| US Railroad Name Index | ||
| AC&R | Aberdeen & Rockfish | |
| A,C&Y | Akron, Canton and Youngstown | |
| AL | Alaska | |
| ARR | Alaska Railroad | |
| AC | Algoma Central | |
| AR | Allegheny Railroad | |
| ACE | Altamont Commuter Express | |
| ALT | Alton | |
| AMT | Amtrak | |
| AA | Ann Arbor | |
| APR | Apache Railway | |
| AN | Apalachicola Northern | |
| AR&M | Arkansas & Missouri | |
| AOR | Arkansas-Oklahoma Railroad | |
| AT&SF | Atchison, Topeka and Santa Fe | |
| AT&SAB | Atlanta & St. Andrews Bay | |
| AT&WP | Atlanta & West Point | |
| A&P | Atlantic & Pacific | |
| ACL&W | Atlantic & Western | |
| ACL | Atlantic Coast Line | |
| B&L | Baltimore & Lehigh | |
| B&O | Baltimore and Ohio | |
| B&AR | Bangor and Aroostok | |
| B&H | Bath & Hammondsport | |
| BL | Bay Line | |
| BCR | BC Rail | |
| BRoC | Belt Railway of Chicago | |
| B&LE | Bessemer and Lake Erie | |
| BeS | Bethlehem Steel | |
| BHP | BHP | |
| BS | Birmingham Southern | |
| BNSF | BNSF | |
| BC | Boise Cascade | |
| B&A | Boston & Albany | |
| B&M | Boston and Maine | |
| BU | Burlington | |
| BN | Burlington Northern | |
| CaT | Cal Train | |
| CW | California Western | |
| CZ | California Zephyr | |
| C&I | Cambria & Indiana | |
| CAR | Canadian American Railroad | |
| CF | Canadian Forest | |
| CN | Canadian National | |
| CP | Canadian Pacific | |
| CPR | Canadian Pacific Railroad | |
| CA&NW | Carolina & Northwestern | |
| CSR | Cass Scenic Railroad | |
| CEFX | CEFX | |
| CEFXL | CEFX Lease | |
| CKS | Central Kansas Railway | |
| CG | Central of Georgia | |
| CoI | Central of Indiana | |
| CNJ | Central of New Jersey | |
| CePa | Central Pacific | |
| CRRP | Central Railroad of Pennsylvania | |
| CRRNJ | Central RR of New Jersey | |
| CTS | Central Transit System | |
| CV | Central Vermont | |
| C&C | Chattooga & Chickamauga | |
| C&D | Cheespeake & Delaware | |
| C&O | Chesapeake and Ohio | |
| C | Chessie | |
| CS | Chessie System | |
| C&A | Chicago & Alton | |
| C&EI | Chicago & Eastern Illinois | |
| C&GW | Chicago & Great Western | |
| C&IM | Chicago and Illinois Midland | |
| C&NW | Chicago and North Western | |
| CB&Q | Chicago Burlington & Quincy | |
| CHTT | Chicago Heights Terminal Transfer | |
| CRTA | Chicago RTA | |
| CCC&StL | Chicago, Cleveland, Cincinnati & St. Louis | |
| C,RI&P | Chicago, Rock Island and Peoria | |
| CHR | Christmas | |
| COP | City of Prineville | |
| CLI | Climax | |
| CL | Clinchfield | |
| COA | Coaster | |
| C&S | Colorado & Southern | |
| CMC | Colorado Mining Co. | |
| CGRN | Columbus & Greenville | |
| CONR | Conrail | |
| CBL | Coos Bay Lumber | |
| CB | Cotton Belt | |
| CO&E | Crab Orchard & Egyptian | |
| CSX | CSX | |
| D&I | Dakota & Iowa | |
| DM&E | Dakota, Minnesota & Eastern | |
| D-TRE | Dallas - Trinity Railway Express | |
| DC | Deadwood Central | |
| D&H | Delaware and Hudson | |
| De-La | Delaware-Lackawanna | |
| DS | Delta Southern | |
| DV&S | Delta Valley & Southern | |
| DEM | Demonstrator | |
| D&RG | Denver and Rio Grande | |
| D&RGW | Denver and Rio Grande Western | |
| DSP&P | Denver South Park & Pacific | |
| DLWR | Depew, Lancaster, & Western | |
| D&M | Detroit & Mackinac | |
| D&TS | Detroit and Toledo Shore Line | |
| DT&I | Detroit, Toledo and Ironton | |
| DSR | Dismal Swamp Railroad | |
| DM&IR | Duluth Missabe & Iron Range | |
| DSS&A | Duluth South Shore & Atlantic | |
| DW&P | Duluth, Winnepeg & Pacific | |
| D&S | Durango Southern | |
| EBT | East Broad Top | |
| EEC | East Erie Commercial | |
| EMD | Electro- Motive Division | |
| EJ&E | Elgin, Joliet and Eastern | |
| ETL | Ely Thomas Lumber | |
