4 ms·

This looks like a solvable problem, why aren't bumpers/hoods/doors optimized to protect pedestrians and bikers?

by lumost 5y ago

dharmab 5y ago
Pedestrian impact is an explicit design feature in modern cars. That's why bumpers and hoods have the same general shape on nearly every modern car. However, trucks and SUV have become extremely popular. There's only so much you can compensate for when the mass of the car is increased. IIHS is changing tests now to incorporate pedestrian safety tests. NHTSA is also considering the change.
- stefan_ 5y ago
  There is zero technical reason for trucks and SUVs to have the large hood they do that strikes adult pedestrians center mass (and kids at head level). It's extra comical on the upcoming electronic versions where instead of safe design, you get a "frunk". It's design nonsense and the only reason it ever got this bad is the regulators are fully captured.
i80and 5y ago
New hoods often are, actually — Euro NCAP tests pedestrian collision safety. Notably the VW ID.4 at least has a hood designed to collapse inward in that case; I assume other cars have this feature as well
VectorLock 5y ago
How long until airbag hoods?
- minitoar 5y ago
  Yeah ideally the whole car upon impact would instantly turn into a big sploosh of medicated gel, safely ensconcing passengers and nearby pedestrians or cyclists and bringing everything to a sudden but harmless stop, and also it would make your skin look great.
  - yjftsjthsd-h 5y ago
    This is written in such a way that I kind of think you're being sarcastic, but all that sounds like a great idea, really.
    - minitoar 5y ago
      For the record I was not attempting sarcasm.
      - yjftsjthsd-h 5y ago
        Thanks for clarifying :-) I think the skin care was what really made it ambiguous for me.
  - abootstrapper 5y ago
    I’m not the only one who’s seen Demolition Man, right? https://m.youtube.com/watch?v=RnyhkBU1yaw https://m.youtube.com/watch?v=RnyhkBU1yaw
    - minitoar 5y ago
      Haha nice. Still caused quite a bit of damage to the surrounding area though. My inspiration was more Neal Stephenson I think.
  - roachpepe 5y ago
    Sudden stop is never harmless for a person even if we could eliminate the external mechanical injuries entirely - the brain continues forward and meets the facial bone structure inside the skull, internal organs rupture as they keep moving forward while the skeletal structure stops... Enter the airbag. The airbags inside the car are meant to cushion the hard surfaces of course and the curtain bags are meant to keep people and their limbs in the protective passenger area when the car spins, but also they are acting as a counterforce and slow the speed of the person a little more gently, versus an instant stop to a solid object such as the dashboard, causing internal injuries as well as the external trauma. Also airbags are a very good reason to wear a seatbelt - if you pop the airbags while colliding at relatively slow speeds, you'll probably lean forward a bit from the deceleration only to be punched in the face by the bag (and probably get some vertebrae renovated). So while installing external airbags to cushion the pedestrian impact sounds like a good idea it probably isn't, as the bag suddenly expanding from the direction of the vehicle would simply add to the energy and "punch" the pedestrian away from the car at the 200mph at which an airbag expands. Lastly, I'm all in for the gel from Demolition Man, why aren't we funding it?? Would it come in different scents and colors? :-D Really the car could one day - when detecting an unavoidable collision - spray out a foam or expanding gel that would cushion the surfaces and also decelerate the fall of the pedestrian - I'm thinking Final Fantasy Spirits Within -soldiers drop gel"?
- oblio 5y ago
  https://www.youtube.com/watch?v=cswngk6SomU https://www.youtube.com/watch?v=cswngk6SomU
  - elihu 5y ago
    Interesting. That technology deploys on impact; one could imagine a more optimal version that detects pedestrians with proximity sensors and inflates an airbag before the vehicle even reaches the pedestrian. (Obviously the car could also do automatic braking, but the airbag could help in situations where stopping wasn't possible.) It seems like such an airbag could be used to lessen the impact of vehicle-to-vehicle collisions as well. Perhaps have multiple inflators so the car can select air pressure based on the projected force of impact. Airbag suits are available now for motorcycle riders, external car airbags would kind of be just a larger (potentially more complex) variant of the same idea.
    - VectorLock 5y ago
      Bonus points if it can detect deer and launch them over the vehicle cabin. Deer intrusion is a big safety hazard in some places.
- einarfd 5y ago
  Volvo was putting out a press release (https://www.media.volvocars.com/global/en-gb/media/pressreleases/43844 https://www.media.volvocars.com/global/en-gb/media/pressrele...) in 2012 about pedestrian airbag, so it's a thing.
heavyset_go 5y ago
Because the justice system consistently lets drivers who cause injuries to, or kill, pedestrians with their cars slide. Consequences for injuring or killing pedestrians only seem to enter the equation when serious negligence is involved, like when drivers are intoxicated, or when there is a hit-and-run.
- midasuni 5y ago
  Even then killing with a car is treated far less seriously than otherwise. If you want to murder someone, have a few drinks and drive into them. They’ll be dead and you’ll get kit in a couple of years. Avoid the drinks and you might even get away with it completely.
  - heavyset_go 5y ago
    I went to school with someone who killed another person while driving drunk. They were found guilty and the judge didn't sentence them to serve any time incarcerated.

