Railway Signaling: H

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.

"H" indicators 1

1961	Trainmen Read Hotbox Locator 1.1 MB

"HX" Tower, Hackensack, NJ 1

1949	Fast Work Laying Submarine Cable 3.1 MB

H searchlight signals 1

1940	Plug Couplers for Relays and Signals 1.3 MB

H-2 searchlight signals 7

1950	CTC Installed on 128 Miles of NKP 12.1 MB
1936	Interlocking and Remote Control on Erie 18.9 MB
1939	Plug Connector for "H-2" Searchlight Signals 1.1 MB
1940	Plug Couplers for Relays and Signals 1.3 MB
1937	Signal Construction on the Wabash 12.2 MB
1944	Signaling Modernized On the Pittsburgh & Lake Erie 4.7 MB
1937	Signaling on the Wabash 3.7 MB

H-5 searchlight signals 3

1939	Improved Searchlight Signal 3.3 MB
1949	New Automatic Block on the Katy 4.7 MB
1940	New Signaling on the Wabash 8.1 MB

Hackensack, NJ 1

1949	Fast Work Laying Submarine Cable 3.1 MB

Hadley, IN 1

1943	New York, Chicago & St. Louis Installs Centralized Traffic Control on Busy Sections of Single Track 7.9 MB

Hagerstown, MD 3

1951	Modern Interlocking on the Norfolk & Western 710.2 KB
1950	Neon Lighting For Crossing Gate Arms 3.1 MB
1926	Train Control Progress in 1925 3.1 MB

Haigh, A. S. 1

1940	Personal: Changes on the New York Central 2.2 MB

Halethorpe, MD 2

1959	News briefs. 1959-05 506.5 KB
1961	Railroad Will Pay For CTC Out Of Accrued Savings 842.9 KB

Haley, IN 1

1948	CTC Keeps ‘em Rollin’ on C&EI 2.1 MB

Haleyville, AL 1

1930	Illinois Central Installs Color Light Signals on 80 Miles 1.6 MB

half-interlocking 1

1915	A Half-Interlocking Plant on the Canadian Northern 1.6 MB

Hall disc signals 3

1944	Light-Type Signals Installed on the Reading 6.3 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 MB
1958	RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB

Hall dwarf signals 1

1925	Color-Light Signals on C&NW 6.9 MB

Hall searchlight signals 1

1923	News of the Month (November 1923) 1.8 MB

Hall Switch & Signal 10

1921	A New Light Signal 1.4 MB
1911	Automatic Signals on the Northern Pacific 7.2 MB
1924	Hall Position Color Light Signal 710.8 KB
1944	Light-Type Signals Installed on the Reading 6.3 MB
1923	News of the Month (November 1923) 1.8 MB
1921	Progress of Railroad Signaling in America 731.8 KB
1958	RS&C 50th anniversary: Railroad communications ... from Morse to microwave 3.3 MB
1916	Service Record of Position-Light Signals 580.8 KB
1910	The Hall Signal Company’s New Relay 1.4 MB
1936	Wilmer W. Salmon, President of General Railway Signal Company, Dies 2.8 MB

Hall, Thomas S. 1

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

ham radio 1

1947	Illinois Central Honors Radio “Hams” for Emergency Services 278.0 KB

Hamburg St., Baltimore, MD 1

1956	Interlocking Consolidation: Three Into One in Baltimore 6.8 MB

Hamburg, Germany 1

1960	News briefs. 1960-09 756.9 KB

Hamilton Jct., Ontario 2

1958	CN consolidates interlockings 2.1 MB
1927	Mechanical Interlocker on the Canadian Pacific 1.0 MB

Hamilton West, Ontario 1

1958	CN consolidates interlockings 2.1 MB

Hamilton, Ontario 2

1958	CN consolidates interlockings 2.1 MB
1964	News briefs. 1964-04 1.3 MB

Hamlet, NC 4

1947	Annual Review and Outlook 425.1 KB
1955	Much is new in signaling for 1955 826.7 KB
1962	News briefs. 1962-04 1.2 MB
1937	Seaboard Utilizes Spring Switches 8.4 MB

Hammond, IN 9

1931	Automatic Interlocker Protects Gauntlet Track 1.4 MB
1942	Chicago, Indianapolis & Louisiville Modernizes Automatic Signaling 3.9 MB
1910	Mechanical Interlocking at State Line 1.0 MB
1927	Miller Train Control On the Monon 582.2 KB
1941	Monon Changes Approved 760.8 KB
1918	Rear End Collision on the Michigan Central 471.2 KB
1951	South Shore Line Records Gate Operations 375.1 KB
1932	The Erie Installs Either-Direction Signaling 1.6 MB
1929	Trap Circuit for Drawbridge 980.8 KB

