7.4 Longitudinal profile
Changes in gradient, either convex or
concave, must be made using vertical radii
adequate for the performance of the cars. In
general, changes in gradient should be
avoided in high speed braking or curved
sectors or where acceleration is strongest.
The gradient of the start/finish straight should
not exceed 2%.
7.5 Transversal inclination, drainage
Along straights, the transversal incline, for
drainage purposes, between the two edges of
the track or between the centreline and the
edge (camber), should not exceed 3%, or be
less than 1.5%.
In curves, the banking (downwards from the
outside to the inside of the track) should not
exceed 10% (with possible exceptions in
special cases, such as speedways). An
adverse incline is not generally acceptable
unless dictated by special circumstances, in
which case the entry speed should not
exceed 125 kph.
Any variation in transversal incline,
particularly along the entry and exit sections
of a planimetrical curve, should have
adequate altimetrical transitions, based on
the trajectory and on consideration of point
7.4.
Systems for adequate drainage of water from
the track, pit lane, paddock and public areas
should be treated as a priority in the planning
stage.
