Railway Signaling | L

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.

La Grange, GA 1

1922	News of the Month. 1922-08 394.0 KB

La Griega, Mexico 1

1962	News briefs. 1962-03 1.1 MB

La Junta, CO 1

1947	Railroads Request Relief from the ICC Signal Order 365.7 KB

La Paz, Argentina 1

1960	News briefs. 1960-06 1.2 MB

La Porte, IA 1

1951	Automatic Block for Few Fast Trains 286.5 KB

La Porte, IN 1

1960	News briefs. 1960-09 756.9 KB

La Salle, NY 1

1963	News briefs. 1963-03 790.6 KB

La Salle-Congress interlocking, Chicago, IL 1

1952	Chicago's Newest Subway Has Automatic Block Signaling and Train Stop 1.1 MB

La Vergne, IL 1

1954	New Wayside and Cab Signaling 753.2 KB

laboratory 2

1959	Mobile lab evaluates class yards 830.6 KB
1949	Signal Research and Development 2.9 MB

Labrador City, Labrador 2

1962	Automatic Freight Train is Crewless 1.1 MB
1962	News briefs. 1962-09 838.3 KB

Laceyville, PA 1

1966	News briefs. 1966-01 1.4 MB

Lachine, Quebec 1

1922	News of the Month. 1922-07 360.7 KB

Lackawaxen, PA 1

1931	Erie Increases Track Capacity on Busy Section of Double Track 2.6 MB

Lafayette Jct., IN 1

1941	Monon Changes Approved 760.8 KB

Lafayette, IN 4

1931	Centralized Traffic Control Installed on Wabash 5.6 MB
1942	Chicago, Indianapolis & Louisiville Modernizes Automatic Signaling 3.9 MB
1941	Monon Changes Approved 760.8 KB
1940	Wabash Installs Gate and Signal Protection for All Crossings in Lafayette 4.9 MB

Lafayette, LA 1

1962	Centralization – Dispatch Circuits Are Changing 1.3 MB

Lagny, France 1

1935	Letter to the Editor: Use of Cab Signals 1.2 MB

Lake Bluff, IL 2

1954	Automatic Gates Increase Safety 3.2 MB
1926	North Shore Line Installs Two Electric Interlockers 2.1 MB

Lake Erie & Western 2

1920	Modern Telegraph Office at Indianapolis 3.1 MB
1922	News of the Month. 1922-06 516.2 KB

Lake Forest, IL 1

1954	Automatic Gates Increase Safety 3.2 MB

Lake Harbor Branch, FL 1

1964	News briefs. 1964-08 811.5 KB

Lake Hopatcong, NJ 1

1958	News briefs. 1958-01 1.8 MB

Lake Jeannine, Quebec 1

1960	News briefs. 1960-11 875.5 KB

Lake Park, FL 1

1965	News briefs. 1965-10 1.1 MB

Lake Park, MN 3

1961	News briefs. 1961-06 725.8 KB
1962	News briefs. 1962-02 1.4 MB
1963	News briefs. 1963-10 497.4 KB

Lake Shore & Michigan Southern 2

1912	New Single Track Signals on the Lake Shore 283.2 KB
1911	Railway Signal Association Convention: Committee I: Signaling Practice 3.8 MB

Lake Street, Chicago, IL 4

1919	A Peculiar Accident 251.7 KB
1911	Interlocking on the North Western Terminal 7.6 MB
1925	Maintenance on C&NW Terminals 12.5 MB
1911	Signaling and Interlocking on the North Western Terminal in Chicago 1.1 MB

Lake View, MS 1

1963	News briefs. 1963-11 1.4 MB

Lake Villa, IL 1

1964	News briefs. 1964-08 811.5 KB

Lake Worth, FL 1

1962	News briefs. 1962-09 838.3 KB

Lake, WI 3

1943	Centralized Traffic Control on the Milwaukee 2.8 MB
1963	News briefs. 1963-12 429.2 KB
1935	Safety of High Speed Trains 5.2 MB

