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@John: The "whip crack" sound you heard was probably the air bladder on the bus releasing excess pressure. Unlike cars, many buses have pneumatic suspensions and braking systems. (It may also power the door openers and other systems.) The engines constantly pump air into the system to maintain pressure, so the bus regulates the pressure by releasing excess air.

And the reason people honk is because it always solves the problem, no matter what the problem is. Pure magic!

by Stanton Park on Nov 10, 2010 12:16 pm • link • report

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