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Tesla footage of braking before crash ahead [video]

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Re: Tesla footage of braking before crash ahead [video]

#11
post #4

I was very confused about this video until I watched it with the sound on. The Tesla beeps at the driver clearly before the accident has occurred, but doesn't appear to decelerate until afterwards.

I imagine it'd get pretty annoying (and dangerous) if it slammed on the breaks every time two cars got close. It knew what was happening and was ready to break when the accident actually occurred.

That's not what the article says is happening. The Tesla is alerting because the radar sees the (black) car in front of the (red) car in front (of the Tesla) is decelerating, even if the red car isn't, it's alerting because of that. It doesn't "know" they'll be an accident, it just predicts that it will have to slow.

Re: Tesla footage of braking before crash ahead [video]

#12
post #4

I was very confused about this video until I watched it with the sound on. The Tesla beeps at the driver clearly before the accident has occurred, but doesn't appear to decelerate until afterwards.

Most automatic systems brake proportionally to danger. On their own (without driver assistance) the goal is usually to bring an accident down to a "safe" speed like 30mph rather than prevent the crash completely.

I guess the point is to strike a balance between trust in the automatic systems and trust in the driver to make the right decisions.

Another way to look at it is that the system is designed to protect you, not the car. Use automatic braking to bring the crash down to something the car can protect you from, the rest is up to you

Re: Tesla footage of braking before crash ahead [video]

#13
post #7
post #2

I thought this an interesting video when Elon retweeted it. Basically the car is responding faster than the people do and keeping things from escalating. That said, having been on 101 when the cars in front start dancing like that I have to say my biggest worry isn't stopping in time its having someone behind me not stop.

And so was he. The first talking you hear is them telling the kids to stay put until they're sure no one is going to be rear ending them. Does anyone know if these braking systems account for people driving behind you? And if a collision is inevitable, what do they "choose"?

Most Tesla's on the road don't have rear facing radar. I don't think the rear facing camera is used for anything other than parking. So, that leaves ultrasound, which has limited range.

I would think in theory they could use the camera alone to detect an approaching vehicle, and take some remedial action.

Re: Tesla footage of braking before crash ahead [video]

#14
post #4

I was very confused about this video until I watched it with the sound on. The Tesla beeps at the driver clearly before the accident has occurred, but doesn't appear to decelerate until afterwards.

I imagine it'd get pretty annoying (and dangerous) if it slammed on the breaks every time two cars got close. It knew what was happening and was ready to break when the accident actually occurred.

> if it slammed on the breaks every time two cars got close

With some software I'm sure they can determine some unavoidable accidents before they happen.

Re: Tesla footage of braking before crash ahead [video]

#15
post #3
post #2

I thought this an interesting video when Elon retweeted it. Basically the car is responding faster than the people do and keeping things from escalating. That said, having been on 101 when the cars in front start dancing like that I have to say my biggest worry isn't stopping in time its having someone behind me not stop.

I expect an autopilot could deal with that situation much better than a human as well. It should be able to predict if the car behind won't stop. Certainly better than a human driver could (if the human would even notice the car coming from behind with that happening in front). Then, assuming there is some space open in front, as there was in this case, it could accelerate to avoid the collision from behind. Now I'm…

[deleted]

Re: Tesla footage of braking before crash ahead [video]

#16
post #2

I thought this an interesting video when Elon retweeted it. Basically the car is responding faster than the people do and keeping things from escalating. That said, having been on 101 when the cars in front start dancing like that I have to say my biggest worry isn't stopping in time its having someone behind me not stop.

That's why I usually break fast initially and check the rearview; extend the braking distance to allow extra room for the person behind if they are too close.

Re: Tesla footage of braking before crash ahead [video]

#17
post #7

Earlier quoted context omitted.

And so was he. The first talking you hear is them telling the kids to stay put until they're sure no one is going to be rear ending them. Does anyone know if these braking systems account for people driving behind you? And if a collision is inevitable, what do they "choose"?

Most Tesla's on the road don't have rear facing radar. I don't think the rear facing camera is used for anything other than parking. So, that leaves ultrasound, which has limited range. I would think in theory they could use the camera alone to detect an approaching vehicle, and take some remedial action.

When the car is motionless (e.g. immediately after it has come to a stop from the emergency breaking), does the computer engage the breaks just soft enough so the car stays put?

And would this reduce the impact from behind if it were to happen?

Re: Tesla footage of braking before crash ahead [video]

#18
post #16
post #2

I thought this an interesting video when Elon retweeted it. Basically the car is responding faster than the people do and keeping things from escalating. That said, having been on 101 when the cars in front start dancing like that I have to say my biggest worry isn't stopping in time its having someone behind me not stop.

That's why I usually break fast initially and check the rearview; extend the braking distance to allow extra room for the person behind if they are too close.

I wish more people did this. Pessimistic bumper buffers have saved me from a couple wrecks.

Re: Tesla footage of braking before crash ahead [video]

#19
post #7
post #2

I thought this an interesting video when Elon retweeted it. Basically the car is responding faster than the people do and keeping things from escalating. That said, having been on 101 when the cars in front start dancing like that I have to say my biggest worry isn't stopping in time its having someone behind me not stop.

And so was he. The first talking you hear is them telling the kids to stay put until they're sure no one is going to be rear ending them. Does anyone know if these braking systems account for people driving behind you? And if a collision is inevitable, what do they "choose"?

I have no idea if it looks behind, or uses that information for anything. Ideally, it would time it such that when it was rearended, it was touching the car in front. It would significantly increase the mass and decrese the risk of whiplash.

Re: Tesla footage of braking before crash ahead [video]

#20
post #18
post #16

Earlier quoted context omitted.

That's why I usually break fast initially and check the rearview; extend the braking distance to allow extra room for the person behind if they are too close.

I wish more people did this. Pessimistic bumper buffers have saved me from a couple wrecks.

I wish more people followed at a safe distance.
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