Because a fence wouldn't stop a train from falling off a bridge. Even a very strong side might not stop it either, although it would have a better chance.Why do all the photos, You Tube clips,etc. show the high trestles most of the time don't have sides or fences to keep trains from taking a huge fall? Myron. Ohio.
However the chance of a train falling off a bridge is next to nothing. You're far more likely to have a car accident than to be in a train that falls off a bridge.
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