this post was submitted on 01 Jan 2025
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Why don't railroads need expansion joints? (www.youtube.com)
submitted 6 days ago* (last edited 6 days ago) by [email protected] to c/videos
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Practical Engineering's video on this is also really good: https://www.youtube.com/watch?v=zqmOSMAtadc

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[–] [email protected] 1 points 5 days ago (2 children)

Yeah in Melbourne several years back we had a heat wave that fucked up a bunch of the train tracks.

Isn't the thunk-thunk as you're travelling the wheels of the carriage passing over the expansion joints?.

[–] BangCrash 2 points 5 days ago

You should probably watch the video. It's informative and answers your question.

[–] [email protected] 4 points 5 days ago

Nowadays there are no thermal expansion joints, the rails are welded. Any thunk thunk left is at switches.