-=> Quoting Gregory Procter to Kevin Fletcher <=-
 KF> i believe it means degrees of curvature per 100 feet ( just
 KF> like measuring inclines )
 GP> Thanks for the reply Kevin, your comment in brackets
 GP> surprised me though. I thought US gradients were normally
 GP> measured as (X) percent, as in 1 foot rise in 100 feet
 GP> equals 1%. Is it the "change in gradient" measured in
 GP> degrees? and if so, what is a "normal" figure?
        Gradients are measured in percentages in the USA.
(Some employee timetables show the ruling grade between
stations in feet per mile...52.8 is 1 per cent, which is
usually considered something to be avoided if possible but
which is not prohibitive.)
        It would also be 1 in 100 according to the system
used in Great Britain (and in countries following the
British tradition?).
        You are correct in your earlier assumption about
what a degree means in measuring curves, but I still haven't
been able to find the applicable distance against which
they are measured.
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