Lakeland, FL 1

1960	News briefs. 1960-01 1.1 MB

Lakeside, UT 1

1913	New Signaling Across the Great Salt Lake 2.2 MB

Lakewood, OH 1

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

LaMar, IA 1

1947	ICC Signal Hearings 179.7 KB

Lamar, MI 2

1954	Loudspeakers and Interlocking Improve Yard Operation 4.7 MB
1949	Modern Signaling on a Division 6.6 MB

Lamar, MO 1

1962	News briefs. 1962-03 1.1 MB

Lamberts Point, VA 1

1922	News of the Month. 1922-08 394.0 KB

lamps 1

1927	A Reserve Filament Device to Prevent Light-Out Failures 529.8 KB

Lancashire, England 1

1921	A Complete Train Despatching System 1.7 MB

Lancaster & Yorkshire 1

1921	A Complete Train Despatching System 1.7 MB

Lancaster Yard, Ft. Worth, TX 1

1960	T&P moves CTC machine 78 miles 423.0 KB

Lancaster, PA 1

1929	Pennsylvania Installs Interlocking at Lancaster, PA 3.6 MB

Landers Yard, Chicago, IL 1

1958	Interlocking saves time and money for the Belt Railway of Chicago 2.0 MB

Lane, SC 2

1963	News briefs. 1963-01 951.3 KB
1963	News briefs. 1963-04 896.6 KB

Lanes Crossing, NJ 1

1931	Centralized Traffic Control Postpones Four-Tracking on Central of New Jersey 3.0 MB

Lansdale, PA 1

1963	News briefs. 1963-12 429.2 KB

Lansing, MI 1

1937	Signaling Eliminates Platform Maintenance 3.9 MB

lap sidings 2

1937	Signaling at Lap Sidings 1.1 MB
1937	Signaling at Lap Sidings 2.6 MB

Laramie, WY 1

1955	CTC and cab signaling on Union Pacific 789.5 KB

Larchmont, NY 1

1960	Railroads fit automation 186.8 KB

Laredo, MO 2

1945	Milwaukee Installs CTC On 51 Miles 6.5 MB
1945	The New Connections at Kansas City For Milwaukee and Rock Island 4.7 MB

Las Animas Jct., CO 1

1960	News briefs. 1960-03 1.9 MB

Las Vegas, NM 2

1960	News briefs. 1960-03 1.9 MB
1922	Signal Construction on the Santa Fe 797.6 KB

Las Vegas, NV 3

1944	Railroad Applications of Electronics 1.9 MB
1944	Track Circuits on Passing Tracks in CTC Territory 941.8 KB
1943	Union Pacific Installs CTC on 175 Miles of Single Track 13.2 MB

Lascelles, T. S. 2

1923	Automatics on Paris Grande Ceinture 5.0 MB
1922	Weissenbruch Three-Position Signal System as Used in Belgium 392.6 KB

Lathrop, CA 1

1962	News briefs. 1962-10 461.7 KB

Latimer, J. B. 1

1921	The Use of a Standard System of Nomenclature 337.6 KB

Latonia, KY 1

1963	News briefs. 1963-04 896.6 KB

Laurel, MT 4

1911	Automatic Signals on the Northern Pacific 6.3 MB
1960	News briefs. 1960-07 845.4 KB
1961	News briefs. 1961-06 725.8 KB
1961	News briefs. 1961-07 648.9 KB

Laurel, Reading, PA 1

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

law 1

1919	Legal Decisions on the Use of Torpedoes for Signaling Purposes 355.6 KB

Lawrenceburg Jct., IN 1

1962	News briefs. 1962-09 838.3 KB

Le Loup, KS 1

1922	Signal Construction on the Santa Fe 797.6 KB

Leavittsburg, OH 2

1936	Approach Electric Lighting On the Erie 2.7 MB
1942	Centralized Traffic Control on the Erie 464.3 KB

Lebanon Jct., KY 2

1946	CTC on 107 Miles of Single Track on the Louisville & Nashville 5.2 MB
1962	News briefs. 1962-10 461.7 KB

Lebanon Jt., KY 1

1947	Annual Review and Outlook 425.1 KB

Lebanon, IN 4

1960	News briefs. 1960-02 995.4 KB
1960	News briefs. 1960-03 1.9 MB
1960	News briefs. 1960-07 845.4 KB
1961	News briefs. 1961-07 648.9 KB

Lebanon, MO 1

1947	Frisco Moves CTC to One Office 481.1 KB

Lebanon, PA 1

1961	Reading Improves 13 Crossings 739.0 KB

Lebo, KS 1

1959	Santa Fe CTCs double track line 2.2 MB

Leeds, England 1

1938	Relay Interlocking at Leeds 4.3 MB

Leeds, MO 3

1924	Controlled Manual Block Signaling With Train Control 5.5 MB
1922	News of the Month. 1922-09 562.2 KB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB

