Why Are There Stones Along Railway Tracks?
Published November 5, 2020
Views 11.7M | Likes 185K | Comments 3.65K
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Why are there stones on railway tracks? Those crushed stones are called track ballast, and they serve 7 critical purposes — from holding sleepers in place and distributing the immense weight of trains, to preventing flooding, vegetation growth, and heat expansion. In this video, we explain what track ballast is, why th…
- Published
- November 5, 2020
- Made for kids
- No
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