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
According to the ODOT Driver Manual, 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...