Hammond, LA 1

1960	News briefs. 1960-05 1.0 MB

Hampton Roads Transfer, VA 1

1959	Pushbutton console for CTC 785.3 KB

Hancock, MN 1

1957	GN CTC's 175 miles of mainline 635.9 KB

Hancock, WV 2

1962	News briefs. 1962-06 989.1 KB
1944	Remote Control Project Saves Train Time on the Baltimore & Ohio 3.5 MB

hand-throw crossivers 1

1951	Circuits for Crossovers on the Baltimore & Ohio 215.2 KB

hand-throw switches 1

1958	How to adapt CTC to your traffic 748.3 KB

Handy, IN 1

1962	News briefs. 1962-11 468.1 KB

Hannibal, MO 5

1950	Audible Warning Sounded When Dragging Equipment Detectors Operate 4.2 MB
1959	Burlington installs modified CTC 1.0 MB
1923	CB&Q Installs New Light Signals 4.1 MB
1945	Manual Block-Remote Control Developed On the Wabash 5.7 MB
1960	News briefs. 1960-09 756.9 KB

Hapeville, GA 1

1965	News briefs. 1965-10 1.1 MB

Harbor Creek, PA 3

1955	New York Central’s CTC – It’s Four Tracks to Two 4.1 MB
1955	News briefs. 1955-08 830.4 KB
1957	Where Two Tracks Do the Work of Four 3.2 MB

Hardin, MO 1

1960	News briefs. 1960-03 1.9 MB

Hardy, AL 1

1962	News briefs. 1962-10 461.7 KB

Harlowton, MT 2

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

Harold, NY 1

1952	Speed Control Installed on the Long Island 1.3 MB

Harpers Ferry, WV 3

1959	News briefs. 1959-05 506.5 KB
1961	News briefs. 1961-07 648.9 KB
1961	Railroad Will Pay For CTC Out Of Accrued Savings 842.9 KB

Harriman, WY 1

1955	CTC and cab signaling on Union Pacific 789.5 KB

Harrisburg, PA 7

1946	Carryphone on the Pennsylvania 1.5 MB
1930	New Interlocking on Pennsylvania at Harrisburg Replaces Three Old Plants 2.3 MB
1937	New Signaling on Pennsylvania 1.0 MB
1961	News briefs. 1961-12 978.0 KB
1938	Pennsylvania Electrification Signaling 5.3 MB
1928	Pennsylvania Installs Code System of Train Stop with Signaling 5.7 MB
1926	Train Control Progress in 1925 3.1 MB

Harrisburg, TX 1

1954	CTC Improves Train Operation 3.3 MB

Harrison, NJ 2

1935	Call-on Signal Involved In Accident 1.1 MB
1951	Pennsylvania Exhibits Speed Control 512.5 KB

Hartsburg, MO 1

1943	Lap Order Results in an Accident 818.6 KB

Harvard, IL 1

1913	New Block Signaling on the North-Western 1.8 MB

Harve, MT 1

1963	News briefs. 1963-06 961.3 KB

Harvey, IL 1

1916	New Automatic Signals on Grand Trunk 997.0 KB

Harwood, IN 1

1963	News briefs. 1963-05 720.2 KB

Hastings, MN 2

1934	Milwaukee to Use Cab Signals 699.1 KB
1926	Train Control Progress in 1925 3.1 MB

Hastings, NE 2

1947	Burlington Concentrates CTC Control at Division Headquarters 840.8 KB
1946	New Signal Control Line Circuits in Centralized Traffic Control Territory on the Burlington 2.8 MB

Hauenstein tunnel, Switzerland 1

1922	Controlled Manual Block in Hauenstein Tunnel 3.4 MB

Havana, IL 1

1950	OSing Device 1.4 MB

Havelock, NE 1

1955	CTC on single and double track 406.8 KB

Havre de Grace, MD 1

1937	Pennsylvania CTC Installation 7.0 MB

Havre, MT 6

1960	News briefs. 1960-01 1.1 MB
1960	News briefs. 1960-03 1.9 MB
1960	News briefs. 1960-06 1.2 MB
1960	News briefs. 1960-07 845.4 KB
1961	News briefs. 1961-06 725.8 KB
1962	News briefs. 1962-01 986.8 KB

Hawesville, KY 1

1947	CTC Down by the Ohio 2.7 MB

Hawthorne, IL 2

1925	Excellent Results for 35 Years on Burlington 1.5 MB
1913	Illinois Central Alternating Current Signaling 2.5 MB

Hayford, Chicago, IL 2

1958	Interlocking saves time and money for the Belt Railway of Chicago 2.0 MB
1940	Interlockings Installed at Two Crossings 6.5 MB

Hazelhurst, MS 1

1964	News briefs. 1964-05 1.0 MB

Hazelton, PA 1

1957	Lehigh Valley has check-in, check-out 755.3 KB

HD Jct., MO 1

1931	Missouri Pacific Installs Centralized Traffic Control on 32 Miles of Double Track 2.7 MB

headway 4

1963	Automated Rail Transit Discussed by IEEE-ASME 315.3 KB
1964	Automatic identity systems proposed 736.1 KB
1916	Methods of Locating Automatic Signals 428.3 KB
1963	Signal changes make transit run on railroad 1.1 MB

