4 ms·

I don't agree with this. Not hitting pedestrians should not just be an afterthought. Of course the car should recognise the stop sign, but there are cases in wh

by b3orn 1y ago

I don't agree with this. Not hitting pedestrians should not just be an afterthought. Of course the car should recognise the stop sign, but there are cases in which stop signs are obstructed or missing, and in those cases pedestrians should still not be hit by a car.

potato3732842 1y ago
>I don't agree with this. Not hitting pedestrians should not just be an afterthought. You're disagreeing with something I didn't say. There's a difference between afterthought and the primary initiator of the stop in a situation like this. >Of course the car should recognize the stop sign, but there are cases in which stop signs are obstructed or missing, and in those cases pedestrians should still not be hit by a car. The surprise pedestrian test is one that any vehicle can be made to fail by sheer physics. Avoiding errant pedestrians like in the video will likely only come as a byproduct of better situational behavior by self driving vehicles. The overwhelming majority of drivers know to ignore the speed limit if the situation is rife with pedestrians or otherwise sus and are generally fine with missing/obstructed stop signs. I don't know what route self driving software will take to approximate such behavior but it likely will need to.
- ChoGGi 1y ago
  > The surprise pedestrian test is one that any vehicle can be made to fail by sheer physics. There's different degrees of failure as well, did the Tesla try to brake beforehand or apply brakes after hitting the doll?
- Mawr 1y ago
  > The overwhelming majority of drivers know to ignore the speed limit if the situation is rife with pedestrians or otherwise sus and are generally fine with missing/obstructed stop signs. This sentence makes me want to cry. Sure, I may know drivers treat speed limits as minimum acceptable speed at best, but seeing it unironically spelled out like this hurts. Please, it's just two simple words: 1) speed 2) limit. L I M I T. It's the maximum allowable speed. No, it's not the minimum speed, no it's not the target speed, no, it's not "more of a guideline than anything". You are not allowed to go faster. It says nothing about a minimum speed. It says nothing about what speed you should drive at. All it does is limit the maximum speed. Repeat after me, it's a speed L I M I T. Just kidding though, I know even speaking like I would to a 5 year old won't do it, this mentality runs far too deep. There's no hope.
alexey-salmin 1y ago
Yes, but recognizing a pedestrian when he jumps in front of your car is useless -- you don't have time to stop anyway. What you WANT to recognize is conditions when such an event is possible (obstructed vision) and to slow down in advance even if you don't see/detect any pedestrians at the moment. This obviously includes the case with the school bus and the stop sign but, as you correctly point out, is not limited to that. There are more cases when a pedestrian, especially a child, can jump under your car from behind a big vehicle or an obstacle. Recognizing these situation and slowing down in advance is a characteristic trait of a good-intentioned experienced driver. Though I think that most of the time it's not a skill you have straight out of driving courses, it takes time and a few close calls to burn it into your subconsciousness.
- BobaFloutist 1y ago
  At 25 mph, which I would hope would be the speed limit on roads next to schools, slamming on the brakes even seconds before colliding with children can make an enormous difference in how fast the car is going when it hits the kid. Speed is the factor in collisions (other than weight), and modern brakes are incredibly good. Not to mention that the car, with it's 360 degree sensors, could safely and efficiently swerve around the children even faster than it can brake, as long as there's not a car right next to you in another lane -- and even if there is, hitting another car is far less dangerous to their life than hitting the children is to yours. These things should be so much better than we are, since they're not limited by unidirectional binocular vision, but somehow they're largely just worse. Waymo is, at best, a bit better. On average.
  - bryanlarsen 1y ago
    25mph is 36 feet per second, about the length of a school bus. The stopping distance at 25mph is 30 feet, assuming perfect reaction time and dry pavement. Human reaction time is about 750ms, so stopping distance is about 2 school bus lengths. You don't have seconds. 25mph is too fast for any street where kids may jump out behind parked cars. Not just school zones, but all residential streets. There's a knee at about 20mph in the traffic fatality stats where below that speed pedestrian collisions are unlikely to be fatal. Above 20mph fatalities become more common quite quickly.