Lees Cross Roads, PA 2

1950	CTC on the Reading 6.6 MB
1963	News briefs. 1963-12 429.2 KB

left-hand upper quadrant semaphores 1

1916	Reconstruction of New Haven Signals 315.5 KB

Lehi, Utah 1

1949	An Unusual Automatic Plant 4.5 MB

Lehigh & Hudson 1

1922	New Interlocking on the CRR of NJ 734.1 KB

Lehigh Valley 25

1950	Centralized Train Dispatching 1.4 MB
1962	Electric Switch Lamp Lighting Helps Reduce Operating Expense 661.7 KB
1936	Flood Damage to Signaling 5.0 MB
1943	Herbert S. Balliet obituary 614.8 KB
1922	ICC Proposes to Order Train Control on 49 Roads 376.4 KB
1915	Jersey City Terminal Interlocking 1.1 MB
1957	Lehigh Valley has check-in, check-out 755.3 KB
1925	Light Signals, Color, Position, or Color-Position 1.5 MB
1960	News briefs. 1960-03 1.9 MB
1962	News briefs. 1962-04 1.2 MB
1963	News briefs. 1963-01 951.3 KB
1963	News briefs. 1963-05 720.2 KB
1964	News briefs. 1964-09 879.4 KB
1964	News briefs. 1964-12 981.5 KB
1965	News briefs. 1965-07 788.3 KB
1965	News briefs. 1965-12 609.3 KB
1966	News briefs. 1966-01 1.4 MB
1922	News of the Month. 1922-11 361.5 KB
1921	Proposed Modification of Stop-and-Proceed Rule 1.4 MB
1936	Railroads Clean Up After Flood Waters 33.3 MB
1930	Signal Aspects for a Four Block System 2.8 MB
1950	Temporary Change of Signal Controls 2.2 MB
1925	The Train Control Situation 853.0 KB
1926	Train Control Progress in 1925 3.1 MB
1923	Train-Order Signals at Interlockers 3.6 MB

Lehighton, PA 1

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

Lehign Valley 2

1965	News briefs. 1965-01 2.0 MB
1947	Relay Interlocking on Lehigh Valley 805.7 KB

Lehing Valley 1

1957	Lehigh Valley combines interlockings 404.0 KB

Leicester, England 1

1958	Programmed interlocking control 337.6 KB

Leipsic, OH 2

1932	Centralized Traffic Control on the Baltimore & Ohio 4.4 MB
1932	Electric Interlocking Constructed by the Nickel Plate 1.4 MB

Lena, IL 1

1962	News briefs. 1962-02 1.4 MB

lengthening sidings 1

1964	What CTC Can Do For You 417.8 KB

Leningrad, Soviet Union 1

1964	Eight cities test automatic train operation 1.1 MB

Lennep, MT 1

1916	Signaling the Milwaukee's Electric Zone 624.8 KB

Lennoxville, Quebec 1

1927	Canadian Pacific Installs Remote Power Switch at Rebuilt Interlocker 2.2 MB

Lenox, IL 1

1923	News of the Month. 1923-10 1.9 MB

lenses 2

1936	Alining Signals on Curves 3.7 MB
1940	Signal Lens Cleaner 1.1 MB

Lethbridge, Alberta 1

1947	Canadian Pacific Installs Absolute Permissive Block 774.8 KB

letter 1

1956	The Crossing Accident Problem 986.5 KB

letter to the editor 2

1957	Letter to the editor: signal checking circuit used in the Netherlands 225.9 KB
1918	Mechanical Signaling 222.3 KB

Leverett Jct., IL 1

1947	False Clear Signal 1.0 MB

levermen 1

1945	The Leverman's Viewpoint 427.0 KB

Lewisport, KY 1

1947	CTC Down by the Ohio 2.7 MB

Lewistown, PA 3

1963	News briefs. 1963-10 497.4 KB
1922	News of the Month. 1922-04 613.8 KB
1924	Results of Train Control Test on Pennsylvania 3.1 MB