Heany Jct., Rhodesia 1

1965	Rhodesia has 1215 miles of CTC 949.2 KB

Heany Jct., Zimbabwe 1

1965	Rhodesia has 1215 miles of CTC 949.2 KB

Heard, WY 1

1955	CTC and cab signaling on Union Pacific 789.5 KB

Heavener, OK 4

1955	CTC moves trains on grades 762.8 KB
1960	News briefs. 1960-03 1.9 MB
1961	News briefs. 1961-02 1.4 MB
1962	News briefs. 1962-02 1.4 MB

Hebron, NM 1

1960	News briefs. 1960-03 1.9 MB

Heggestad, Robert 1

1966	Modular signal design is here 1.7 MB

Heggestad, Robert E. 1

1964	NYC Moves CTC Point of Control 1.2 MB

Helena, MT 2

1957	More automation for signaling in 1957 1.2 MB
1961	News briefs. 1961-07 648.9 KB

helper signal 1

1959	Santa Fe CTCs double track line 2.2 MB

Helper, UT 4

1937	CTC On the Denver & Rio Grande Western 8.0 MB
1955	One CTC Machine Replaces Three 451.9 KB
1944	Remote Control Interlocking on the D&RGW 4.3 MB
1944	Rio Grande has Longest CTC 9.2 MB

Hempstead, NY 1

1952	Speed Control Installed on the Long Island 1.3 MB

Henderson, KY 5

1947	CTC Down by the Ohio 2.7 MB
1936	Electric Lighting of Semaphores 867.6 KB
1939	Electric Lights for Semaphores 1.9 MB
1951	More Signal Construction in 1950 1.0 MB
1920	Train Operation by Means of Signal Indications 2.4 MB

Henley-on-Thames, England 1

1962	Electronic Interlocking 2.2 MB

Henrietta, MO 1

1960	News briefs. 1960-03 1.9 MB

Herington, KS 7

1938	Adapting Signaling to Requirements 1.7 MB
1947	Annual Review and Outlook 425.1 KB
1931	Another Unique Interlocker on the Rock Island 1.4 MB
1947	ICC Signal Hearings 179.7 KB
1948	Rock Island Adapts CTC to Medium-Traffic Single-Track Line 1.3 MB
1949	Signaling Adapted to Traffic On the Rock Island 5.2 MB
1931	Twelve-Track Yard Indicator on the Rock Island 888.5 KB

Hermon Pond, ME 1

1958	One track does work of two on Maine Central 442.6 KB

Hermosa, WY 1

1955	CTC and cab signaling on Union Pacific 789.5 KB

Hewitt, WI 1

1963	News briefs. 1963-10 497.4 KB

Hicksville, NY 2

1960	News briefs. 1960-04 896.6 KB
1963	News briefs. 1963-04 889.2 KB

Hicksville, OH 1

1965	News briefs. 1965-06 1.2 MB

Higgins, AR 1

1965	News briefs. 1965-01 2.0 MB

high load detector 1

1960	Electric eye catches high loads on NYC 352.5 KB

high water detectors 3

1955	CTC moves trains on grades 762.8 KB
1959	Fewer wayside observers makes automatic hazard detection necessary 1.1 MB
1939	Special Aspects for Detectors 937.0 KB

high-shunt track circuits 1

1959	Recent track circuit developments 1.2 MB

high-speed trains 9

1935	A Problem in Spacing Signals for Higher Train Speeds 1.6 MB
1935	An Improved Track Circuit for Light-Weight Equipment 2.4 MB
1936	Demands for Modern Signaling 12.1 MB
1935	Multiple Aspect Signaling 3.3 MB
1935	New Signaling on the Route of the C&NW "400" 9.6 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
1935	The "400" to Run on Six and One Half Hour Schedule 942.0 KB

high-speed turnouts 10

1955	Both ways on both tracks with CTC 765.0 KB
1950	High Speed Turnout Signaling 2.3 MB
1957	How to make non-stop meet with CTC 576.9 KB
1955	Much is new in signaling for 1955 826.7 KB
1958	One track does work of two 521.4 KB
1959	Santa Fe CTCs double track line 2.2 MB
1951	Signal Modernization Program on the RF&P 1.0 MB
1958	Signaling to cut expenses in '58 411.4 KB
1958	Special combinations of single-track and two-track replace double track on the Southern 960.9 KB
1947	Speed Indicators for High-Speed Turnouts 298.4 KB

