I was reading about Link Light Rail on the Sound Transit website and found that the Operations and Maintenance building will have "a body shop with frame straightening equipment" and wondered how in the world they'd need one of those. (A frame straightener is a concrete slab with steel slots in it that you use to bend the train or large truck's frame straight again.) Surely the trains won't hit anything big enough to bend the frame!
Then I saw this video, I guess people are dumb enough to turn in front of the train often enough that eventually it would be out of true.
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