Why do train tracks have small stones around them? Here’s what they actually do

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If you have ever looked out of a train window, you may have noticed the thick layer of small stones spread around the railway tracks. They can look like ordinary pieces of gravel, but they are actually an important part of how traditional railway tracks are built.

These stones are known as ballast, and they perform several specific jobs that help keep the track stable, drained, and properly aligned.

Images: Canva (for representative purposes only)



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