Highland Park, IL 3

1954	Automatic Gates Increase Safety 3.2 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

Highlands, IL 1

1954	New Wayside and Cab Signaling 753.2 KB

Highlands, IN 1

1932	The Erie Installs Either-Direction Signaling 1.6 MB

highway ccrossings 1

1959	B&M takes up track and installs traffic control, gates and flashers 745.0 KB

highway crossing 3

1948	Gates at Three Crossings on Soo Line 1.8 MB
1957	Lehigh Valley combines interlockings 404.0 KB
1948	Special Gate Circuits in Houston 1.4 MB

highway crossing signals 3

1952	Gates at Eight Street Crossings on the Milwaukee Road 503.5 KB
1952	Illinois Central Installs Modern Protection at Crossings in Memphis, TN 1.3 MB
1911	Letters to the Editor: A Difference of Opinion 739.6 KB

highway crossings 184

1951	"Central" Increases Safety at Highway Crossings in Dayton 1.0 MB
1936	$500,000 Crossing Protection Program of Illinois 17.5 MB
1962	1962 outlook 3.0 MB
1949	40-Hour Week Means More Signaling 1.1 MB
1951	A History of Flashing-Light Crossing Signals- What They Are and Why 570.5 KB
1928	A Standard Aspect for Highway Crossing Signals 1.8 MB
1916	AC Signaling for Chicago Terminals 585.7 KB
1964	AFO can solve highway crossing problems 1.9 MB
1959	AFO circuits protect crossing 554.0 KB
1935	Alining Flashers 3.2 MB
1935	Auto Stop Installed on C&NW 7.2 MB
1956	Automatic Crossing Gates on CTA Are Interconnected with Street Traffic Lights 5.1 MB
1954	Automatic Gates Increase Safety 3.2 MB
1939	Automatic Gates on the Illinois Central 3.3 MB
1937	Automatic Gates on the Rock Island 7.3 MB
1935	Automatic Interlocking Involves Highway Crossing Signals 3.4 MB
1951	Automatic-Manual Control for Gates at Five Crossings 418.2 KB
1956	B&O Crossings 4.3 MB
1937	Barriers on the Michigan Central 7.0 MB
1935	Bells as Accessory Highway Crossing Protection 3.5 MB
1950	Bootleg Risers and Bonds 2.1 MB
1937	Burlington Protects Three Crossings 6.9 MB
1956	Centralia Has Protection of All Crossings 6.7 MB
1935	Circuit for Flashing Light Signals 3.5 MB
1935	Circuit for Flashing Light Signals 3.6 MB
1935	Circuits for Crossing Signals 1.5 MB
1939	Contact Pitting 1.6 MB
1958	CP consolidates interlockings 2.0 MB
1935	Crossing Bells at Flasher Signals 1.9 MB
1947	Crossing Gate 315.9 KB
1955	Crossing gate protection with indicators for train movements 432.4 KB
1949	Crossing Protection 1.1 MB
1955	Crossing protection for 16 streets 371.1 KB
1939	Crossing Protection for a Town 907.3 KB
1965	Crossing protection gets new look 490.1 KB
1947	Crossing Protection in Gary, Indiana 1.6 MB
1956	Crossing Protection In Industrial Area 3.1 MB
1936	Crossing Protection Includes Signals for Directing Trains 17.0 MB
1943	Crossing Protection on Milwaukee 5.7 MB
1937	Crossing Protection on the Monon 5.0 MB
1958	Crossing protection program saves 59% 553.4 KB
1950	Crossing Protection With Indicators for Train Movements 4.5 MB
1932	Crossing Signal History 941.6 KB
1943	Crossing Signal Standards 3.3 MB
1935	Crossing Signals on the C&NW at Oshkosh, Wis 3.4 MB
1935	Crossing Signals on the Southern 1.4 MB
1960	Crossings are safer after 10 years 454.4 KB
1947	CTC Down by the Ohio 2.7 MB
1955	CTC enables P&LE to remove fourth main track 515.3 KB
1955	CTC moves trains on grades 762.8 KB
1957	CTC on the SP has special devices 518.8 KB
1958	CTC saves time and money for the Louisville & Nashville 446.6 KB
1937	Cut-Out Control for Crossing Signals 3.0 MB
1951	Cut-Out Controls for Crossing Gates 488.0 KB
1959	D&H upgrades crossing protection 626.4 KB
1947	Developments in Signaling 498.7 KB
1929	Educate Highway Users to Observe Crossing Signals 615.5 KB
1915	Electric Interlocking at Aulon, Tennessee 882.6 KB
1957	Elevation causes signal changes 893.2 KB
1935	False Operation of Crossing Signals 955.2 KB
1935	False Operation of Crossing Signals 3.3 MB
1959	Fewer wayside observers makes automatic hazard detection necessary 1.1 MB
1936	Flashing Light Signal Failures 2.6 MB
1936	Flashing Lights At 20 Crossings In Kalamazoo 8.9 MB
1960	Gangs do signal maintenance 309.7 KB
1956	Gate Arm Stripes 1.3 MB
1964	Gate Control is by GCPs 1.4 MB
1950	Gate-Arm Stripe Colors 1.1 MB
1950	Gate-Arm Stripe Colors 3.4 MB
1956	Gates at 21 Crossings 6.6 MB
1943	Gates at Three Crossings on C&NW 3.4 MB
1956	Gates Installed at Five Crossings … Barriers at Four.pdf 5.0 MB
1940	Gates, Signals and Traffic Lights at a Wabash Crossing 6.8 MB
1965	GCPs can be used for various types of grade crossings 374.6 KB
1959	Grade crossing funds debated 242.0 KB
1950	Gulf, Mobile & Ohio Protects All Street Crossings in Springfield 2.6 MB
1936	Highway Crossing Protection 1.9 MB
1922	Highway Crossing Protection in Theory and Practice 5.5 MB
1947	Highway Crossing Protection Installed by Several Railroads in Gary, IndianaR 1.2 MB
1935	Highway Crossing Protection With Federal Funds 2.9 MB
1937	Highway Traffic Retarding Barriers on the Boston & Maine 8.0 MB
1935	Highway-Railroad Crossing Signals Installed at Federal Expense 1.2 MB
1955	How the Great Northern reduces accidents at highway crossings 425.6 KB
1957	How to make non-stop meet with CTC 576.9 KB
