how do trains travel through bridges?
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Answer:
by friction
Explanation:
friction is present there
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viaduct
A viaduct is a long bridge-like structure carrying a road or railway across a valley or other low ground.
Answer: Yep. Current speed for trains over the Steel Bridge span is 5mph instead of the usual 10mph. ... But a few Sundays ago, the speed was reduced to 5mph on the span because some of the sensors on the bridge had gotten damaged, and a slower speed means less vibration.
Train tracks used to have expansion joints (like bridges) that allowed them to move more in the heat and cold. But longer tracks means trains can travel faster and smoother, give less friction between the train and the tracks, and are easier to maintain.
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