Re:Self-driving Uber car kills Arizona woman crossing street
by Spare_account on Monday March 19, 2018 @07:47PM
(#16624531)
I wasn't aiming to call you out, as such. I just wanted to air my opinion, but thank you none the less for providing some sources :-)
The 45 feet from 30mph is a common figure (the UK government's Highway Code uses it as well).
The cars I tested are normal cars, but I concede I had good tyres and I always choose smooth roads to test on. Once you include:
1. Driver ability
2. Vehicle quality
3. Road quality
4. Prevailing conditions
5. 4 passengers plus luggage
I guess you can explain the difference.
http://www.government-fleet.com/content/driver-care-know-you...
http://www.brake.org.uk/facts-resources/15-facts/1255-speed
Car and Driver did a test with sports cars and profesional drivers and came up with 142 - 155 ft from 70mph, while my first reference quotes 245 ft (around 40% less, so extrapolating, their stopping distance from 35mph would be around 20 feet).
https://www.caranddriver.com/features/rocket-sleds-the-best-...
The average car on the road is not a sports car with performance tires and is not stopping on a clean, dry track. So I don't think it's a stretch to assume that an average car on average roads with tires optimized for tread life would be 40% worse than a $100K sports car with $400 tires that are optimized for grip rather than lifetime.