1963	ICC Reports on Signaling 959.4 KB
1960	ICC Reports RR safety 554.4 KB
1962	Identifying Emblems 326.9 KB
1937	Illumination as a Type of Crossing Protection 3.0 MB
1955	Improved protection at seven crossings 309.9 KB
1958	Improved signaling results from grade elimination 883.1 KB
1935	Improving Crossing Protection 1.2 MB
1936	Instructions for Crossing Protection in New York 1.8 MB
1939	Interconnection of Train Signals and Crossing Protection 1.1 MB
1956	Interlocking Relays 3.9 MB
1958	Interlocking saves time and money for the Belt Railway of Chicago 2.0 MB
1950	Is 20 Seconds Enough 1.1 MB
1946	Is 20 Seconds Enough? 382.9 KB
1956	Length of Train Selects Control of Crossing Gates on Illinois Central 4.6 MB
1935	Letter to the Editor- Crossing Protection Situation 2.7 MB
1935	Letter to the Editor: Highways vs. Railroads 1.7 MB
1943	Modernization of Automatic Signaling On the New York Central 9.8 MB
1937	Modernizing Crossing Protection With New Safety Features 2.9 MB
1957	More automation for signaling in 1957 1.2 MB
1951	More Signal Construction in 1950 1.0 MB
1955	Much is new in signaling for 1955 826.7 KB
1950	Neon Lighting For Crossing Gate Arms 3.1 MB
1949	New Interlocking in Louisville 5.3 MB
1960	News briefs. 1960-02 995.4 KB
1960	News briefs. 1960-03 1.9 MB
1960	News briefs. 1960-05 1.0 MB
1960	News briefs. 1960-08 603.8 KB
1961	News briefs. 1961-03 1.0 MB
1961	News briefs. 1961-05 1.1 MB
1962	News briefs. 1962-10 461.7 KB
1963	News briefs. 1963-02 1.3 MB
1964	News briefs. 1964-04 1.3 MB
1964	News briefs. 1964-10 768.6 KB
1965	News briefs. 1965-01 2.0 MB
1965	News briefs. 1965-04 1.5 MB
1965	News briefs. 1965-06 1.2 MB
1936	North Western Installs Automatic Gates 15.9 MB
1959	North Western installs automatic gates at nine crossings 699.9 KB
1938	Obligation for Crossing Protection 1.0 MB
1937	Observance of Crossing Signals 2.0 MB
1951	On the Baltimore & Ohio New Interlocking Speeds Trains 641.0 KB
1961	Overlay Circuit Reduces Joints 306.6 KB
1951	P&LE Rebuilds Interlocking 957.2 KB
1936	Phantom Indications 1.8 MB
1951	Portland Terminal Solves Crossing Protection Problem 676.8 KB
1935	Preventing Unnecessary Operation of Highway-Railroad Crossing Signals 4.3 MB
1941	Protection at 38 Street Crossings In and Near Rock Island, Ill 3.1 MB
1949	Protection at All Crossings In Battle Creek on the Grand Trunk Western 6.6 MB
1937	Push-Button Cut-Outs 989.3 KB
1961	Reading Improves 13 Crossings 739.0 KB
1936	Reading Installs Unique Crossing Protection 9.5 MB
1936	Reducing Current at Flashing Relay Contacts 2.2 MB
1908	Reporting System of the Illinois Central Railroad 1.3 MB
1927	Rotating Stop Signal for Highway Grade Crossings 1.0 MB
1958	RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB
1937	Rule for Crossing Protection 1.2 MB
1958	Santa Fe tests AF track circuits 1.6 MB
1936	Semaphore Type Crossing Gate Developed on the Alton 8.3 MB
1960	Signal construction steady in 1959 385.2 KB
1960	Signaling enters automation 630.6 KB
1959	Signaling moderate during '58 528.6 KB
1958	Signaling to cut expenses in '58 411.4 KB
1959	Signaling: 1960 225.2 KB
1950	Signals for Trains at Highway Crossings 5.9 MB
1936	Signals Installed at 26 Crossings in Dubuque, IA 13.8 MB
1951	South Shore Line Records Gate Operations 375.1 KB
1949	Special Controls for Crossing Protection 971.5 KB
1947	Special Controls for Crossing Signals 199.6 KB
1951	Special Protection Problems Solved With Gates and Flashers 1.5 MB
1963	Special Report: P&LE Signaling and Communications 3.9 MB
1939	Speeding Up Train Operation With Signaling 4.5 MB
1935	Standardization of Circuit Plans for Highway Crossing Signals 4.5 MB
1937	Stop, Look and Listen 1.6 MB
1951	Street and Railroad Crossing Protection Combined 529.9 KB
1936	Street Traffic Signals Controlled by Trains 5.1 MB
1935	Test Equipment for Highway Crossing Signals 1.1 MB
1956	The Crossing Accident Problem 986.5 KB
1935	The Federal Crossing Protection Program 1.6 MB
1937	The Rotating Stop Sign 1.1 MB
1929	The Year 1928 in Retrospect and the Outlook for 1929 1.5 MB
1963	Theory and Operation of Grade Crossing Predictor is Explained 840.9 KB
1937	Three Gate Crossings in a Row 4.2 MB
1939	Today's Crossing Protection Problem 1.8 MB
1957	Track circuit developments in Europe 234.8 KB
1961	Traffic Signal Control 277.2 KB
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
1950	Train Signals for Highway Crossings 1.4 MB
1937	Types of Crossing Signals Installed 1.1 MB
1932	Uniform Laws and Standards for Crossing Signals 518.8 KB
1928	Union Type HC5 Flasher with Vertical "Stop" Sign 495.9 KB
1927	Unique Highway Crossing Signals Solve Traffic Problem 1.4 MB
1955	Unusual control for crossing protection 722.1 KB
1940	Wabash Installs Gate and Signal Protection for All Crossings in Lafayette 4.9 MB
1937	Warning Time With Crossing Gates 1.3 MB
1958	What's the answer? Crossing circuits 254.4 KB
1958	What's the answer? Crossing indicators 509.4 KB
1960	What’s the answer? Automatic OS 354.1 KB
1935	Wig Wags Approved for PWA Projects 1.4 MB
1917	Wigwag signals on an Electric Line 239.2 KB