Lewisville, AR 1

1946	CTC on 121 Miles of the Cotton Belt 6.4 MB

Lexington Avenue Line, Brooklyn, NY 1

1925	Automatic Interlocking of a Double Track Junction on BMT Lines 1.8 MB

Lexington, IL 1

1923	Chicago & Alton Installation of Train Control 1.4 MB

Liberty Street interlocking, Binghamton, NY 1

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

Libertyville, IL 1

1954	Automatic Gates Increase Safety 3.2 MB

lift bridge 1

1936	New Electro-Pneumatic Plant On Pennsylvania at Newark 23.9 MB

light out relays 1

1947	Light-out Protection at Home Signals 233.7 KB

light signals 1

1926	Scientific Study of Light Signals 3.3 MB

light-out circuits 4

1935	Avoiding Light-Out Signal Failures 2.2 MB
1935	Avoiding Light-Out Signal Failures 1.2 MB
1950	New Rules, Standards and Instructions Issued by the Interstate Commerce Commission 7.9 MB
1950	Rules, Standards and Instructions 1.5 MB

lightning 1

1925	A Study of the Causes of Lightning 2.0 MB

lightweight trains 4

1935	An Improved Track Circuit for Light-Weight Equipment 2.4 MB
1956	How to Control Signals Safely Where Lightweight Trains are Operated 8.4 MB
1937	Track Shunting Problems 947.3 KB
1937	Track Shunting Problems 2.5 MB

Lima, OH 3

1954	CTC Moves Heavy Trains 4.1 MB
1925	PRR construction (Lima, et al): News of the Month (July 1925) 675.8 KB
1952	Train Time Saved By New Interlocking and Automatic Protection at 15 Street Crossings in Lima, Ohio 4.4 MB

Limedale, IN 1

1940	Pennsylvania Installs Centralized Traffic Control On 69 Miles of Line 13.1 MB

Limeville, KY 1

1936	C&O Remote Control 12.8 MB

Limon, CO 2

1946	Polarized Coded Track and Control Circuits On the Rock Island 3.4 MB
1946	Rock Island Develops a Unique System of Single-Track Station-to Station Automatic Block Based on Coded Track Circuits Without Line Wires 8.3 MB

Lincoln Park, NJ 1

1958	News briefs. 1958-01 1.8 MB

Lincoln, CA 2

1963	News briefs. 1963-02 1.3 MB
1963	News briefs. 1963-06 961.3 KB

Lincoln, NE 6

1955	CTC on single and double track 406.8 KB
1947	ICC Holds Signal Hearing 507.5 KB
1929	Interlocking Controlled Remotely 2.7 MB
1930	New Electric Interlocking on the Burlington Eliminates 160 Train Stops Per Day 2.8 MB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB
1935	Safety of High Speed Trains 5.2 MB

Lincoln, NJ 1

1937	Cut-Out Control for Crossing Signals 3.0 MB

Lindsay, VA 2

1928	C&O Signaling and Train Control Facilitate Operation 4.1 MB
1941	Centralized Traffic Control On the Chesapeake & Ohio 7.1 MB

line circuits 3

1935	Aerial Cable Versus Open Line 3.9 MB
1935	Pole Lines for Automatic Signaling 1.6 MB
1940	Southern Pacific Washes Insulators 1.5 MB

Linndale, OH 2

1930	Big Four Installs Simplified Interlocking With No Mechanical Locking 2.6 MB
1937	Route Control Interlocking – A New Signaling Development 2.9 MB

Linwood, NC 1

1963	News briefs. 1963-02 1.3 MB

Litchfield & Madison 1

1937	Automatic Signals on Litchfield & Madison 3.5 MB

Lithonia, GA 1

1947	Automatic Block With Spring Switches installed on the Georgia Railroad 851.4 KB

Little Rock, AR 6

1964	MP interlocking uses solid-state control system 410.9 KB
1961	News briefs. 1961-10 1.0 MB
1963	News briefs. 1963-08 1.2 MB
1964	News briefs. 1964-08 811.5 KB
1964	News briefs. 1964-09 879.4 KB
1965	News briefs. 1965-01 2.0 MB

Little ROck, AR 1

1960	News briefs. 1960-07 845.4 KB

Liverpool, IN 1

1925	PRR construction (Lima, et al): News of the Month (July 1925) 675.8 KB

Livingston, MT 5

1911	Automatic Signals on the Northern Pacific 6.3 MB
1957	More automation for signaling in 1957 1.2 MB
1961	News briefs. 1961-02 1.4 MB
1961	News briefs. 1961-06 725.8 KB
1961	News briefs. 1961-07 648.9 KB