| Erie | Erie | |
| EM | Erie Mining | |
| Erie-Lack | Erie-Lackawanna | |
| E&LS | Escanaba & Lake Superior | |
| ET&WNC | ET & WNC Company | |
| E&P | Eureka & Palisade | |
| FAM | Family Lines System | |
| FNM | Ferro Nationale Mexico | |
| FDP | Ferrocarril Del Pacifico | |
| FLR | Finger Lakes Railway | |
| F&CC | Florence & Cripple Creek | |
| FC | Florida Central | |
| FEC | Florida East Coast | |
| FMID | Florida Midland | |
| FTR | Florida Tri-Rail | |
| FW&D | Forth Worth & Denver | |
| FWRR | Forth Worth RR | |
| F | Frisco | |
| FGE | Fruit Growers Express | |
| GATX | GATX | |
| GED | GE Demo | |
| GECX | GECX | |
| GF | Georgia Florida | |
| GP | Georgia Pacific | |
| GA | Georgia Railroad | |
| GOT | GO Transit | |
| GW | Golden Western | |
| GTW | Grand Trunk Western | |
| GN | Great Northern | |
| GB&W | Green Bay & Western | |
| G&ER | Greenbrier & Elk River | |
| GFRR | Grizzly Flats Railroad | |
| G | Guildorf | |
| GM&O | Gulf, Mobile and Ohio | |
| HL | Helm Leasing | |
| HP | Helm Pacific | |
| HLL | Hickory Lake Lumber | |
| H&W | Hollywood & Western | |
| HN | Hutchinson Northern | |
| ICG | Illiinois Central Gulf | |
| IC | Illinois Central | |
| IliN | Illinois Northern | |
| IT | Illinois Terminal | |
| I&OR | Indiana & Ohio Railroad | |
| IHB | Indiana Harbor Belt | |
| IRR | Indiana Railroad | |
| IP&C | Indianapolis, Peru & Chicago | |
| I | Interstate | |
| II | Iowa Interstate | |
| IN | Iowa Northern | |
| IR | Ironton | |
| JC | Jersey Central | |
| JD | John Deere | |
| KC | Kansas Central | |
| KCS | Kansas City Southern | |
| KCT | Kansas City Terminal | |
| Lack | Lackawanna | |
| LB | Ladybug | |
| LEF&C | Lake Erie Franklin & Clarion | |
| LS&I | Lake Superior & Ishpeming | |
| L&HR | Lehigh & Hudson River | |
| L&NE | Lehigh & New England | |
| LV | Lehigh Valley | |
| LP | Light Pacific | |
| LRL | Little River Logging Co. | |
| LI | Long Island | |
| L | Loram | |
| L&N | Louisville and Nashville | |
| L,NA&C | Louisville, New Albany and Corydon | |
| MAE | Maersk | |
| MEC | Maine Central | |
| MoW | Maintenance of Way | |
| MANUF | Manufacturers Railway | |
| M&D | Maryland & Delaware | |
| MA&PA | Maryland and Pennsylvania | |
| MASS | Mass Central | |
| MBTA | Massachusetts Bay Transit Authority | |
| MCR | McCloud River | |
| MRLC | Meadow River Lumber Company | |
| MN | Metro North | |
| ML | Metrolink | |
| MIDS | MIDSOUTH | |
| MQ&M | Midwest Quarry & Mining | |
| MILW | Milwaukee Road | |
| M&StL | Minneapolis and St Louis | |
| MN&S | Minneapolis Northfield and Southern | |
| MC | Minnesota Commercial | |
| MD&W | Minnesota Duluth & West. | |
| M,D&W | Minnesota, Dakota and Western | |
| MiCe | Mississippi Central | |
| MP | Missouri Pacific | |
| MKT | Missouri, Kansas, Texas | |
| MON | Monon | |
| MRL | Montana Rail Link | |
| M&E | Morristown & Errie | |
| NdeM | Nacionales de Mexico Railway | |
| NVWT | Napa Valley Wine Train | |
| NC&StL | Nashville, Chattanooga and St. Louis | |
| NH | New Haven | |
| NJT | New Jersey Transit | |
| NMRR | New Mexiko Rail Runner | |
| NOPB | New Orleans Public Belt | |
| NYC | New York Central | |
| NYC&HR | New York Central & Hudson River | |
| NYNH&H | New York, New Haven and Hartford | |
| NYO&W | New York, Ontario & Western | |
| NYS&W | New York, Susquehanna & Western | |
| NYC&StL | Nickel Plate Road | |
| NKP | Nickel Plate Road | |
| NIHX | NIHX | |
| NS | Norfolk and Southern | |
| N&W | Norfolk and Western | |
| NCT | North Central Texas | |
| NSR | North Shore Railroad | |
| NWH | North West Hardwoods | |
| NP | Northern Pacific | |
| NY&AR | NY & Atlantic Railway Co. | |
