| MRR |
 |
Mineral Rail Road Co. (The) |
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| MRr |
|
Manistee Railroad Co. |
|
| MRr |
|
Marginal Railroad (Unincorporated Co.) |
|
| MRr |
|
Marysville Railroad Co. (The) |
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| MRy |
|
Manufacturers Railway Co. (The) |
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| MRy |
|
Marion Railway Corp. |
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| MRy |
|
Michigan Railway Co. |
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| M&A |
|
Missouri & Arkansas Railway Co. |
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| M&A |
|
Mohawk and Adirondack Railroad Co. |
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| M&B |
|
Madison and Beloit Railroad Co. |
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| M&BR |
|
Muskegon and Big Rapids Railroad Co. |
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| M&C |
|
Marietta and Cincinnati Rail Road Co. |
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| M&C |
|
Milwaukee and Chicago Railroad Co. (The) |
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| M&CRr |
|
Middletown and Cincinnati Railroad Co. (The) |
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| M&CRy |
|
Middletown and Cincinnati Railway Co. (The) |
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| M&CRR |
|
Montpelier and Chicago Rail Road Co. |
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| M&CRr |
|
Montpelier and Chicago Railroad Co. (The) |
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| M&CC |
|
Mifflin and Centre County Railroad Co. |
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| M&D |
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Maryland and Delaware Rail Road Co. |
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| M&E |
|
Marion & Eastern Railroad Co. |
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| M&E |
|
Montgomery & Erie Railway Co. (The) |
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| M&E |
|
Morristown & Erie Railroad Co. |
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| M&F |
|
Muskegon and Ferrysburg Rail Road Co. (The) |
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| M&G |
|
Mobile & Gulf Railroad Co. |
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| M&H |
|
Mohawk and Hudson Rail Road Co. |
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| M&I |
|
Madison and Indianapolis Railroad (Unincorporated Co.) |
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| M&I |
|
Madison and Indianapolis Railroad Co. |
|
| M&L |
|
Marion and Logansport Railroad Co. |
|
| M&M |
|
Milwaukee and Madison Railway Co. |
|
| M&M |
|
Mississippi and Missouri Rail Road Co. |
|
| M&M |
|
Missouri and Mississippi Railroad Co. |
|
| M&M |
|
Mohawk and Malone Railway Co. (The) |
|
| M&M |
|
Morley & Morehouse Railroad Co. |
|
| M&MV |
|
Marion and Mississinewa Valley Railroad Co. (The) |
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| M&NA |
|
Missouri & North Arkansas Railroad Co. |
|
| M&N-ERr |
|
Manistee and North-Eastern Railroad Co. |
|
| M&NERy |
|
Manistee and Northeastern Railway Co. |
|
| M&NW |
|
Midland and Northwestern Railway Co. |
|
| M&NW |
|
Milwaukee and Northwestern Railway Co. |
|
| M&NW |
|
Mobile and Northwestern Railroad Co. |
|
| M&O |
|
Manchester & Oneida Railroad Co. |
|
| M&O |
|
Marion and Ottawa Railroad Co. |
|
| M&O |
|
Mobile and Ohio Rail Road Co. (The) |
|
| M&P |
|
Marietta and Pittsburgh Rail Road Co. (The) |
|
| M&P |
|
Minnesota & Pacific Railroad Co. |
|
| M&RRJ |
|
Mississippi and Rock River Junction Railroad Co. (The) |
|
| M&SL |
|
Marquette and State Line Rail Road Co. |
|
| M&SL |
|
Momence and State Line Railroad Co. |
|
| M&StC |
|
Minneapolis & St. Cloud Railroad Co. |
|
| M&StL |
|
Malone and St. Lawrence Railway Co. |
|
| M&StL |
|
The Memphis and St. Louis Railroad Co. |
|
| M&StLRr |
|
Minneapolis & St. Louis Railroad Co. (Peoria Gateway) |
|
| M&StLRy |
|
Minneapolis & St. Louis Railway Co. (Peoria Gateway) |
|
| M&StP |
|
Milwaukee & St. Paul Railway Co. |
|
| M&W |
|
Mississipi & Wabash Railroad Co. |
|
| MA&DM |
|
Moulton, Albia and Des Moines Railroad Co. (The) |
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| MA&PA |
|
Maryland & Pennsylvannia Railroad Co. |
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| MAL |
|
Michigan Air Line Railroad Co. (The) |
