2.0

Table Of Contents
Modifying Design Control
341
that the vertical transitions and ditches acquire their unique numbered
definitions.
n
For transitions to be applied to the template, the appropriate transition
regions must have been defined on the template using the Edit Template
command.
Attaching the Subgrade Vertical Alignments to
the Cross Sections
You can also draw, define, and attach a vertical alignment to the template
subgrade surface apex. The profile does not support subgrade profile definitions,
but you can use one of the 16 available transition profile definitions if its not
being used to control a template transition point.
Draw this alignment for the elevation at the apex of subgrade. Define this
alignment as a numbered transition line. To attach the alignment, select the
Attach Profiles button. A dialog box displays and you can select the subgrade
alignment. You must remember the transition number you used when you
defined it.
Modifying Design Control
To apply design control to the cross sections, you first need to use the Edit
Design Control command. When you use the Edit Design Control command,
you make edits through the Design Control Editor.
You can use the Edit Design Control command to make changes to a range of
stations. When you do this, the values that appear in the dialog are for the first
section in the selected range and dont necessarily apply to the entire range. For
example, if the ditch elevations were attached from the profile, each sections
ditch elevation would be different but only the elevation for the first section in
the range would be displayed. Therefore, to edit the ditch elevations for the
appropriate section, use the View/Edit Sections command.
When you are using the Edit Design Control command, only the parameters
that you change are reapplied to every section in the specified range. For
example, if you only wanted to change the ditch width, you would select the
Edit Design Control command, specify the station range, then select the Ditch
option and type in the new width value. When you click OK to exit the
command, the program determines the parameters that you have changed and
modifies the sections accordingly.
In this example, it changes the ditch width then recalculates the match slopes
based on the new width. However, the ditch elevation remains as it was before
this command was executed, since you did not change it in the dialog box. This
is an important point to understand when working with Edit Design Control
and View/Edit Sections commands. Because of this, any edits you make to the
ditch elevation at individual stations with the View/Edit Sections command are
not overwritten.