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  2. Railroad classes - Wikipedia

    en.wikipedia.org/wiki/Railroad_classes

    Class I railroads had an annual operating revenue of at least $1 million, while Class III railroad incomes were under $100,000. Railroads in both classes were subject to reporting requirements on a quarterly or annual schedule. In 1925, the ICC reported 174 Class I railroads, 282 Class II railroads, and 348 Class III railroads. [1]

  3. List of U.S. Class I railroads - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._Class_I_railroads

    In the United States, railroads are designated as Class I, Class II, or Class III, according to size criteria first established by the Interstate Commerce Commission (ICC) in 1911, and now governed by the Surface Transportation Board (STB). The STB's current definition of a Class I railroad was set in 1992, that being any carrier earning annual ...

  4. North American railroad signaling - Wikipedia

    en.wikipedia.org/wiki/North_American_railroad...

    Some form of ATS or ATC is required on all U.S. rail lines that operate at 80 mph or more. In the 1990s, Communication-based train control (CBTC) systems started to be used in rail transit systems. These systems utilize radio communications between train and wayside equipment to perform the functions of the signaling system.

  5. North American railroad signals - Wikipedia

    en.wikipedia.org/wiki/North_American_railroad...

    There are two main types of signaling aspect systems found in North America, speed signaling and weak route signaling. [citation needed] Speed signaling transmits information regarding how fast the train is permitted to be going in the upcoming segment of track; weak route signaling transmits information related to the route a train will be taking through a junction, and it is incumbent upon ...

  6. Glossary of North American railway terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_North_American...

    The agency which oversees rail operation regulations and safety requirements for U.S. freight, passenger and commuter rail operations [104] Filet Converting a double-stack container train to single stack by removing the top layer of containers, allowing the rest of the train to proceed along track that lacks double stack clearance. The removed ...

  7. AAR wheel arrangement - Wikipedia

    en.wikipedia.org/wiki/AAR_wheel_arrangement

    The AAR wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads.Essentially a simplification of the European UIC classification, it is widely used in North America to describe diesel and electric locomotives (including third-rail electric locomotives).

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  9. List of shortline railroads in the United States by state

    en.wikipedia.org/wiki/List_of_shortline...

    Rail Link (operates 26 short line railroads) RLIX Housatonic Railroad (HRRC) (CT, MA, NY) HRRC Idaho Northern & Pacific Railroad (ID and OR) INPR Kankakee, Beaverville and Southern Railroad (IL and IN) KBSR New York New Jersey Rail (NJ and NY) NYNJ Pend Oreille Valley Railroad (ID and WA) POVA St Lawrence & Atlantic Railroad (ME, NH, and VT) SLA