Practice question

Which of the following horn signals is typically used by a crew to indicate a train is approaching a public grade crossing?

  1. Two long blasts followed by one short blast
  2. Two long, one short, and one long blast (long-long-short-long)
  3. Three short blasts followed by one long blast
  4. One long continuous blast

Answer: B — Two long, one short, and one long blast (long-long-short-long)

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