Why are there stones around train tracks?
QuestionOn a train track, there are rocks and stones around the tracks. Why are they there?
Name: Gary, Clapham
Qualification: Work for Network Rail
Answer: It’s there to stop the track moving. It’s called ballast and stops the tracks moving laterally when the trains are moving over it. Think about walking along a pebbly beach and the rocks support your weight – this works in a similar way. The stones act like a locking mechanism to keep the sleepers in place.
Is this answer wrong? Tell us what’s right in the box below…