What does long long short long mean in Morse code?

Question: I'm curious about why trains use a Morse code signal when approaching crossings. Answer: For anyone confused by that question, next time you're waiting at a railroad crossing, listen to the train's horn. It's a long-long-short-long signal. That corresponds with the letter Q in Morse code.



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Note that three dots represent the letter S while three dashes represent the letter O. This code was developed in the 1840s by Samuel Morse and his assistant, Alfred Vail.

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What is I Love You In Morse Code? If you want to say I love you in Morse code, say like this — Di-di | di-dah-di-di dah-dah-dah di-di-di-dah di | dah-di-dah-dah dah-dah-dah di-di-dah. The word 'di' is equivalent to the short beep, while 'dah' is equivalent to the long beep.

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By 1938, the Association of American Railroads had adopted the long-long-short-long signal for rail crossings. But whatever the horn pattern, the goal is to warn people well in advance that a train is coming. In 2021, 236 people were killed at highway-rail grade crossings in the US.

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