Transport
Why sleeper trains loosen between cars at night
HERE’S THE INTERESTING PART
Carriages are inherently violent, shaky metal tubes, which makes trying to rest in one a terrible idea. To solve this, evening routes use variable coupling systems that physically loosen the rigid connection between cabins at night. This absorbs the violent jolts and slamming, theoretically allowing passengers to drift off instead of being aggressively vibrated for eight hours.
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