	Three Large Interlockings Installed by Union Pacific at Omaha 6.2 MB

Tower B-12, Franklin Park, IL 1

1958	CTC Handles 15 More Trains 2.2 MB

Tower B-17, Bensenville, IL 1

1958	CTC Handles 15 More Trains 2.2 MB

Tower B-35, Elgin, IL 1

1958	CTC Handles 15 More Trains 2.2 MB

Tower C, Omaha, NE 1

1931	Three Large Interlockings Installed by Union Pacific at Omaha 6.2 MB

Tower Grove, MO 1

1940	Route Type Interlocking at Tower Grove in St. Louis 11.1 MB

Tower Hill, IL 1

1951	Single-Track With CTC Handles 40 Trains Daily 530.8 KB

Tower HU, KS 1

1959	Santa Fe CTCs double track line 2.2 MB

Tower No. 1, Kansas City, MO 1

1955	News briefs. 1955-08 830.4 KB

Tower No. 2, Kansas City, MO 1

1955	News briefs. 1955-08 830.4 KB

Tower NY, IL 1

1931	Three-Track Signaling on 13.5 Miles of the C&NW 5.4 MB

towers 2

1911	Interlocking on the North Western Terminal 7.6 MB
1911	Signaling and Interlocking on the North Western Terminal in Chicago 1.1 MB

track circuit 1

1916	William Robinson, Inventor of the Track Circuit 373.1 KB

track circuits 41

1916	AC Signaling for Chicago Terminals 585.7 KB
1964	AFO can solve highway crossing problems 1.9 MB
1965	AFO circuits can be used in subways 676.7 KB
1935	An Improved Track Circuit for Light-Weight Equipment 2.4 MB
1947	Application of Code Principles to Signaling 406.6 KB
1923	Automatics on Paris Grande Ceinture 5.0 MB
1919	Block Signaling Practice on a British Railway (Part 2) 484.7 KB
1939	Checking Track Circuits From a Motor Car 837.6 KB
1947	DC Track Circuit Measurements 291.6 KB
1950	DC Track Circuit Trouble 1.6 MB
1935	DC Track Circuits 963.2 KB
1962	Electronic Track Circuits 740.3 KB
1915	First Position Light Signal Installation 580.6 KB
1965	GCPs can be used for various types of grade crossings 369.4 KB
1947	Highway Crossing Protection Installed by Several Railroads in Gary, IndianaR 1.2 MB
1956	How to Control Signals Safely Where Lightweight Trains are Operated 8.4 MB
1949	Insulation of Rails 874.8 KB
1922	Locking Arrangement for Movable Point Crossing Frogs 527.0 KB
1944	Necessities or Frills in Centralized Traffic Control 1.0 MB
1960	News briefs. 1960-08 603.8 KB
1943	Progress in the Use of Coded Track Circuits 1.6 MB
1921	Progress of Railroad Signaling in America 731.8 KB
1959	Recent track circuit developments 1.2 MB
1956	Release of Locking 3.7 MB
1935	Respacing Automatics on the Pennsylvania 1.8 MB
1958	RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB
1935	Safety of High Speed Trains 5.2 MB
1964	San Francisco will test four ATO systems 1.4 MB
1929	Scientific Research on Track Circuits 844.6 KB
1927	Should Track Circuit Polarities Be Staggered 427.4 KB
1927	Should Track Circuit Polarities be Staggered? 1.5 MB
1937	Shunt Sensitivity and Broken Rail Protection 4.3 MB
1951	South Shore Line Records Gate Operations 375.1 KB
1940	Testing Insulated Joints 2.1 MB
1931	The AC DC Track Circuit 1.5 MB
1957	Track circuit developments in Europe 234.8 KB
1943	Track Circuit Numbers 2.2 MB
1944	Track Circuits on Passing Tracks in CTC Territory 941.8 KB
1937	Track Shunting Problems 947.3 KB
1937	Track Shunting Problems 2.5 MB
1949	Train Operation By Signal Inidication Used Extensively on the Nickel Plate 6.1 MB

track diagram 1

1960	Miniature track diagram 334.7 KB

track instruments 2

1937	New Devices- March 1937 18.1 MB
1957	Track circuit developments in Europe 234.8 KB

track motor cars 1

1963	News briefs. 1963-06 961.3 KB

track occupancy detection 1

1937	Track Occupancy Indications in CTC Territory 2.7 MB

track relays 1

1939	Track Relay Release Time 1.6 MB

Tracy, CA 3

1962	News briefs. 1962-11 468.1 KB
1922	News of the Month. 1922-09 562.2 KB
1926	Train Control Progress in 1925 3.1 MB

traffic control 1

1962	News briefs. 1962-07 494.2 KB

traffic control system 8

1950	New Rules, Standards and Instructions Issued by the Interstate Commerce Commission 7.9 MB
1962	News briefs. 1962-02 1.4 MB
1962	News briefs. 1962-04 1.2 MB
1962	News briefs. 1962-05 826.8 KB
1962	News briefs. 1962-06 989.1 KB
1962	News briefs. 1962-08 675.9 KB
1962	News briefs. 1962-10 461.7 KB
1950	Rules, Standards and Instructions 1.5 MB

