Can a person hear an approaching train?

Sound travels about 15 times faster in iron (or steel) than in air. So, sound travels much faster through the railway track made of steel than through air. That is why we can hear the sound of an approaching train even when the train is far off but its sound cannot be heard through the air. Q.



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As the railway track is solid, the sound travels faster through the track than through air and a person can hear an approaching train .

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“People assume that trains are loud, but that assumption is based on the fact that when a train's gone past them in a station it's noisy. That's because the noise a train makes is mainly projected to either side. When trains are moving directly towards you they are barely audible–until it's too late.”

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That's because the noise a train makes is mainly projected to either side. When trains are moving directly towards you they are barely audible–until it's too late.” He adds: “It's surprisingly easy to overload the brain to the point where it can't triangulate where sound is coming from.”

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With a quiet background (countryside night time) 6–8 miles. Suburban, 2–3 miles. Loud city, 1 mile if you're listening for it.

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By the time a train operator sees you, it is too late to stop the train in time. An oncoming train is moving faster and is closer to you than it appears. Similar to an airplane traveling at 150 mph that appears to float onto the runway, it's hard to determine a train's speed and distance from you.

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When the rule established the requirement for routine sounding of the locomotive horn, a procedure was also established whereby localities that could meet certain safety requirements might designate as a “quiet zone” a segment of a rail line with one or more consecutive public highway-rail grade crossings.

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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.

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Stop, look both ways, and listen. Know that trains always have the right of way. Don't stop on the tracks. Make sure you have room to get across.

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Noise pollution and vibrations are some of the biggest concerns, particularly for people who live within one-third of a mile of railroads or railyards, says Natalia Caldeira Loss Vincens, an expert in public health at the University of Gothenburg in Sweden.

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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.

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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, we sometimes can't see them coming, especially around the many blind curves near or ahead of the train station.

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The intensity of sound will vary at night, sometimes louder and sometimes softer. It has to do with the height and strength of a temperature inversion just above the ground. On clear, calm nights, it is cooler at the ground than higher up.

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Modern trains have lots of stuff underneath. Motors, gearboxes, big boxes of power electronics, etc, etc. There is very little spare room under many trains, and chances are something will grab you and bundle you up into a disorganised mess of broken limbs. You probably won't die straight away, it'll take a while.

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In the United States it is the law, same as if involved in a vehicle to vehicle accident or accident with a pedestrian on the road is the same on the railroad, the law and railroad operating rules always require stopping the train after an accident or incident and rendering aid to injured people.

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It has to do with the height and strength of a temperature inversion just above the ground. On clear, calm nights, it is cooler at the ground than higher up. When air warms with altitude a temperature inversion exists. Sound travels faster in warm air than it does in cool air.

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