LM Cabin, Columbus, OH 1

1925	Traffic Reversal on Double Track by Signal Indication 1.5 MB

local control system 1

1964	Kinks 300.7 KB

Lock Haven, PA 1

1947	CTC Saves Train Time on the Pennsylvania 1.5 MB

Lockbourne, OH 1

1950	Remote Control of Center Sidings On Busy Double-Track Line 3.6 MB

locking 1

1956	Release of Locking 3.7 MB

Lockport, IL 1

1936	Semaphore Type Crossing Gate Developed on the Alton 8.3 MB

locomotive radio 2

1955	Modern communications essential to efficient railroading 696.7 KB
1955	Yard radio pays its way on the C&O 799.6 KB

Locust St., Philadelphia, PA 1

1961	Railroad Will Pay For CTC Out Of Accrued Savings 842.9 KB

Lodge, IL 2

1959	News briefs. 1959-05 506.5 KB
1937	Signal Construction on the Wabash 12.2 MB

Lodgville, WV 1

1952	CTC Pays Its Way on B&O 733.2 KB

Logan Square, Chicago, IL 2

1960	News briefs. 1960-02 995.4 KB
1964	News briefs. 1964-08 811.5 KB

Logan, CA 1

1959	News briefs. 1959-05 506.5 KB

Logan, MO 1

1922	News of the Month. 1922-08 394.0 KB

Logansport, IN 3

1940	11,000-Ft. Coded Track Circuits 13.6 MB
1958	News briefs. 1958-01 1.8 MB
1961	News briefs. 1961-11 1.3 MB

Lohman, MT 1

1932	Automatic Interlocking Protects End of Double Track 2.7 MB

London & North Eastern 4

1939	230 Routes In a Relay Interlocking 2.3 MB
1934	Highway Crossing Protection in England 1.3 MB
1935	Mechanical Color Light Signals in England 1.3 MB
1938	Relay Interlocking at Leeds 4.3 MB

London & North Western 1

1932	Speed Signaling in England 1.9 MB

London & South Western 2

1922	News of the Month. 1922-02 323.2 KB
1922	News of the Month. 1922-07 360.7 KB

London Metropolitan 1

1931	Metropolitan Railway of London Resignaling with Modern Equipment 1.8 MB

London North Eastern 1

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

London Transport 3

1965	Japan, Sweden, England test ATO 6.3 MB
1964	News briefs. 1964-06 812.0 KB
1958	Programmed interlocking control 337.6 KB

London Underground 1

1931	British Report on Automatic Train Control 2.6 MB

London, England 12

1960	British install automatic yard near London 348.3 KB
1931	British Report on Automatic Train Control 2.6 MB
1926	Four-Aspect Color-Light Signals Installed on English Road 2.8 MB
1965	Japan, Sweden, England test ATO 6.3 MB
1931	Metropolitan Railway of London Resignaling with Modern Equipment 1.8 MB
1936	New Interlocking Machines Abroad 1.3 MB
1963	News briefs. 1963-05 720.2 KB
1964	News briefs. 1964-06 812.0 KB
1922	News of the Month. 1922-10 368.4 KB
1922	News of the Month. 1922-12 388.1 KB
1934	Paddington Power Signaling 1.9 MB
1958	Programmed interlocking control 337.6 KB

London, Ontario 1

1962	Toronto Railway Conference – Automatic Train Operation 448.4 KB

Long Island 17

1934	Electro-Pneumatic Interlocking on the Long Island 3.8 MB
1922	ICC Proposes to Order Train Control on 49 Roads 376.4 KB
1950	Increasing Use of Carrier 1.3 MB
1943	Long Island Replaces Interlocking Machine 3.4 MB
1950	Microwaves on Railroads 1.3 MB
1960	News briefs. 1960-03 1.9 MB
1960	News briefs. 1960-04 896.6 KB
1960	News briefs. 1960-05 1.0 MB
1962	News briefs. 1962-01 986.8 KB
1963	News briefs. 1963-02 1.3 MB
1963	News briefs. 1963-04 896.6 KB
1965	News briefs. 1965-08 749.4 KB
1922	News of the Month. 1922-06 516.2 KB
1922	Railroads Argue Against Automatic Stops at ICC Hearing 436.8 KB
1939	Signaling the Pennsylvania to New York World's Fair 4.2 MB
1952	Speed Control Installed on the Long Island 1.3 MB
1923	Train-Order Signals at Interlockers 3.6 MB

