Railway Signaling: H

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"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
haf-interlocking 1
1915 A Half-Interlocking Plant on the Canadian Northern   1.6 MB
Hagerstown, MD 2
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
Haleyville, AL 1
1930 Illinois Central Installs Color Light Signals on 80 Miles   1.6 MB
Hall disc signals 2
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
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 7
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
1936 Wilmer W. Salmon, President of General Railway Signal Company, Dies   2.8 MB
Hamburg St., Baltimore, MD 1
1956 Interlocking Consolidation: Three Into One in Baltimore   6.8 MB
Hamilton Jct., Ontario 1
1927 Mechanical Interlocker on the Canadian Pacific   1.0 MB
Hamlet, NC 2
1947 Annual Review and Outlook   425.1 KB
1937 Seaboard Utilizes Spring Switches   8.4 MB
Hammond, IN 8
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
1932 The Erie Installs Either-Direction Signaling   1.6 MB
1929 Trap Circuit for Drawbridge   980.8 KB
Hancock, WV 1
1944 Remote Control Project Saves Train Time on the Baltimore & Ohio   3.5 MB
Hannibal, MO 3
1950 Audible Warning Sounded When Dragging Equipment Detectors Operate   4.2 MB
1923 CB&Q Installs New Light Signals   4.1 MB
1945 Manual Block-Remote Control Developed On the Wabash   5.7 MB
Harbor Creek, PA 2
1955 New York Central’s CTC – It’s Four Tracks to Two   4.1 MB
1957 Where Two Tracks Do the Work of Four   3.2 MB
Harlowton, MT 1
1917 Light Signals On CM&StP   781.9 KB
Harold, NY 1
1952 Speed Control Installed on the Long Island   1.3 MB
Harrisburg, PA 6
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
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 1
1935 Call-on Signal Involved In Accident   1.1 MB
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
Harvey, IL 1
1916 New Automatic Signals on Grand Trunk   991.7 KB
Hastings, MN 2
1934 Milwaukee to Use Cab Signals   699.1 KB
1926 Train Control Progress in 1925   3.1 MB
Hastings, NE 1
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
Havre de Grace, MD 1
1937 Pennsylvania CTC Installation   7.0 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   7.1 MB
1940 Interlockings Installed at Two Crossings   6.5 MB
HD Jct., MO 1
1931 Missouri Pacific Installs Centralized Traffic Control on 32 Miles of Double Track   2.7 MB
Helper, UT 3
1937 CTC On the Denver & Rio Grande Western   8.0 MB
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 3
1936 Electric Lighting of Semaphores   867.6 KB
1939 Electric Lights for Semaphores   1.9 MB
1920 Train Operation by Means of Signal Indications   2.4 MB
Herington, KS 5
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
1949 Signaling Adapted to Traffic On the Rock Island   5.2 MB
1931 Twelve-Track Yard Indicator on the Rock Island   888.5 KB
high water detectors 1
1939 Special Aspects for Detectors   937.0 KB
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 1
1950 High Speed Turnout Signaling   2.3 MB
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 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 102
1936 $500,000 Crossing Protection Program of Illinois   17.5 MB
1949 40-Hour Week Means More Signaling   1.1 MB
1928 A Standard Aspect for Highway Crossing Signals   1.8 MB
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
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
1935 Crossing Bells at Flasher Signals   1.9 MB
1949 Crossing Protection   1.1 MB
1939 Crossing Protection for a Town   907.3 KB
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
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
1937 Cut-Out Control for Crossing Signals   3.0 MB
1947 Developments in Signaling   498.7 KB
1929 Educate Highway Users to Observe Crossing Signals   615.5 KB
1935 False Operation of Crossing Signals   955.2 KB
1935 False Operation of Crossing Signals   3.3 MB
1936 Flashing Light Signal Failures   2.6 MB
1936 Flashing Lights At 20 Crossings In Kalamazoo   8.9 MB
1956 Gate Arm Stripes   1.3 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
