eli5 Why do trucks and busses do the “tsshhh” thing when they stop?
In: Engineering
May someone please answer this; I thought the hissing was related to the suspension change in the schoolbus, when it starts hissing the suspension drops to allow easy access into the first step of the bus. I haven’t seen a reply yet covering this system of the bus. Is anyone sure the hissing isn’t the release of air suspension? Thx
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