Long Lake, MN 3

1955	How the Great Northern reduces accidents at highway crossings 425.6 KB
1947	ICC Holds Signal Hearing 507.5 KB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB

long sidings 2

1957	How long sidings save train time 465.2 KB
1957	How to make non-stop meet with CTC 576.9 KB

Longview, AL 1

1962	News briefs. 1962-10 461.7 KB

Longview, TX 3

1948	New Signaling In Texas on Missouri Pacific Lines 1.8 MB
1949	Texas & Pacific New All-Relay Interlocking 4.3 MB
1944	Track Circuits on Passing Tracks in CTC Territory 941.8 KB

Loomis, CA 1

1911	The Staff System on the Southern Pacific 4.0 MB

Loop Tower, MN 1

1922	News of the Month. 1922-06 516.2 KB

Lordsburg, NM 1

1959	News briefs. 1959-05 506.5 KB

Loree, L. F. 1

1928	Obituary: Frank P. Patenall 627.0 KB

Los Angeles & Salt Lake 1

1922	Work in Signal Field Shows Gain Over 1920 784.5 KB

Los Angeles Union Passenger Terminal 2

1939	Mission Tower Interlocking at Los Angeles 9.2 MB
1939	New Interlocking at Los Angeles 9.6 MB

Los Angeles, CA 13

1934	An Electric Interlocking on the Southern Pacific 1.8 MB
1935	Automatic Interlockings of Two Junctions Involving Spring Switches 8.9 MB
1947	ICC Holds Signal Hearing 507.5 KB
1939	Mission Tower Interlocking at Los Angeles 9.2 MB
1939	New Interlocking at Los Angeles 9.6 MB
1960	News briefs. 1960-08 603.8 KB
1922	News of the Month. 1922-09 562.2 KB
1943	Pacific Electric Installs a Large All-Relay Interlocking 5.3 MB
1928	Pacific Electric Protects Subway Traffic With Signals and Train Stops 2.4 MB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB
1935	Safety of High Speed Trains 5.2 MB
1944	Santa Fe Installs CTC on 115.6 Miles Los Angeles to San Diego 7.2 MB
1936	Street Traffic Signals Controlled by Trains 5.1 MB

loss of shunt 3

1961	Loss of Shunt at Automatic Interlockings 195.5 KB
1958	RS&C 50th anniversary: Looking ahead 652.9 KB
1965	What's the Answer? 1965-07 629.7 KB

Lost Nation, IA 1

1951	Single Track with CTC Replaces Double Track on Milwaukee 586.0 KB

Louisiana 1

1910	Interlocking Laws in the United States and Canada 821.1 KB

Louisiana & Arkansas 3

1936	New Electric Interlocking and Signaling at the Mississippi River Bridge at New Orleans 7.9 MB
1947	Railroads Request Relief from the ICC Signal Order 365.7 KB
1947	Territories Involved in the ICC Signaling Order 388.2 KB

Louisiana, MO 3

1923	CB&Q Installs New Light Signals 4.1 MB
1922	News of the Month. 1922-07 360.7 KB
1922	News of the Month. 1922-10 368.4 KB