|
| MB&S |
|
Muscatine, Burlington and Southern Railroad Co. |
|
| MBH&C |
|
Milwaukee, Benton Harbor & Columbus Railway Co. |
|
| MC |
|
Madison County Railroad Co. |
|
| MC (MEC) |
|
Maine Central Railroad Co. |
|
| MC |
|
Michigan Central Railroad Co. (The) |
|
| MC |
|
Middle Creek Railroad Co. |
|
| MC |
|
Mississipi Central Rail-Road Co. |
|
| MC |
|
Mill Creek Railroad Co. |
|
| MC |
|
Motley County Railway Co. |
|
| MC&A |
|
Mount Carmel and Alton Rail Road Co. (The) |
|
| MCCR |
|
MaC Cloud River Railroad Co. |
|
| MCK&B |
|
McKean and Buffalo Railroad Co. |
|
| MCK&B |
|
McKeesport and Bessemer Rail Road Co. (The) |
|
| MC&LMRR |
|
Mansfield, Coldwater and Lake Michigan Rail Road Co. |
|
| MC&LMRy |
|
Mansfield, Coldwater and Lake Michigan Railway Co. |
|
| MCG&LC |
|
Mount Carbon, Gunnison and Lake City Rail Road and Coal Transportation Co. (The) |
|
| MD&W |
|
Minnesota, Dakota & Western Railway Co. |
|
| ME&W |
|
Minden East & West Railroad Co. |
|
| MEP&P |
|
Memphis, El Paso and Pacific Railroad Co. |
|
| MF |
|
Mahopac Falls Railroad Co. (The) |
|
| MGARr |
|
Monongahela Railroad Co. (The) |
|
| MGARy |
Monongahela Railway Co. (The) |
 |
| MGR&I |
|
Muskegon, Grand Rapids and Indiana Rail Road Co. (The) |
|
| MH |
|
Mine Hill Railroad Co. |
|
| MH&J |
|
Mobile, Hattiesburg and Jackson Railroad Co. (of Alabama) |
|
| MH&J |
|
Mobile, Hattiesburg and Jackson Railroad Co. (of Mississippi) |
|
| MHM |
|
Mount Hope Mineral Railroad Co. |
|
| M-I |
|
Missouri-Illinois Railroad Co. |
|
| MI&P |
|
Madison, Indianapolis and Peru Railroad Co. |
|
| MI&StLRr |
|
Madison, Illinois & St. Louis Railroad Co. |
|
| MI&StLRy |
|
Madison, Illinois & St. Louis Railway Co. |
|
| MJ |
|
Manufacturers Junction Railway Co. |
|
| MJ&KC |
|
Mobile, Jackson and Kansas City Railroad Co. |
|
| MK&T |
|
Missouri, Kansas and Texas Railway Co. (KATY) |
|
| MK&T |
|
Missouri, Kansas & Texas Railway Co. of Texas |
|
| MK&TE |
|
Missouri, Kansas and Texas Extension Railway Co. |
|
| M-K-T |
|
Missouri-Kansas-Texas Railroad Co. (KATY) |
|
| M-K-T |
|
Missouri-Kansas-Texas Railroad Co. of Texas |
|
| ML&T |
|
Morgan's Louisiana and Texas Railroad and Steamship Co. |
|
| MLS |
|
Michigan Lake Shore Rail Road Co. |
|
| MM |
|
Maryland Midland Railway Co. |
|
| MM&C |
|
Moosic Mountain and Carbondale Railroad Co. (The) |
|
| MN |
|
Minnesota Northern Railroad Co. |
|
| MN |
|
Modoc Northern Railway Co. |
|
| MN&S |
|
Minneapolis, Northfield & Southern Railway Co. |
|
| MN&SRr |
|
Muscatine North and South Railroad Co. |
|
| MN&SRy |
|
Muscatine North and South Railway Co. |
|
| MNC |
|
Midland North Carolina Railway Co. (The) |
|
| MO&GRr |
|
Missouri, Oklahoma & Gulf Railroad Co. (The) (in Kansas) |
|
| MO&GRr |
|
Missouri, Oklahoma and Gulf Railroad Co. (in Oklahoma) |
|
| MO&GRy |
|
Missouri, Oklahoma and Gulf Railway Co. |
|
| MO&GRy |
|
Missouri, Oklahoma & Gulf Railway Co. of Texas |
|
| MONON |
|
Monon Railroad Co. (The Hoosier Line) |
|
| MPRr |
|
Missouri Pacific Railroad Co. (MoPac) |
 |
| MPRy |
|
Missouri Pacific Railway Co. |
| MPRy |
Missouri Pacific Railway Co. (of 1880) (The) |
| MPRy |
|
Missouri Pacific Railway Co. (of 1909) (The) |
| MPRy |
|
Missouri Pacific Railway Co. in Kansas (The) |
|
| MP&C |
|
Marietta, Pittsburgh and Cleveland Railway Co. |
|
| MP&M |
|
Montague, Pentwater and Manistee Railroad Co. (The) |
|
| MP&P |
|
Moss Point & Pascagoula Railroad Co. |
|
| MR |
|
Missouri River Railroad Co. |
|
| MR&SR |
|
Monongahela River and Streets Run Rail Road Co. |
|
| MRV |
|
Missouri River Valley Railroad Co. |
|
| MS |
|
Michigan Southern Rail Road Co. (The) |
|
| MS&NI |
|
Michigan Southern and Northern Indiana Rail Road Co. (The) |
|
| MSE |
|
Missouri Southeastern Railway Co. |
|
| MStP&SStMRr |
|
Minneapolis, St. Paul and Sault Ste. Marie Railroad Co. |
|
| MStP&SStMRy |
|
Minneapolis, St. Paul & Sault Ste. Marie Railway Co. |
|
| MT&SP |
|
Marshall, Timpson and Sabine Pass Railway Co. |
|
| MV |
|
Miami Valley Railway Co. |
|
| MV |
|
Midland Valley Railroad Co. |
|
| MV |
|
Mohawk Valley Rail Road Co. |
|
| MV |
Mohawk Valley Rail Road Co. (The) |
|
| MV |
|
Monongahela Valley Railroad Co. |
|
| MV&N |
|
Mohawk Valley and Northern Railway Co. (The) |
|
| MVNG |
|
Miami Valley Narrow Gauge Railway Co. (The) |
|
Logos are the property of their respective Companies.
Les logos sont la propriété de leurs Sociétés respectives.