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Mastodon
ANSWERS: 10
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things on the track - like cars and trucks also, tracks that are damaged
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a separation between train and tracks.
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Usually a problem with the track and its support ... sometimes a wheel or axle ... sometimes a collision ...
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In the U.S.. crappy railroad tracks ,they look exactly as they did in the 1880's
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Sometimes the change of the ground under the tracks can cause it. I know other ways to derail a train. But I will not tell, do to someone may just try it & cause death to others. And I don't think I could live with that.
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I think maybe most derailments are caused at crossover points in the track.
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rock slides, human error, train going too fast, incorrect use of brakes,track defects or faulty equipment. There is no one standard cause.
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Tracks are screwed up..
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As you can see, there are many reasons. Umfortunatly, most derailments are caused by human error. A driver not seeing a signal, a signalman not changing a track, a maintenance worker not replscing an item are just some examples of why some trains have come off.
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"wide gauge" :) As in... "too wide of gauge" Was the number one reason I saw. :) The outside rail on a curve really catches hell. ;-) The ties (sleepers) have to hold it all together and over time open up and let the rails get too far apart. Concrete ties are making that problem a thing of the past tho. Worn wheels plus worn rails, the inside flange of the wheel can get sharp enough to begin riding up on worn rails. Saw many broken rails and only remember one derailment from that and that was because it broke again about 2+1/2 feet from the first break. Worn "frog points" was another source of trouble but kept down by constant re-welding. :)
- M.C.S. - Dave 
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