Louisille, NE 1

1955	CTC on single and double track 406.8 KB

Louisville & Nashville 88

1943	A Review of 1942 2.9 MB
1911	A Summary of Signaling Practice 3.6 MB
1947	Annual Review and Outlook 425.1 KB
1937	Approach Indications to Train Order Signals 4.2 MB
1933	Are Switch Lamps Needed? 506.3 KB
1933	Automatic Operation 963.8 KB
1950	Bootleg Risers and Bonds 2.1 MB
1935	Checking Rail Ends on Drawbridges 2.5 MB
1927	Control of Stop Indication in Approach-Lighted Territory 972.5 KB
1932	Crossing Problem 2.6 MB
1947	CTC Down by the Ohio 2.7 MB
1954	CTC into Service 2.5 MB
1946	CTC on 107 Miles of Single Track on the Louisville & Nashville 5.2 MB
1958	CTC saves time and money for the Louisville & Nashville 446.6 KB
1931	Derails in Passing Sidings 1.1 MB
1915	Electric Interlocking at Aulon, Tennessee 882.6 KB
1936	Electric Lighting of Semaphores 867.6 KB
1939	Electric Lights for Semaphores 1.9 MB
1962	Electric Switch Lamp Lighting Helps Reduce Operating Expense 661.7 KB
1928	Emergency Release Circuits 2.4 MB
1944	Emergency Release for Switch Lock 1.3 MB
1950	Gate-Arm Stripe Colors 3.4 MB
1957	Kinks. Testing "KP" relays 191.2 KB
1950	L&N Extends CTC on "EK" 10.4 MB
1944	L&N Installs CTC On an Engine District 9.0 MB
1959	L&N installs hot box detector 480.3 KB
1916	Method for Checking Mechanical Locking 322.8 KB
1957	More automation for signaling in 1957 1.2 MB
1951	More Signal Construction in 1950 1.0 MB
1954	New Orleans Passenger Terminal 4.7 MB
1960	News briefs. 1960-03 1.9 MB
1960	News briefs. 1960-07 845.4 KB
1960	News briefs. 1960-09 756.9 KB
1960	News briefs. 1960-11 875.5 KB
1961	News briefs. 1961-01 761.9 KB
1962	News briefs. 1962-04 1.2 MB
1962	News briefs. 1962-05 826.8 KB
1962	News briefs. 1962-07 494.2 KB
1962	News briefs. 1962-10 461.7 KB
1963	News briefs. 1963-02 1.3 MB
1963	News briefs. 1963-03 790.6 KB
1963	News briefs. 1963-04 896.6 KB
1963	News briefs. 1963-05 720.2 KB
1964	News briefs. 1964-02 992.4 KB
1964	News briefs. 1964-08 811.5 KB
1965	News briefs. 1965-01 2.0 MB
1965	News briefs. 1965-02 1.9 MB
1965	News briefs. 1965-05 1.4 MB
1965	News briefs. 1965-07 788.3 KB
1965	News briefs. 1965-08 749.4 KB
1965	News briefs. 1965-09 381.8 KB
1965	News briefs. 1965-10 1.1 MB
1922	News of the Month. 1922-06 516.2 KB
1922	News of the Month. 1922-10 368.4 KB
1941	Non-Stop Permissive Signals 1.4 MB
1937	Ohio Flood Damages Signaling 9.7 MB
1939	Operation by Signal Indication on Single Track 846.7 KB
1931	Preparation of Signal Circuit Plans 2.0 MB
1943	Progress in the Use of Coded Track Circuits 1.6 MB
1926	Proper Lamps for Semaphore Night Lighting 1.4 MB
1921	Proposed Modification of Stop-and-Proceed Rule 1.4 MB
1959	Pushbutton console for CTC 785.3 KB
1929	Rear-End Flagging 745.4 KB
1936	Reducing Current at Flashing Relay Contacts 2.2 MB
1935	Removal of Switch Indicators 2.3 MB
1937	Report of Committee X – Signaling Practice 2.9 MB
1926	Semaphore or Light Signals? 1.4 MB
1930	Should Signal Clear? 1.2 MB
1928	Signal and Train Control Hearing Ends 2.0 MB
1960	Signal construction steady in 1959 385.2 KB
1922	Signal Indications Replace Train Orders 1.8 MB
1935	Signaling at Spring Switches 2.6 MB
1959	Signaling moderate during '58 528.6 KB
1961	Survey Tells How Railroads Use Hotbox Detectors 1.8 MB
1947	Territories Involved in the ICC Signaling Order 388.2 KB
1925	The Train Control Situation 853.0 KB
1926	Train Control Progress in 1925 3.1 MB
1920	Train Operation by Means of Signal Indications 2.4 MB
1935	Trap Circuits at Railroad Crossings 4.6 MB
1934	Use of Marker Lamps 516.1 KB
1956	Walkie-Talkies 1.5 MB
1937	Warning Time With Crossing Gates 1.3 MB
1964	What CTC Can Do For You 417.8 KB
1928	What Is to Be Gained by Train Stop or Train Control? 463.8 KB
1930	What Protection at Drawbridges? 3.5 MB
1920	What Scheme of Signaling is Most Desirable? 6.8 MB
1965	What's the Answer? 1965-07 629.7 KB
1960	What's the answer? Snow shields 424.6 KB

