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Table Of Contents
Superelevating Compound and Reverse Curves
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10 Under Transition Out, you can enter any values for Runout, Runoff, and %
runoff.
11 Click OK to exit the Superelevation Curve Edit dialog box.
12 Click OK to exit the Superelevation Control dialog box.
13 Click Yes to save your changes.
For information on superelevating reverse curves that are separated by tangents
or spirals, see Superelevating Reverse Curves Separated by Tangents or Spirals
in this chapter.
The following shows the settings to superelevate reverse curves in the
Superelevation Curve Edit dialog box:
Example of Superelevating Reverse Curves
Separated by Tangents or Spirals
If you are working with reverse curves where the point of tangency (PT) of curve
1 is not the same station as the point of curvature (PC) of curve 2,
superelevation is not applied correctly in the transition between curve 1 and
curve 2. This situation may occur when a tangent or spiral separates curve 1
from curve 2.
You can modify the End Station of curve 1 and the Start Station of curve 2 to
match, resulting in an accurate superelevation. If you modify the Start and End
Stations of the curve data in the Superelevation Curve Edit dialog box, then the
horizontal geometry of the alignment definition is not affected. The data in this
dialog box is for superelevation purposes only.