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Designing a Road That Does Not Start at Chainage Zero
This is done by specifying the start chainage value
as the radius of the first PI. |
There are 2 methods available for entering the
horizontal alignment, for this example we will be
using the spreadsheet method to enter the data.
I want my road to start at chainage 105; this
information is entered in the first row under the
radius column.
Once the horizontal alignment has been modified to
start at 105, all dialogs related to this road will
automatically reflect the change.
Coordinate the new road.
Extract cross sections.
The vertical alignment will also automatically pick
up the new start chainage. After entering the vertical
alignment, we need to generate levels.
The next step is to generate edge levels.
This is all that is needed for a new road. If you
have designed a road, and later find that the start
chainage needs to be changed, then the vertical
alignment and edge levels will not automatically shift
the same amount as specified in the horizontal
alignment. The vertical alignment and edge levels will
have to be edited manually. |
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Last Updated:
November 02, 2005
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