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I think it's best explained with an example
Like lets say you're traveling down the freeway at 70mph, and there is a false detection with the AEB system. With a 25mph reduction it brings you down to 45mph. It's going to be unnerving, and you'll be irked. But, odds are no one is going to crash into you. Unless they're on your butt where they don't give the proper following distance.
If you went from 70 to 0 with as much braking power as the car could give you'd likely end up with some SUV on your back.
The 25mph was picked because that's enough of a reduction in speed to be life saving.
In the end it's just a way of managing imperfect technology.
Let's take a closer look at the Volvo manual for details:While this could be the reasoning from Tesla, does this mean that their technology is subpar compared to other car brands?
As always, I recomend everyone to check out Euro-NCAP’s reviews and videos were they test AEB as a part of the safety rating. AEB counts toward the rating, so it’s becoming quite common in Europe.
Here’s from the latest test of the Volvo XC60:
«The autonomous emergency braking system scored maximum points when tested at highway speeds, with collisions avoided at all test speeds and in all scenarios.»
Official Volvo XC60 safety rating
The Toyoya Prius also avoids the crash completly.
Official Toyota Prius 2016 safety rating
Had to do some digging to find a car that has AEB and does not avoid the crash in all scenarios, like Tesla:
Official Mazda CX-5 safety rating
The Mazda CX5 only reduces the severity of the crash if following a car at short distance and the car in front brakes harshly.
If being rear ended was a common occurance due to faulty AEB on other car brands, surely we would have heard about i more often?
Adaptive Cruise Control utilizes approx. 40% of the vehicle's braking capacity. If a situation requires more braking force than the Adaptive Cruise Control can provide, and if the driver does not apply the brakes, a warning light and audible warning signal will be activated to alert the driver that immediate action is required.
Yes, that's exactly what it does. If the object you're going to crash into speeds away or if you're able to maneuver around it then you'll avoid the collision, but, for the most part, AEB should only go off if the collision is imminent.AEB designed to reduce the severity of the impact? So if it detects a crash and starts applying the brakes does that mean it’s too late and there’s going to be a crash no matter what? Like even if the driver takes over and steps on the brakes as hard as they can, is it too close to the object already and there’s not going to be enough braking distance?
Sounds like AEB reduces impact and cannot avoid it.
1) false positives are dangerous
2) it's not an autonomous car