Use the following set
of variables to calculate transition distances.
||The full superelevation rate. This rate is determined
from the superelevation rate table, based on the design speed and
||The value that is read from the transition length tables,
based on the design speed and the curve radius. In most cases, such
as AASHTO, this is the transition length value from Level Crown
to Full Superelevation. However, this value may not be an actual length,
but some other value, such as a transition rate from which the length
can be calculated.
||The unsuperelevated normal lane slope (positive). This
value is defined by the user in the Calculate Superelevation - Lanes Page.
||The unsuperelevated normal shoulder slope (positive).
This value is defined by the user in the Calculate Superelevation - Shoulder Control Page.
||The normal width of the traveled way. This value is defined
by the user in the Calculate Superelevation - Lanes Page.
||The length of the spiral, if a spiral is involved in
the transition. This is the actual length of the spiral element
in the curve group.
||The fractional part of the transition length before the
start of the curve or after the end of the curve.
||The rate of increase of centripetal acceleration traveling
along a curve at a constant speed.
The variables in the
previous table are used to calculate the following:
The following table describes