Re:Tempe Police Release Video of Uber Accident
by InclinedPlane on Wednesday March 21, 2018 @09:05PM
(#16644449)
40mph is actually right at the inflection point where survivability changes dramatically. At 40mph it's about a 50/50 chance of a car crash with a pedestrian causing a fatality. At 35mph the chances of a fatality go down to 1 in 3, at 30mph it goes down to 1 in 5. At a little under 20mph it's 1 in 10.
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Re:Tempe Police Release Video of Uber Accident
by dmix on Wednesday March 21, 2018 @09:12PM
(#16644508)
Okay, I've heard that 40mph plenty of times here when AI cars come up, so is it possible the car could have slowed down 10mph? I only suggested 10km/hr as an ideal maximum (aka 35mph) given better technology, not as a baseline for today...
I've also read that the last speed sign was 45mph before this accident. I used 40mph as it was between the 35mph sign that was coming up before the hit and the 45mph one before it.
Re:Tempe Police Release Video of Uber Accident
by InclinedPlane on Wednesday March 21, 2018 @09:45PM
(#16644762)
Braking time is about 4 seconds from 40 mph (average braking acceleration is a bit under half a gee for ordinary cars), which means every second of braking is a roughly 10 mph reduction in speed.