Re: Emergency braking and bird anatomy [was: Re: DVD copying and CSS]
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On Mon, Feb 23, 2004 at 07:22:10PM +0000, Pigeon wrote:
> 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...
Well, that explains ODOT's numbers. According to NOAA, 97% of the
United States gets fewer cloudy days. And it takes a day or so for
the wet roads to dry out in the lanes without sunlight, and we get
more rain than Seattle.
- --
.''`. Paul Johnson <baloo@ursine.ca>
: :' : http://ursine.ca/
`. `'` proud Debian admin and user
`- Debian. Because it *must* work.
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