Crossings: 2 long, 1 short, 1 long - means train is coming. That last long is to be held until the train has occupied the crossing. Also, not all crossings require a whistle. Fire: 3 short, pause, 3 short - warn nearby people/crews/etc.
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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.
If you hear horn is being blown continuously, you have to understand that the train is passing through stations without any halts. This is to alert passengers. If you hear one long horn and one shorter horn, it means the motorman is signaling the guard to set the break pipe system before they start the engine.
It is the standard signal used when the train is about to move forward. Two long blasts of the horn are for warning anyone near the train that it is about to move forward. There are other standardized horn signals like three short blasts for the train about to move backward.
Anyway, don't blame the engineer: They're required to blow that horn. The regulation in question is called the Final Rule on the Use of Locomotive Horns—a name that strongly implies they've had just about enough of your bitching—and it requires four blasts 15 to 20 seconds before every crossing.
The reason that trains honk their horns so much at night is because it's dark and the trains aren't so easy to see. Even though the lights are on, you sometimes can't see them coming, especially around the many blind curves that Gilroy has, like the one near Leavesley and the one near the train station.
This rule applies 24 hours a day, even if a crossing is equipped with lights, bells and crossing gates. Train crews also may deem it necessary to sound a horn as a warning when there is a vehicle, person or animal near the tracks.
Under the Train Horn Rule (49 CFR Part 222, issued on August 17, 2006), locomotive engineers must begin to sound train horns at least 15 seconds, and no more than 20 seconds, in advance of all public grade crossings.
Four short blasts on the horn is sometimes called the “blind bend signal.” It can be used to indicate you are approaching a bend in a river where oncoming traffic might not see you. It can also mean you are leaving your dock or slip.
Have you ever thought why trains blow their horns so often and so loudly? The truth is that they have to. And the main reason for that is safety. Locomotive engineers are required to honk every now and then, which is written down in the regulations called the Final Rule on the Use of Locomotive Horns.
One short blast tells other boaters, “I intend to pass you on my left (port) side.” Two short blasts tell other boaters, “I intend to pass you on my right (starboard) side.” Three short blasts tell other boaters, “I am operating astern propulsion.” For some vessels, this tells other boaters, “I am backing up.”
If you hear, two small horns, it means the motorman is asking the guard to direct the railway signal to start the train. 3.Three smaller horns. In case you hear three smaller horns, it suggests that the motorman has lost control over the train. This also acts as a signal to pull the vacuum break immediately.