I always thought it was to help with traction during winter... They are only pre... | Hacker News

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		osti on Dec 30, 2022 \| parent \| context \| favorite \| on: What are those dents in I-90 outside Seattle? I always thought it was to help with traction during winter... They are only present outside the city afaik.

dbavaria on Dec 30, 2022 [–]

They're present in the city too, here are some in Seattle:

https://maps.app.goo.gl/2j5H4gEXKrRVFr469

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