Louisville, KY 7

1947	CTC Down by the Ohio 2.7 MB
1937	Illumination as a Type of Crossing Protection 3.0 MB
1929	Manual Block Signals Controlled Remotely on the Big Four 1.1 MB
1949	New Interlocking in Louisville 5.3 MB
1965	News briefs. 1965-12 609.3 KB
1937	Ohio Flood Damages Signaling 9.7 MB
1941	Pennsylvania Installs CTC at Louisville, KY 4.9 MB

Lousiville & Nashville 1

1922	ICC Proposes to Order Train Control on 49 Roads 376.4 KB

Loveland, OH 2

1955	News briefs. 1955-08 830.4 KB
1962	News briefs. 1962-04 1.2 MB

Lovell, PA 1

1962	News briefs. 1962-03 1.1 MB

Lowell Jct., MA 1

1965	News briefs. 1965-01 2.0 MB

Lowell, MA 1

1965	News briefs. 1965-01 2.0 MB

Lower Hutt, New Zealand 1

1922	Single Track Signaling in Australia 527.7 KB

lower quadrant semaphores 1

1935	Obsolescence in Signaling 3.4 MB

Loyall, KY 1

1958	CTC saves time and money for the Louisville & Nashville 446.6 KB

Lubbock Jct., TX 1

1960	News briefs. 1960-10 1.8 MB

Lubbock, TX 1

1960	News briefs. 1960-03 1.9 MB

Lucas, LA 2

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

Lucasville, OH 1

1950	Neon Lighting For Crossing Gate Arms 3.1 MB

Lucin cut-off 1

1913	New Signaling Across the Great Salt Lake 2.2 MB

Lucin, UT 2

1913	New Signaling Across the Great Salt Lake 2.2 MB
1947	Southern Pacific Installs CTC 990.2 KB

Ludington, MI 1

1955	CTC Saves Time for Freights On 135 Miles of Single Track 4.0 MB

Ludlow, KY 1

1954	Unique Combinations of Single-Track and Two-Track Developed on the Southern 3.8 MB

Luke, VA 1

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

Lukey, Decatur, IL 1

1954	Wabash Yard Moves Expedited 1.2 MB

Lumbrook, DE 1

1922	News of the Month. 1922-09 562.2 KB

lunar white 14

1949	A Century of Signal Glass Developments 4.2 MB
1959	Britain's first automatic yard 312.0 KB
1956	Burlington Has Compact Control Machine for Consolidation of 14 Interlockings 11.3 MB
1959	Burlington installs modified CTC 1.0 MB
1955	Crossing gate protection with indicators for train movements 432.4 KB
1957	How long sidings save train time 465.2 KB
1935	Letter to the Editor- Comment on Multiple Aspects 1.5 MB
1950	Lunar White 419.3 KB
1935	Multiple Aspect Signaling 3.3 MB
1959	Pushbutton console for CTC 785.3 KB
1915	Red as a Danger Indication 283.5 KB
1937	Seaboard Utilizes Spring Switches 8.4 MB
1950	Spring Switch Signaling 2.5 MB
1949	Texas & Pacific New All-Relay Interlocking 4.3 MB

Lurgan, PA 1

1950	CTC on the Reading 6.6 MB

Lydale Jct., MN 1

1947	Automatic Signaling With Spring Switches Installed on the Great Northern 734.1 KB

Lyle, WA 1

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

Lynch, Argentina 1

1960	News briefs. 1960-06 1.2 MB

Lynch, WY 1

1955	CTC and cab signaling on Union Pacific 789.5 KB

Lynchburg, VA 3

1941	CTC Installed on Norfolk & Western 5.1 MB
1950	Neon Lighting For Crossing Gate Arms 3.1 MB
1965	News briefs. 1965-01 2.0 MB

Lyndale Jct., MN 1

1960	News briefs. 1960-09 756.9 KB

Lynn, NM 1

1960	News briefs. 1960-03 1.9 MB

Lyons, WA 2

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

Lytle, WI 2

1922	News of the Month. 1922-07 360.7 KB
1922	News of the Month. 1922-10 368.4 KB

Railway Signaling: L