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  2. Railway semaphore signal - Wikipedia

    en.wikipedia.org/wiki/Railway_semaphore_signal

    Semaphore signals were patented in the early 1840s by Joseph James Stevens, and soon became the most widely used form of mechanical signal. Designs have altered over the intervening years, and colour light signals have replaced semaphore signals in most countries, but in a few they remain in use.

  3. North American railroad signals - Wikipedia

    en.wikipedia.org/.../North_American_railroad_signals

    A semaphore signal on the Atchison, Topeka and Santa Fe Railway in 1943. Semaphore signals were first developed in England in 1841. [2]: 169 Some U.S. railroads began to install them in the early 1860s, and semaphores gradually displaced other types of signals. The Union Switch & Signal company (US&S) introduced an electro-pneumatic design in ...

  4. North American railroad signaling - Wikipedia

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

    The NORAC rule book illustrates all signal aspects and indications which may appear on track operated by member railroads. However, GCOR does not illustrate signal aspects and indications because of the lack of uniformity between the participating railroads. Signal aspect and indication illustrations instead appear in each railroad's system ...

  5. Template:Railway signal mast - Wikipedia

    en.wikipedia.org/wiki/Template:Railway_signal_mast

    Railway signal mast}} is a template for displaying signals on a mast for demonstration of railroad signalling aspects. It displays up to three signal heads using spotlight, one of two types of semaphore, or positional signals, along with a base and modifier plates.

  6. Railway signalling - Wikipedia

    en.wikipedia.org/wiki/Railway_signalling

    The earliest types comprised a board that was either turned face-on and fully visible to the driver, or rotated so as to be practically invisible. While this type of signal is still in use in some countries (e.g., France and Germany), by far the most common form of mechanical signal worldwide is the semaphore signal. This comprises a pivoted ...

  7. Railway signal - Wikipedia

    en.wikipedia.org/wiki/Railway_signal

    A railway signal is a visual display device that conveys instructions or provides warning of instructions regarding the driver's authority to proceed. [1] The driver interprets the signal's indication and acts accordingly.

  8. images.huffingtonpost.com

    images.huffingtonpost.com/2012-08-30-3258_001.pdf

    Created Date: 8/30/2012 4:52:52 PM

  9. Australian railway signalling - Wikipedia

    en.wikipedia.org/wiki/Australian_railway_signalling

    There are two types of arms. A Distant signal uses a fishtail arm, Home and Starting signals use a square-tail arm. Semaphore distant signals in New South Wales are fitted with a fixed green light, positioned above the arm and spectacle, so that they may be easily distinguished from stop signals at night. Although yellow lights were trialled ...

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