2.0

Creating the Roadway Superelevation with Templates and Cross Sections
363
This information is for reference only. You cannot edit it through the
Superelevation editor.
5 Use the Curve Edit Information section of the dialog box to edit the following
basic superelevation data:
n
Starting and Ending Stations: The default to the starting and ending
stations of the circular curve, but can be edited. Superelevation can begin on
the tangent sections.
n
Method: This list displays the superelevation methods available with Civil
Design. For more information, see Superelevation Methods in this chapter.
n
E value: The maximum crossfall value for the fully superelevated template.
This value is initially set the project default setting unless speed tables were
used to create the horizontal curvature, in which case the speed table value is
used.
n
Direction: Curvature can be either right or left, and is based on curve
direction of the alignment. The direction of curvature should not be edited
unless you insert curve information manually.
n
Rollover: To apply rollover to the template, select Rollover and enter the
rollover percent grade in decimal form. For example, type a six percent grade
as .06. This grade is the maximum difference between the fully superelevated
road surface and the shoulder. The shoulder is represented by the rollover
points you select when you edit the template to define the superelevation
regions.
6 Set the transition in and out of the curve.
Each transition has a runout and runoff value, and a percentage of runoff. The
percentage of runoff is the amount of runoff length that occurs before the
actual curve is encountered.
These values are initially set to the project default settings for superelevation
parameters. However, if speed tables were used to create the horizontal
curvature and spirals were used, the runoff value is set to the spiral length and
the percentage runoff is set to 100%.
7 Move between the curves by doing any of the following:
n
Click Next to move to the next curve.
n
Click Previous to move to the next curve.
n
Click Curve # to view information for a specified curve. This option displays
a dialog box that prompts for the number of the desired curve. Enter the
number of the curve to edit. Curves are numbered sequentially based on
station sequence. If you enter a number that is outside the range of curve
numbers, an error message is displayed, stating Curve not found. Click OK
to return to the Superelevation Curve Number dialog box.
n
Click Station to view information for a curve that falls on an entered station.
This option displays a dialog box that prompts for a station. Enter a station
value that lies between the defined beginning and ending station of the
superelevation. If you enter a station that does not lie within a superelevated
area, an error message appears. Click OK to return to the Station dialog box.
NOTE
The station entered does not have to lie on the curve itself. The
superelevation can start before the curve. The Station command uses the
stations defined as the beginning and ending of superelevation to
determine which curve is to be displayed. For more information, see the
Superelevation Curve Edit dialog box.