traffic direction indication 1

1951	Traffic Direction Indication 152.0 KB

traffic levers 1

1955	CTC enables P&LE to remove fourth main track 515.3 KB

traffic locking 3

1921	A New Idea in Traffic Locking On the C&O 1.7 MB
1950	CTC on the Reading 6.6 MB
1950	Two Single Tracks, Side By Side 1.4 MB

traffic signals 4

1936	Street Traffic Signals Controlled by Trains 5.1 MB
1957	Traffic signals and crossing gates coordinated in Cumberland, MD 730.3 KB
1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB
1955	Unusual control for crossing protection 722.1 KB

traffic simulation 1

1962	Computer Simulation of CTC 220.3 KB

train communication 3

1950	Continuity of Train Communication 2.6 MB
1947	Medals Awarded by Franklin Institute 236.3 KB
1962	Toronto Railway Conference – Automatic Train Operation 448.4 KB

train communications systems 1

1961	ICC Reports on Railroad Safety 194.7 KB

train control 28

1925	A. H. Rudd Discusses Train Control at Philadelphia Engineers' Club 2.8 MB
1922	Automatic Train Control Hearing Is Concluded at Washington 12.1 MB
1931	Automatic Train Control on Great Western of England 1.7 MB
1931	British Report on Automatic Train Control 2.6 MB
1925	Division Train Control Installation on C&EI Approved by ICC 2.9 MB
1922	Final Train Control Order Issued by ICC 417.4 KB
1925	Final Train Control Order Issued by ICC 4.1 MB
1922	Four Recent Train Control Studies 7.9 MB
1946	ICC 50-MPH Signal Hearing 6.9 MB
1922	ICC Proposes to Order Train Control on 49 Roads 376.4 KB
1946	ICC Signal Hearing 1.3 MB
1946	ICC Signaling Investigation 770.4 KB
1925	News of the Month (July 1925) 680.1 KB
1926	Open Switch Protection in Train Control Installations 451.3 KB
1925	Preliminary Report on C&NW Train Control 929.6 KB
1925	Reports of Three Interim Inspections 1.4 MB
1929	Simplification of Apparatus Will Expand Usefulness of Signaling 1.3 MB
1922	Some Points to Consider in Selection of Train Control 22.6 MB
1953	The North Western Installs Automatic Train-Stop System 3.5 MB
1927	The Public Is Interested in Signaling 444.4 KB
1925	The Train Control Situation 853.0 KB
1929	The Year 1928 in Retrospect and the Outlook for 1929 1.5 MB
1922	Train Control Approved by the British 7.0 MB
1925	Train Control Inspection Reports 1.7 MB
1925	Train Control Progress in 1924 3.8 MB
1926	Train Control Progress in 1925 3.1 MB
1929	What Is the Future of Train Control? 1.8 MB
1928	What Is to Be Gained by Train Stop or Train Control? 463.8 KB

train control order 3

1923	News of the Month. 1923-07 1.9 MB
1923	News of the Month. 1923-10 1.9 MB
1923	News of the Month. 1923-11 1.8 MB

train control ramps 1

1924	Rock Island Installs Train Control 847.9 KB

train describer 2

1939	San Francisco-Oakland Bay Bridge Interlocking Plants 9.4 MB
1939	San Francisco-Oakland Bay Bridge Signaling and Interlocking 7.9 MB

train detection 1

1963	Automated Rail Transit Discussed by IEEE-ASME 315.3 KB

train dispatching 3

1921	A Complete Train Despatching System 1.7 MB
1950	Centralized Train Dispatching 1.4 MB
1911	Train Dispatching on Interurban Railways 2.0 MB

train identification 4

1954	Junction Controlled Automatically 2.5 MB
1961	News briefs. 1961-09 886.8 KB
1960	Signal construction steady in 1959 385.2 KB
1959	Signaling moderate during '58 528.6 KB

