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Table Of Contents
Chapter 4 Working with Cross Sections
398
original definition then redefine the alignment. You can also import these lines
strictly for plotting purposes.
If the outer edge of the superelevation region on the template was also defined
as a transition point, then you can also import the left and right superelevation
profiles onto the appropriate transition layers.
NOTE
The import lines are drawn as straight line segments between each section
station. For horizontal alignments it may be necessary to replace some lines
with arc segments.
Importing a Ditch or Transition from the
Sections into a Profile
To import a vertical transition or ditch line using information from the defined
cross sections, use the Import Profile command. You can import any of the
finished ground transitions or ditches as well as the left and right superelevation
lines (LS and RS).
There are a couple of prerequisites to using this command, depending on
whether you want to import ditch or transition lines:
n
If you are importing a transition line to plan or profile, the transition must
have been defined on the template with the Edit Template command.
n
If you are importing ditches, then the ditches must have been applied to the
with the Edit Design Control command.
To import a ditch or transition profile
1 From the Cross Sections menu, choose Ditch/Transition
ä
Import Profile.
2 Specify whether you want to import the left or right profile.
3 Select a vertical transition or ditch line.
The type of prompt that is displayed depends on which profile is selected (right
or left). For example, the following prompt is displayed if the left profile is
selected:
Left profile to draw (Ditch/Super/1/2/3/4/5/6/7/8):
You are not limited to just importing transitions that were attached to the
sections with the Edit Design Control command. You can import any of the
eight transitions if they have been defined as part of the template with the Edit
Template command. If the sections have been defined with ditches, then the
ditch option can be used to import the profile.
You can also import the outer edge of the superelevation region, but since the
profile does not directly support superelevation definitions, you need to import
it to a transition layer. You should select the transition that has been defined at
the same location as the outer edge of the superelevation region.
4 Enter the beginning and ending stations.
The transition, ditch, or superelevation is then drawn on the profile as straight
line entities between sections on the layer specified with the profile EG Layers
and FG Layers commands.