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Chapter 4 Working with Cross Sections
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This dialog box has buttons you can select to attach defined horizontal
alignments as transitions, ditches and rights-of-way.
4 Click the button indicating the horizontal alignment transition to attach.
The command changes to the AutoCAD graphics screen and prompts for the
selection of the alignment to be attached. The wording of the prompt depends
on the transition to be attached. For example, if you selected the One button on
the left side of the dialog box, the following prompt is displayed:
Select first left offset alignment:
You can either select the alignment graphically, or press ENTER and select the
alignment from the Alignment Librarian dialog box. Select a numbered button
to attach a transition line to the numbered transition control point on the
template. Selecting the One button on the right side, for example, attaches the
alignment you select in the next step to the first transition control point on the
right side of the template. ROWs and Ditches are separate because they are not
defined as part of the template.
5 Select the alignment to attach.
The Attach Alignments dialog box is redisplayed.
6 Select another transition to attach, or click OK to exit the dialog box.
7 Click OK from the Design Control dialog box to process the sections.
The Process Sections dialog box is displayed.
8 Click OK to exit the command after the sections are processed.
The offsets at each sampled cross section are calculated from the horizontal
alignment and stored.
NOTE
You can turn off an attached alignment using the check boxes in the
Transitions dialog box.
The transitions are not dynamically linked to the editor. If you make any
changes to an attached alignment, you must re-attach it using the Attach
Alignments option.
Attaching the Vertical Transitions to
Cross Sections
Using the Design Control dialog box, you can also attach vertical transitions to
the cross sections. These profiles can represent ditches, subgrade surfaces, or any
of eight transition regions. For more information, see Using Ditch or
Transition Profiles When Processing the Cross Sections and Attaching the
Subgrade Vertical Alignments to the Cross Sections in this chapter.
Prerequisites for Attaching the Vertical
Transitions to the Cross Sections
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Before you can attach a vertical transition line, you need to draw and define
it using the Ditches and Transitions section of the Profile menu. Set the
current layer, draw the alignment, and define the alignment. This is the way