On Sun, Feb 22, 2004 at 02:23:38PM -0800, Paul Johnson wrote:
On Sun, Feb 22, 2004 at 05:20:48PM +0000, stephen parkinson wrote:
assume perfect driver, what is difference in stopping distance 30mph cf
35mph
According to the ODOT Driver Manual[1], page 39 (in the PDF, 33 on
printed page), you add another 80 feet to your stopping distance going
from 30 to 40 MPH. I also learned that Oregon's speed limit silently
raised from 65 to 70 MPH in this edition of the driver's manual...
The UK's Highway Code calculates stopping distances from the equation:
d = v + 0.05(v^2) (d in feet, v in mph)
which gives an increase, from 30mph to 35mph, of 21 feet 3 inches - so
the advert's claim is 3 inches short :-)
It also gives you "fudge factors" of x2 for wet and x10 for icy
conditions. Doesn't give you one for locking the wheels though...