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Re:Waymo to begin testing on San Francisco freeways this week by tanseydavid on Monday August 12, 2024 @11:44PM (#41232009)
>> and there was absolutely no indication of what caused it

That's the Accordion Effect.

With enough cars on the road, one little tap of someone's brakes flashes their brake lights and it ripples upstream until the 80mph column of cars is forced to go to down to zero ASAP.

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