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
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
1937 Illumination as a Type of Crossing Protection   3.0 MB
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
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
1950 Neon Lighting For Crossing Gate Arms   3.1 MB
1949 New Interlocking in Louisville   5.3 MB
1936 North Western Installs Automatic Gates   15.9 MB
1938 Obligation for Crossing Protection   1.0 MB
1937 Observance of Crossing Signals   2.0 MB
1936 Phantom Indications   1.8 MB
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
1936 Reading Installs Unique Crossing Protection   9.5 MB
1936 Reducing Current at Flashing Relay Contacts   2.2 MB
1927 Rotating Stop Signal for Highway Grade Crossings   1.0 MB
1937 Rule for Crossing Protection   1.2 MB
1936 Semaphore Type Crossing Gate Developed on the Alton   8.3 MB
1950 Signals for Trains at Highway Crossings   5.9 MB
1936 Signals Installed at 26 Crossings in Dubuque, IA   13.8 MB
1949 Special Controls for Crossing Protection   971.5 KB
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
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
1937 Three Gate Crossings in a Row   4.2 MB
1939 Today's Crossing Protection Problem   1.8 MB
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
1940 Wabash Installs Gate and Signal Protection for All Crossings in Lafayette   4.9 MB
1937 Warning Time With Crossing Gates   1.3 MB
1935 Wig Wags Approved for PWA Projects   1.4 MB
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
Highwood, IL 1
1954 Automatic Gates Increase Safety   3.2 MB
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 4
1926 Directing Trains By Signals   1.9 MB
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
holding signals 2
1949 Hold-Out Signals in CTC   1.0 MB
1949 New Interlocking in Louisville   5.3 MB
Holliday, KS 1
1932 Centralized Traffic Control Saves Time on the Santa Fe   2.6 MB
Holly, MI 1
1958 C&O Has Good Ideas in CTC   2.5 MB
Home Creek, VA 1
1940 Centralized Traffic Control Solves Problem on the Norfolk & Western   7.5 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
Hoopeston, IL 1
1925 Division Train Control Installation on C&EI Approved by ICC   2.9 MB
Hoosac Tunnel 1
1947 Hoosac Tunnel Interlocking and CTC   1.7 MB
Hoosac Tunnel, MA 1
1929 B&M Installs Either-Direction Signaling in Hoosac Tunnel   7.1 MB
Hoosick Falls, NY 1
1947 Hoosac Tunnel Interlocking and CTC   1.7 MB
Horace, IN 1
1929 Manual Block Signals Controlled Remotely on the Big Four   1.1 MB
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 Springs, AR 1
1929 Rock Island Uses Novel System for Operation by Signal Indication   1.7 MB
Houston, TX 4
1954 CTC Improves Train Operation   3.3 MB
1947 Railroads Request Relief from the ICC Signal Order   465.0 KB
1956 Small Flat Top Console for Controls And Separate Diagram for Indications   5.3 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
Howson, E. T. 1
1935 Safety of High Speed Trains   5.2 MB
Hoxie, AR 1
1929 Frisco Installs Semaphores with Color-Light Indication   665.1 KB
Hudson & Manhattan 1
1940 Interlocking on the Hudson & Manhattan   6.8 MB
Huey P. Long bridge, New Orleans, LA 1
1937 Interlocking and Signaling For New Bridge at New Orleans   5.9 MB
Hull, England 2
1939 230 Routes In a Relay Interlocking   2.3 MB
1934 Highway Crossing Protection in England   1.3 MB
Hull, Québec 1
1915 Electric Train Staff Installation   3.3 MB
hump yard 1
1950 IC Rebuilds Classification Yard   6.9 MB
Huntington, OR 2
1947 ICC Holds Signal Hearing   507.5 KB
1947 Railroads Request Relief from the ICC Signal Order   465.0 KB
Huntington, WV 2
1955 C&O Consolidates Interlockings   3.2 MB
1937 Ohio Flood Damages Signaling   9.7 MB
Huntley, PA 2
1937 Ends of Double Track Controlled by CTC   12.4 MB
1925 Relieving Congestion by Signals   2.5 MB
Hurricane, WV 1
1921 A New Idea in Traffic Locking On the C&O   1.7 MB
hydraulic pressure bond machine 1
1950 New Developments   16.9 MB

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