train interference 1

1957	Why not more Centralized Traffic Control? 344.2 KB

train listener 1

1951	Single-Track With CTC Handles 40 Trains Daily 530.8 KB

train order delivery 1

1921	Train Order Deliverer Expedites Traffic 1.3 MB

train order fork 1

1950	Illuminated Train Order Fork 1.1 MB

train order lamp 1

1937	New Devices- March 1937 18.1 MB

train order operation 1

1935	Collision on the Erie 2.2 MB

train order signals 7

1937	Approach Indications to Train Order Signals 4.2 MB
1950	Flashing Signal Aspects 1.1 MB
1939	Light Signals as Train-Order Signals 918.5 KB
1937	Should Train Order Signals Control Automatic Signals 1.2 MB
1946	The User of Signaling 895.2 KB
1928	Train Order Indicators Used Successfully on the CI&L 604.3 KB
1940	Train Order Signals 4.2 MB

train orders 14

1954	CTC into Service 2.5 MB
1925	Eliminating the Written Train Order 2.8 MB
1946	ICC 50-MPH Signal Hearing 6.9 MB
1950	Illuminated Train Order Fork 1.1 MB
1958	RS&C 50th anniversary: Railroad communications ... from Morse to microwave 3.3 MB
1925	Signaling at the Age of Maturity 2.0 MB
1937	Special Locking Release 2.4 MB
1939	Speeding Up Train Operation With Signaling 4.5 MB
1923	Superintendents Discuss Form "19" 2.0 MB
1922	The Bryn Athyn Collision on the P&R 690.9 KB
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
1911	Train Dispatching on Interurban Railways 2.0 MB
1954	Train Operations When CTC Fails 2.0 MB

train radio 4

1960	Fourteen RRs adopt new operating code 945.4 KB
1950	Increase In Train Communication Systems 2.4 MB
1950	Modern Communications In Yards and Terminals 1.4 MB
1963	News briefs. 1963-03 790.6 KB

train separation 2

1963	Automated Rail Transit Discussed by IEEE-ASME 315.3 KB
1964	San Francisco will test four ATO systems 1.4 MB

train speeds 1

1937	Report of Committee X – Signaling Practice 2.9 MB

train staff 1

1922	A Rolling Pin as a Positive Staff 503.7 KB

train starting system 2

1915	Jersey City Terminal Interlocking 1.1 MB
1933	Simplified Interlocking Installed at the Dayton Terminal 700.6 KB

train stops 2

1944	Automatic Signaling, Train Stop, and Route Interlocking Installed in the Chicago Subways 8.6 MB
1940	Interlocking on the Hudson & Manhattan 6.8 MB

train telephone communication 1

1944	Train Telephone Communication 4.1 MB

train telephones 2

1937	Rocket Train Telephones 5.7 MB
1937	Zephyr Train Telephones 2.3 MB

train-phone 1

1958	Chicago Transit tests train-phone 282.5 KB

traingraph 1

1961	What’s the Answer? 1961-04 960.3 KB

training 2

1921	Educational Meetings On the Illinois Central 616.5 KB
1956	Training Program 2.1 MB

Trakode 6

1957	New control system for automatic block uses track circuits only 1.8 MB
1960	News briefs. 1960-07 845.4 KB
1958	One track does work of two on Maine Central 442.6 KB
1958	Remote control saves money 868.5 KB
1957	Signal controls by track circuit only 575.8 KB
1958	Special combinations of single-track and two-track replace double track on the Southern 960.9 KB

Trammells, AL 1

1960	News briefs. 1960-03 1.9 MB

Trammels, AL 1

1960	News briefs. 1960-04 896.6 KB

Transcona, Manitoba 2

1955	News briefs. 1955-08 830.4 KB
1958	Nine layouts in one interlocking 1.7 MB

Transcontrol 2

1959	AFO circuits protect crossing 554.0 KB
1960	News briefs. 1960-10 1.8 MB

transformers 2

1950	New Developments 16.9 MB
1935	New Devices 1.5 MB

transistors 2

1963	Solid State Devices 938.4 KB
1949	The Transistor 3.1 MB

transit expressway 1

1965	Transit vehicles set for automatic running 182.7 KB

transit strike 1

1915	Emergency Suburban Traffic 252.9 KB

Transport Products 1

1957	Traffic signals and crossing gates coordinated in Cumberland, MD 730.3 KB

Transport Workers Union 1

1962	1962 outlook 3.0 MB

trap circuits 4

1950	Bootleg Risers and Bonds 2.1 MB
1940	Trap Circuit 872.0 KB
1935	Trap Circuits at Railroad Crossings 4.6 MB
1958	What's the answer? Long dead sections 571.9 KB

Trenton, MO 2

1932	CRI&P Extends Centralized Control 2.6 MB
1945	The New Connections at Kansas City For Milwaukee and Rock Island 4.7 MB

Trenton, NJ 5

1946	Carryphone on the Pennsylvania 1.5 MB
1937	New Signaling on Pennsylvania 1.0 MB
1931	Signaling for Electrified Operation 3.5 MB
1933	Signaling on the Pennsylvania's Electrified Line 3.6 MB
1915	Trenton Electro-Mechanical Interlocking 1.7 MB