by b3orn 1y ago

potato3732842 1y ago

>I don't agree with this. Not hitting pedestrians should not just be an afterthought. You're disagreeing with something I didn't say. There's a difference between afterthought and the primary initiator of the stop in a situation like this. >Of course the car should recognize the stop sign, but there are cases in which stop signs are obstructed or missing, and in those cases pedestrians should still not be hit by a car. The surprise pedestrian test is one that any vehicle can be made to fail by sheer physics. Avoiding errant pedestrians like in the video will likely only come as a byproduct of better situational behavior by self driving vehicles. The overwhelming majority of drivers know to ignore the speed limit if the situation is rife with pedestrians or otherwise sus and are generally fine with missing/obstructed stop signs. I don't know what route self driving software will take to approximate such behavior but it likely will need to.

ChoGGi 1y ago
> The surprise pedestrian test is one that any vehicle can be made to fail by sheer physics. There's different degrees of failure as well, did the Tesla try to brake beforehand or apply brakes after hitting the doll?
Mawr 1y ago
> The overwhelming majority of drivers know to ignore the speed limit if the situation is rife with pedestrians or otherwise sus and are generally fine with missing/obstructed stop signs. This sentence makes me want to cry. Sure, I may know drivers treat speed limits as minimum acceptable speed at best, but seeing it unironically spelled out like this hurts. Please, it's just two simple words: 1) speed 2) limit. L I M I T. It's the maximum allowable speed. No, it's not the minimum speed, no it's not the target speed, no, it's not "more of a guideline than anything". You are not allowed to go faster. It says nothing about a minimum speed. It says nothing about what speed you should drive at. All it does is limit the maximum speed. Repeat after me, it's a speed L I M I T. Just kidding though, I know even speaking like I would to a 5 year old won't do it, this mentality runs far too deep. There's no hope.

alexey-salmin 1y ago

Yes, but recognizing a pedestrian when he jumps in front of your car is useless -- you don't have time to stop anyway. What you WANT to recognize is conditions when such an event is possible (obstructed vision) and to slow down in advance even if you don't see/detect any pedestrians at the moment. This obviously includes the case with the school bus and the stop sign but, as you correctly point out, is not limited to that. There are more cases when a pedestrian, especially a child, can jump under your car from behind a big vehicle or an obstacle. Recognizing these situation and slowing down in advance is a characteristic trait of a good-intentioned experienced driver. Though I think that most of the time it's not a skill you have straight out of driving courses, it takes time and a few close calls to burn it into your subconsciousness.

BobaFloutist 1y ago
At 25 mph, which I would hope would be the speed limit on roads next to schools, slamming on the brakes even seconds before colliding with children can make an enormous difference in how fast the car is going when it hits the kid. Speed is the factor in collisions (other than weight), and modern brakes are incredibly good. Not to mention that the car, with it's 360 degree sensors, could safely and efficiently swerve around the children even faster than it can brake, as long as there's not a car right next to you in another lane -- and even if there is, hitting another car is far less dangerous to their life than hitting the children is to yours. These things should be so much better than we are, since they're not limited by unidirectional binocular vision, but somehow they're largely just worse. Waymo is, at best, a bit better. On average.
- bryanlarsen 1y ago
  25mph is 36 feet per second, about the length of a school bus. The stopping distance at 25mph is 30 feet, assuming perfect reaction time and dry pavement. Human reaction time is about 750ms, so stopping distance is about 2 school bus lengths. You don't have seconds. 25mph is too fast for any street where kids may jump out behind parked cars. Not just school zones, but all residential streets. There's a knee at about 20mph in the traffic fatality stats where below that speed pedestrian collisions are unlikely to be fatal. Above 20mph fatalities become more common quite quickly.