The second part of the article is about heat restrictions. I watched a video a few weeks ago about why train tracks don’t need expansion joints anymore and mitigating heat issues. Sounds like the people in charge in New Zealand need to learn about these advances.

[–] [email protected] 5 points 8 months ago (1 children)

I would caution that there's a fair gap between "don't need expansion joints" and "don't have heat restrictions". A few days a year of heat restrictions could be considered a reasonable engineering trade-off, if it manages costs

[–] [email protected] 3 points 8 months ago

I’m not an expert by any means, but the engineer who makes the videos spent a good bit of time talking about the importance of building for the hottest days and how they do that. I don’t remember now if he talked about heat restrictions on speed, but the point was definitely about minimizing deformations to the track.

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