Trenton, OH 1

1960	News briefs. 1960-09 756.9 KB

Trevino, WI 1

1965	News briefs. 1965-11 1.2 MB

Trinidad, CO 1

1947	Railroads Request Relief from the ICC Signal Order 365.7 KB

trip stops 5

1916	AC Signaling in the Centre Street Loop 924.9 KB
1922	Automatic Train Control in Use On American Railroads 353.7 KB
1955	New Cleveland Transit System 917.8 KB
1960	Signal construction steady in 1959 385.2 KB
1958	Subway consolidates interlockings 2.2 MB

triple underpass, Dallas, TX 1

1936	Reconstruction of Interlocking at the Dallas Union Terminal 14.8 MB

tripstops 1

1960	News briefs. 1960-08 603.8 KB

Trissal, J. M. 3

1959	Grade crossing funds debated 242.0 KB
1947	Illinois Central Honors Radio “Hams” for Emergency Services 278.0 KB
1950	Personnel changes on the IC 1.4 MB

Trois Rivieres, Quebec 1

1931	Economy of Smaller Towers 539.7 KB

Troost Avenue, Kansas City, MO 1

1949	Entrance-Exit Interlocking Installed on Missouri Pacific 3.0 MB

Troy, MT 2

1922	News of the Month. 1922-04 613.8 KB
1922	News of the Month. 1922-06 516.2 KB

Troy, NY 2

1929	B&M Installs Either-Direction Signaling in Hoosac Tunnel 7.1 MB
1947	Hoosac Tunnel Interlocking and CTC 1.7 MB

Truckee, CA 2

1964	News briefs. 1964-07 833.0 KB
1911	The Staff System on the Southern Pacific 4.0 MB

Tuckahoe, WV 1

1936	Centralized Traffic Control on the Chesapeake & Ohio 4.3 MB

Tucker, IL 1

1922	News of the Month. 1922-09 562.2 KB

Tucson, AZ 2

1960	News briefs. 1960-04 896.6 KB
1954	SP Modernizes Automatic Block 2.0 MB

Tucson, NM 1

1962	SP Has 500 Miles of Automatic CTC 363.6 KB

Tucumcari, NM 2

1938	Adapting Signaling to Requirements 1.7 MB
1947	ICC Signal Hearings 179.7 KB

Tulsa, OK 3

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB
1965	Merging divisions require changing circuits 335.5 KB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB

Tunkhannock, PA 1

1966	News briefs. 1966-01 1.4 MB

tunnel fans 1

1951	Both Tracks Both Ways on Norfolk & Western 623.5 KB

tunnels 1

1956	Union Pacific Installs Protection For Motor Cars at Tunnels 3.2 MB

Turnbull, FL 1

1963	News briefs. 1963-11 1.4 MB

turnouts 1

1939	Track Turnouts and Signal Aspects 1.8 MB

Turrell, AR 1

1965	News briefs. 1965-01 2.0 MB

Tuscola, IL 1

1925	Illinois Central ATS contract: News of the Month (July 1925) 700.0 KB

Tuscor, MT 2

1965	News briefs. 1965-07 788.3 KB
1966	News briefs. 1966-01 1.4 MB

Tuscson, AZ 1

1959	Pushbutton console for CTC 785.3 KB

Tuxedo, NY 1

1959	ICC reports on Erie wreck 440.4 KB

Twig, MN 1

1922	News of the Month. 1922-09 562.2 KB

Two Harbors, MN 2

1944	CTC Speeds Ore Traffic On the DM&IR 4.6 MB
1962	DM&IR Consolidates CTC Control Miles 384.7 KB

two-position signaling 1

1940	Southern Pacific Petition Denied 3.0 MB

Tygart Jct., WV 1

1965	B&O would have used radio orders 565.5 KB

Tyler, TX 2

1954	Why Cotton Belt Installed CTC On 429 Miles of Single Track 4.0 MB
1957	Why Cotton Belt installed CTC on entire main line 914.0 KB

Type D signals 1

1935	New Signaling on the Route of the C&NW "400" 9.6 MB

Type E signals 3

1925	Color-Light Signals on C&NW 6.9 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1931	Three-Track Signaling on 13.5 Miles of the C&NW 5.4 MB

Type SA signals 2

1937	New Devices- March 1937 18.1 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB

Type SC signals 1

1940	New Searchlight Signal 2.7 MB

Tyrone Forge, PA 1

1926	Directing Trains By Signals 1.9 MB

Tyrone, PA 1

1947	CTC Saves Train Time on the Pennsylvania 1.5 MB

Railway Signaling: T