2.0

Designing and Editing Roadway Ditches with Templates and Cross Sections
379
The Control option uses a screen similar to the one used by the Edit Design
Control command, except that here it only affects the current station. Another
difference is that profiles and alignments cannot be attached in this screen. You
can make edits to the template, ditch, benches, or slope control.
Designing and Editing Roadway Ditches with
Templates and Cross Sections
To design and edit ditches, use the View/Edit Sections command on the Cross
Sections menu. With this command, you can change the control, slope,
elevation, width, offset, and depth of a single section of a ditch. Use the Design
Control ä Edit Design Control command to change a range of sections.
Changing the Ditch Control
You can make changes to a single section or a range of sections. Generally, you
use the View/Edit Sections commands to change single section and use the Edit
Design Control commands to make changes to a range of sections.
To change the ditch control for one section
1 From the Cross Sections menu, choose View/Edit Sections.
2 View the station at which you want to make the edits by choosing the Sta
option at the command prompt, and then entering a station value.
3 Type E for Edit to access the editing options.
The following prompts are displayed:
Sta: 0+000 Section Edit & Display commands
Actual/Control/Ditch/Id/eXit/Transition/Undo/Zoom <eXit>:
NOTE
Any changes made using this option only affect the current station. To
make changes that affect a whole range of stations, use the Edit Design
Control command.
4 Type C for Control to display the Control Editor dialog box.
5 Click Ditches to display the Ditch Control Dialog box.
6 In the Type list, select the ditch type for each side.
7 Define the ditches using foreslope and centerline offset, or one of these two
parameters with either depth or base elevation.
8 Select or clear the foreslope, centerline offset, depth, depth from hinge, or base
elevation check boxes. Enter each value in the edit box to the left of the check
box:
n
Foreslope: Enter the slope from the template connection point to the ditch.
n
Centerline Offset: Enter the distance from the centerline to the inner edge
of the ditch.
n
Depth: Enter the vertical distance of the ditch, which can be measured from
either the top of the foreslope or the finished ground reference point of the
template. Enter the depth of the ditch as a positive value.
n
Depth from Hinge: This check box is used in conjunction with the Depth
value and is only available after you have selected the Depth value.