This looks like a solvable problem, why aren't bumpers/hoods/doors optimized to protect pedestrians and bikers?

by lumost 5y ago

This looks like a solvable problem, why aren't bumpers/hoods/doors optimized to protect pedestrians and bikers?

Pedestrian impact is an explicit design feature in modern cars. That's why bumpers and hoods have the same general shape on nearly every modern car. However, trucks and SUV have become extremely popular. There's only so much you can compensate for when the mass of the car is increased. IIHS is changing tests now to incorporate pedestrian safety tests. NHTSA is also considering the change.

stefan_ 5y ago
There is zero technical reason for trucks and SUVs to have the large hood they do that strikes adult pedestrians center mass (and kids at head level). It's extra comical on the upcoming electronic versions where instead of safe design, you get a "frunk". It's design nonsense and the only reason it ever got this bad is the regulators are fully captured.

i80and 5y ago

New hoods often are, actually — Euro NCAP tests pedestrian collision safety. Notably the VW ID.4 at least has a hood designed to collapse inward in that case; I assume other cars have this feature as well

VectorLock 5y ago

How long until airbag hoods?

minitoar 5y ago
Yeah ideally the whole car upon impact would instantly turn into a big sploosh of medicated gel, safely ensconcing passengers and nearby pedestrians or cyclists and bringing everything to a sudden but harmless stop, and also it would make your skin look great.
- yjftsjthsd-h 5y ago
  This is written in such a way that I kind of think you're being sarcastic, but all that sounds like a great idea, really.
  - minitoar 5y ago
    For the record I was not attempting sarcasm.
    - yjftsjthsd-h 5y ago
      Thanks for clarifying :-) I think the skin care was what really made it ambiguous for me.
- abootstrapper 5y ago
  I’m not the only one who’s seen Demolition Man, right? https://m.youtube.com/watch?v=RnyhkBU1yaw https://m.youtube.com/watch?v=RnyhkBU1yaw
  - minitoar 5y ago
    Haha nice. Still caused quite a bit of damage to the surrounding area though. My inspiration was more Neal Stephenson I think.
- roachpepe 5y ago
  Sudden stop is never harmless for a person even if we could eliminate the external mechanical injuries entirely - the brain continues forward and meets the facial bone structure inside the skull, internal organs rupture as they keep moving forward while the skeletal structure stops... Enter the airbag. The airbags inside the car are meant to cushion the hard surfaces of course and the curtain bags are meant to keep people and their limbs in the protective passenger area when the car spins, but also they are acting as a counterforce and slow the speed of the person a little more gently, versus an instant stop to a solid object such as the dashboard, causing internal injuries as well as the external trauma. Also airbags are a very good reason to wear a seatbelt - if you pop the airbags while colliding at relatively slow speeds, you'll probably lean forward a bit from the deceleration only to be punched in the face by the bag (and probably get some vertebrae renovated). So while installing external airbags to cushion the pedestrian impact sounds like a good idea it probably isn't, as the bag suddenly expanding from the direction of the vehicle would simply add to the energy and "punch" the pedestrian away from the car at the 200mph at which an airbag expands. Lastly, I'm all in for the gel from Demolition Man, why aren't we funding it?? Would it come in different scents and colors? :-D Really the car could one day - when detecting an unavoidable collision - spray out a foam or expanding gel that would cushion the surfaces and also decelerate the fall of the pedestrian - I'm thinking Final Fantasy Spirits Within -soldiers drop gel"?
oblio 5y ago
https://www.youtube.com/watch?v=cswngk6SomU https://www.youtube.com/watch?v=cswngk6SomU
- elihu 5y ago
  Interesting. That technology deploys on impact; one could imagine a more optimal version that detects pedestrians with proximity sensors and inflates an airbag before the vehicle even reaches the pedestrian. (Obviously the car could also do automatic braking, but the airbag could help in situations where stopping wasn't possible.) It seems like such an airbag could be used to lessen the impact of vehicle-to-vehicle collisions as well. Perhaps have multiple inflators so the car can select air pressure based on the projected force of impact. Airbag suits are available now for motorcycle riders, external car airbags would kind of be just a larger (potentially more complex) variant of the same idea.
  - VectorLock 5y ago
    Bonus points if it can detect deer and launch them over the vehicle cabin. Deer intrusion is a big safety hazard in some places.
einarfd 5y ago
Volvo was putting out a press release (https://www.media.volvocars.com/global/en-gb/media/pressreleases/43844 https://www.media.volvocars.com/global/en-gb/media/pressrele...) in 2012 about pedestrian airbag, so it's a thing.

heavyset_go 5y ago

Because the justice system consistently lets drivers who cause injuries to, or kill, pedestrians with their cars slide. Consequences for injuring or killing pedestrians only seem to enter the equation when serious negligence is involved, like when drivers are intoxicated, or when there is a hit-and-run.

midasuni 5y ago
Even then killing with a car is treated far less seriously than otherwise. If you want to murder someone, have a few drinks and drive into them. They’ll be dead and you’ll get kit in a couple of years. Avoid the drinks and you might even get away with it completely.
- heavyset_go 5y ago
  I went to school with someone who killed another person while driving drunk. They were found guilty and the judge didn't sentence them to serve any time incarcerated.