highway grade crossings 1

1947	Annual Review and Outlook 425.1 KB

highway safety 1

1935	Traffic Type Signals for Protection of Highway-Railroad Crossings 2.5 MB

highway traffic signals 1

1961	Traffic Signal Control 277.2 KB

Highwood, IL 1

1954	Automatic Gates Increase Safety 3.2 MB

Hilbert Jct., WI 1

1965	News briefs. 1965-09 381.7 KB

Hill, Reading, PA 1

1955	The Reading has compact control machine for consolidated interlocking 511.5 KB

Hinkle, OR 1

1963	News briefs. 1963-01 951.3 KB

Hinton, WV 3

1960	News briefs. 1960-05 1.0 MB
1963	News briefs. 1963-03 790.6 KB
1964	News briefs. 1964-07 833.0 KB

Hobart, IN 3

1935	Respacing Automatics on the Pennsylvania 1.8 MB
1935	Signaling for Higher Train Speeds 3.0 MB
1950	Signals for Trains at Highway Crossings 5.9 MB

Hoboken, NJ 5

1926	Directing Trains By Signals 1.9 MB
1959	Erie consolidates interlockings 440.6 KB
1925	Multiple Track Operation by Signal Indication 2.7 MB
1922	Signaling Meadows Line of DL&W 7.9 MB
1931	The Signaling of the Lackawanna Electrified Territory 5.9 MB

Hocking Valley 1

1928	Pennsylvania Installs an Interlocking Without Derails 2.3 MB

Hoffmans, NY 1

1944	New York Central Installs Coded Track Circuits 3.9 MB

Hold, NC 1

1963	News briefs. 1963-05 720.2 KB

hold-out signal 1

1951	On the Baltimore & Ohio New Interlocking Speeds Trains 641.0 KB

hold-out signals 1

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

holding signals 4

1949	Hold-Out Signals in CTC 1.0 MB
1958	Improved signaling results from grade elimination 883.1 KB
1949	New Interlocking in Louisville 5.3 MB
1958	One track does work of two on Maine Central 442.6 KB

