[fiddlerwoaroof]

My Tesla has regularly come to a full stop from freeway speeds in response to traffic ahead. This may not be 100% reliable, but it’s not true that “the system is trained to ignore stationary objects”.

It also beeps when it thinks I’m going to hit a stopped car and other things that demonstrate that this claim is false.

[gambiting]

The question was specifically about this situation as described in the article - the car moving at 150km/h. No, your Tesla wouldn't stop in time for a fully stopped car in that situation.

It does slow down for traffic, but I think many people don't realize something - it works with moving traffic, because then it can definitely recognize that you are approaching a car(or at least something that moves in the same direction you do), so it knows it has to slow down for it.

>>It also beeps when it thinks I’m going to hit a stopped car and other things that demonstrate that this claim is false.

Read up on it, I'm sure the upper limit for this function is when the delta speed is <50km/h. It won't work with a delta of 150km/h because it's physically not possible.

>> but it’s not true that “the system is trained to ignore stationary objects”

These are not my words, that's exactly what Tesla said after the "trailer across a highway" accident, saying that of course they have to ignore stopped objects otherwise the car would emergency brake for overhead signs since they reflect radar the same way a stationary car does - at large enough distance there is no difference.

[fiddlerwoaroof]

>> These are not my words, that's exactly what Tesla said after the "trailer across a highway" accident

>> Read up on it, I'm sure the upper limit for this function is when the delta speed is <50km/h. It won't work with a delta of 150km/h because it's physically not possible.

I think both of these have the same explanation: if you want to release a feature like this specced at a 50kph delta, you design for a safety factor of 2-3 (100-150) so that you can be confident that it’s safe at 50kph. The claim that “it’s physically impossible” doesn’t make sense to me: humans drive safely with such deltas using only “a video feed” and sound.

Anyways, I’m fairly certain I’ve come to a stop on autopilot from at least 60mph (100kph).

[gambiting]

>>The claim that “it’s physically impossible” doesn’t make sense to me: humans drive safely with such deltas using only “a video feed” and sound.

My logic is as follows - at 150km/h, you are covering 41m per second, and an approximate stopping distance from that speed is about 130m. Human eyes are much better at recognizing objects from a distance than computer based vision is, and Tesla is in fact relying on cameras for its forward object detection, plus a rudimentary distance-based radar. There is no chance(that's why I said "physically impossible") that whatever camera is mounted in the Tesla can reliably recognize an object(and tell that it's stopped!) at 130m. Of course the system needs to do the processing, make a decision, send a signal to the brake actuators and actually engage them. Let's be generous and add a full second to this - so to stop from that speed Tesla would need to recognize a car, identify it as a hazard, and make a critical "all brakes at maximum strength" decision from 170m away. There's no chance.

>>Anyways, I’m fairly certain I’ve come to a stop on autopilot from at least 60mph (100kph).

Ok, but there will be an upper limit to this, and I'd love to know what it is. I know that Deimler's solution only guarantees full avoidance at deltas up to 50km/h, and "reduced" impact at higher deltas - it just doesn't see far enough. Tesla's technology is fundamentally very similar, so I'd love to know what they consider as reasonable distance for full autonomous stop.