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> somehow universally implemented across manufacturers... maybe.

They'd need to be implemented and then turned off for 15 years until 99% of the old cars are off the road and then flipped on simultaneously for every car.

If a car suddenly breaks then the car behind it better be able to suddenly break too.

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The need to suddenly brake is not a new phenomenon. Cars without AEB can achieve it the old fashioned way. The driver applying the brake.

The AEB in my 2015 Volvo applies some extra force to the brakes which exceeds just pushing the brake pedal all the way down. Also, according to Volvo statistics it seems that half of all drivers who hit another vehicle from behind do not brake at all prior to the collision. So no, they won't achieve it the old fashioned way all the time.

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