Holgate, OH 1

1961	News briefs. 1961-04 1.5 MB

Holliday, KS 2

1932	Centralized Traffic Control Saves Time on the Santa Fe 2.6 MB
1959	Santa Fe CTCs double track line 2.2 MB

Holly, MI 1

1958	C&O Has Good Ideas in CTC 2.5 MB

Hollywood, FL 1

1963	News briefs. 1963-11 1.4 MB

Holyoke, MA 2

1963	News briefs. 1963-10 497.4 KB
1964	News briefs. 1964-02 981.5 KB

Home Creek, VA 1

1940	Centralized Traffic Control Solves Problem on the Norfolk & Western 7.5 MB

Home Valley, WA 1

1947	Signals and Slide Fences on the Spokane, Portland & Seattle 1.8 MB

Homer, IL 1

1941	Automatics Installed on the Wabash 4.0 MB

Homestead, OH 1

1950	CTC Installed on 128 Miles of NKP 12.1 MB

Homewood, IL 5

1963	News briefs. 1963-01 951.3 KB
1963	News briefs. 1963-02 1.3 MB
1963	News briefs. 1963-03 790.6 KB
1964	News briefs. 1964-02 981.5 KB
1965	News briefs. 1965-01 2.0 MB

Hoopeston, IL 1

1925	Division Train Control Installation on C&EI Approved by ICC 2.9 MB

Hoosac Tunnel, MA 3

1929	B&M Installs Either-Direction Signaling in Hoosac Tunnel 7.1 MB
1947	Hoosac Tunnel Interlocking and CTC 1.7 MB
1962	News briefs. 1962-02 1.4 MB

Hoosick Falls, NY 1

1947	Hoosac Tunnel Interlocking and CTC 1.7 MB

Hope, AR 1

1958	MP consolidates CTC machines 797.2 KB

Horace, IN 1

1929	Manual Block Signals Controlled Remotely on the Big Four 1.1 MB

Hornell, NY 4

1958	DL&W-Erie joint operation is ready to go 643.6 KB
1964	News briefs. 1964-09 879.4 KB
1965	News briefs. 1965-02 1.9 MB
1960	Signaling enters automation 630.6 KB

Hornepayne, Ontario 3

1959	News briefs. 1959-05 506.5 KB
1960	News briefs. 1960-01 1.1 MB
1959	Pushbutton console for CTC 785.3 KB

Hornpayne, Ontario 1

1953	Canadian National Adapts CTC to Traffic of 12 Trains Daily 7.5 MB

horns 2

1950	Interlocking Plant Horns 1.2 MB
1950	Interlocking Plant Horns 2.3 MB

hot box detectors 1

1960	Signal construction steady in 1959 385.2 KB

Hot Springs, AR 1

1929	Rock Island Uses Novel System for Operation by Signal Indication 1.7 MB

hotbox detectors 40

1962	1962 outlook 3.0 MB
1965	AAR and RLEA reply to RS&I exceptions 863.6 KB
1958	Carrier sends hot box indications to dispatchers' office 810.6 KB
1960	Erie installs its first hotbox detector 462.1 KB
1959	Fewer wayside observers makes automatic hazard detection necessary 1.1 MB
1960	From the field 954.3 KB
1959	Hot box detector sets signals 1.2 MB
1962	Hotbox Detectors Talk 2.0 MB
1959	L&N installs hot box detector 480.3 KB
1960	Long-distance hot box detection 861.0 KB
1964	Milwaukee installs its first microwave 277.4 KB
1960	New "Look" in hotbox detectors 359.9 KB
1959	News briefs. 1959-05 506.5 KB
1960	News briefs. 1960-07 845.4 KB
1960	News briefs. 1960-09 756.9 KB
1961	News briefs. 1961-04 1.5 MB
1962	News briefs. 1962-03 1.1 MB
1962	News briefs. 1962-07 494.2 KB
1962	News briefs. 1962-10 461.7 KB
1963	News briefs. 1963-01 951.3 KB
1963	News briefs. 1963-11 1.4 MB
1964	News briefs. 1964-05 1.0 MB
1964	News briefs. 1964-06 812.0 KB
1964	News briefs. 1964-07 833.0 KB
1964	News briefs. 1964-08 811.5 KB
1965	News briefs. 1965-01 2.0 MB
1965	News briefs. 1965-07 788.2 KB
1965	News briefs. 1965-10 1.1 MB
1959	Now: Instant hotbox location 829.3 KB
1964	NYC Moves CTC Point of Control 1.2 MB
1959	P&LE installs multiple track CTC 1.1 MB
1961	Railroad Will Pay For CTC Out Of Accrued Savings 842.9 KB
1958	RS&C 50th anniversary: Looking ahead 652.9 KB
1958	RS&C 50th anniversary: Railroad communications ... from Morse to microwave 3.3 MB
1960	Signaling enters automation 630.6 KB
1959	Signaling moderate during '58 528.6 KB
1958	Signaling to cut expenses in '58 411.4 KB
1960	Special report- Questions on hotbox detectors 290.9 KB
1961	Trainmen Read Hotbox Locator 1.1 MB
1960	What's the answer? Snow shields 424.6 KB