| NYMTA | NY Metro MTA | |
| OHCR | Ohio Central System | |
| OR&W | Ohio River & Western | |
| O&W | Onedia & Western | |
| ON | Ontario Northland | |
| OL | Oregon Lumber | |
| OP&E | Oregon Pacific & Eastern | |
| PE | Pacific Electric | |
| PGE | Pacific Great Eastern | |
| PA | Pan Am | |
| PAR | PanAm Railways | |
| PCL | Pardee Curtin Lumber & Co. | |
| P&BR | Patapsco & Back Rivers | |
| PEA | Peabody | |
| PC | Penn Central | |
| P | Pennsylvania | |
| PRR | Pennsylvania Railroad | |
| PRSL | Pennsylvania Reading Seashore Lines | |
| PM | Pere Marquette | |
| P&R | Philadelphia & Reading | |
| PK | Pickering | |
| P&N | Piedmont & Northern | |
| PV | Pioneer Valley | |
| P&WV | Pittsburgh & West Virginia | |
| P&LE | Pittsburgh and Lake Erie | |
| PH&D | Port Huron and Detroit | |
| PL | Potlach | |
| P&W | Providence & Worcester | |
| QGR | Quebec Gatineau Railway | |
| RB | Rail Box | |
| REA | Railway Express Agency | |
| R&N | Reading & Northern | |
| RDG | Reading Railroad | |
| RTA | Regional Transportation Authority | |
| RES | Rescar | |
| RF&P | Richmond, Fredricksburg and Potomac | |
| RG | Rio Grande | |
| RGS | Rio Grande Southern | |
| RnW | Roadname nach Wahl | |
| RI | Rock Island | |
| RS&P | Roscoe, Snyder and Pacific Railroad | |
| RUT | Rutland | |
| SR&N | Sabine River & Northern | |
| SFB | San Francisco Belt | |
| SF | Santa Fe | |
| SEA | Seaboard | |
| SAL | Seaboard Air Line | |
| SCL | Seaboard Coast Line | |
| SG | Seminole Gulf | |
| SN | Silverton Nothern | |
| SM | Smokey Mountain | |
| SOO | Soo Line | |
| SOUN | Sounder | |
| SB | South Buffalo | |
| SPC | South Pacific Coast | |
| SS | South Shore | |
| SW | South West | |
| S | Southern | |
| SC | Southern Cresent | |
| SP | Southern Pacific | |
| SOU | Southern Railway | |
| SpM | Spokane Moulding | |
| SM | Spokane Moulding | |
| SP&S | Spokane, Portland and Seattle | |
| SLA | St. Lawrence & Atlantic | |
| StLI | St. Louis Indiana | |
| StLSF | St. Louis San Francisco | |
| SMRR | St. Mary's Railroad | |
| SWIFT | Swift Refrigator Lines | |
| TBRR | Teddy Bear Railroad | |
| TA&G | Tennessee Alabama and Georgia | |
| TC | Tennessee Central | |
| T&P | Texas and Pacific | |
| TCT | Texas City Terminal | |
| TM | Texas Mexican | |
| TMR | Texas Mexican Railway | |
| TG | Texasgulf | |
| TFM | TFM | |
| TP&W | Toledo, Peoria and Western | |
| TH&B | Toronto Hamilton & Buffalo | |
| TT | Trailer Train | |
| TP | Triangle Pacific | |
| TTRX | TTRX | |
| TTX | TTX | |
| UND | Undecorated | |
| UC | Union Carbide | |
| UP | Union Pacific | |
| PFE | Union Pacific - Pacific Fruit Express | |
| UNR | Union Railroad | |
| USMC | United States Marine Corps | |
| UNL | Unlettered | |
| UNP | Unpainted | |
| USAF | US Air Force | |
| USAA | US Army | |
| USN | US Navy | |
| USS | US Steel | |
| UFR | Utah Front Runner | |
| UR | Utah Railway | |
| VTR | Vermont Railway | |
| VIA | VIA Rail Canada | |
| V&TRR | Virginia and Truckee Railroad | |
| VC | Virginia Central | |
| VRE | Virginia Railway Express | |
| VIR | Virginian | |
| WAB | Wabash | |
| WAR | Warwick | |
| WCE | West Coast Express | |
| WSL | West Side Lumber Co. | |
| WVP&P | West Virginia Pulp & Paper | |
| W&ARR | Western and Atlantic Railroad | |
| WM | Western Maryland | |
| WP | Western Pacific | |
| WRoA | Western Railway of Alabama | |
| WTC | Weyerhaeuser Timber Company | |
| W&LE | Wheeling & Lake Erie | |
| WHP | White Pass | |
| W&W | Winchester & Western | |
| WSOR | Wisconsin and Southern Railroad | |
| WC | Wisconsin Central | |
| W&S | Wisconson & Southern | |
| YPL | Yellow Pine Lumber | |
| YW | Yreka Western |