hotbox indicators 2

1959	L&N installs hot box detector 480.3 KB
1961	Trainmen Read Hotbox Locator 1.1 MB

Houston, TX 11

1962	Centralization – Dispatch Circuits Are Changing 1.3 MB
1954	CTC Improves Train Operation 3.3 MB
1955	Much is new in signaling for 1955 826.7 KB
1948	New Signaling In Texas on Missouri Pacific Lines 1.8 MB
1963	News briefs. 1963-08 1.2 MB
1963	News briefs. 1963-11 1.4 MB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB
1961	Should Sidings Have Circuits? 347.6 KB
1956	Small Flat Top Console for Controls And Separate Diagram for Indications 5.3 MB
1948	Special Gate Circuits in Houston 1.4 MB
1954	This Automatic Block Is Different 3.3 MB

Howard Avenue, Chicago, IL 1

1938	North Shore Installs Automatics 3.9 MB

Howe, W. K. 2

1911	The Absolute Permissive System 6.7 MB
1911	The Absolute Permissive System 881.6 KB

Howell, GA 2

1950	Big NX Interlocking at Atlanta 6.3 MB
1950	Double to Single Track with Remote Control 4.2 MB

Howell, KY 1

1947	CTC Down by the Ohio 2.7 MB

Howells, GA 1

1960	News briefs. 1960-06 1.2 MB

Howson, E. T. 1

1935	Safety of High Speed Trains 5.2 MB

Hoxie, AR 2

1929	Frisco Installs Semaphores with Color-Light Indication 665.1 KB
1962	News briefs. 1962-02 1.4 MB

Hoyt Lakes, MN 1

1962	DM&IR Consolidates CTC Control Miles 384.7 KB

Hudson & Manhattan 1

1940	Interlocking on the Hudson & Manhattan 6.8 MB

Hudson, PA 2

1960	News briefs. 1960-02 995.4 KB
1960	News briefs. 1960-06 1.2 MB

Huey P. Long bridge, New Orleans, LA 1

1937	Interlocking and Signaling For New Bridge at New Orleans 5.9 MB

Huichapan, Mexico 1

1962	News briefs. 1962-03 1.1 MB

Hull, England 2

1939	230 Routes In a Relay Interlocking 2.3 MB
1934	Highway Crossing Protection in England 1.3 MB

Hull, GA 1

1962	Hotbox Detectors Talk 2.0 MB

Hull, Québec 1

1915	Electric Train Staff Installation 3.3 MB

Hull, WV 3

1963	News briefs. 1963-10 497.4 KB
1964	News briefs. 1964-02 981.5 KB
1965	News briefs. 1965-01 2.0 MB

hump signals 1

1959	Britain's first automatic yard 312.0 KB

hump yard 3

1958	Automatic classification yard in service on the Burlington at Chicago 2.9 MB
1950	IC Rebuilds Classification Yard 6.9 MB
1964	News briefs. 1964-08 811.5 KB

hump yards 5

1959	Britain's first automatic yard 312.0 KB
1959	Communications is everywhere at P&LE's Gateway Yard in Youngstown, Ohio 2.1 MB
1960	Gangs do signal maintenance 309.7 KB
1960	News briefs. 1960-01 1.1 MB
1958	RS&C 50th anniversary: Signaling ... manual to automatic 2.0 MB

Hunters Point, Queens, NY 1

1958	Subway consolidates interlockings 2.2 MB

hunting for grounds 1

1965	What's the Answer? 1965-07 629.7 KB

Huntingdon Ave., Baltimore, MD 1

1955	News briefs. 1955-08 830.4 KB

Huntington, OR 2

1947	ICC Holds Signal Hearing 507.5 KB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB

Huntington, WV 5

1955	C&O Consolidates Interlockings 3.2 MB
1960	News briefs. 1960-02 995.4 KB
1961	News briefs. 1961-10 1.0 MB
1937	Ohio Flood Damages Signaling 9.7 MB
1955	Yard radio pays its way on the C&O 799.6 KB

Huntley, MT 4

1961	News briefs. 1961-12 978.0 KB
1963	News briefs. 1963-06 961.3 KB
1964	News briefs. 1964-02 981.5 KB
1964	News briefs. 1964-08 811.5 KB

Huntley, PA 2

1937	Ends of Double Track Controlled by CTC 12.4 MB
1925	Relieving Congestion by Signals 2.5 MB

hurricane 1

1947	Illinois Central Honors Radio “Hams” for Emergency Services 278.0 KB

Hurricane, AL 1

1965	News briefs. 1965-05 1.4 MB

Hurricane, WV 1

1921	A New Idea in Traffic Locking On the C&O 1.7 MB

Hutchinson, KS 1

1963	News briefs. 1963-08 1.2 MB

hydraulic pressure bond machine 1

1950	New Developments 16.9 MB

Railway Signaling: H

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