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Table Of Contents
Chapter 3 Working with Profiles and Vertical Alignments
196
Moving the Point of Vertical Intersection for the
Finished Ground Centerline
You can move the PVI (Point of Vertical Intersection) of a vertical alignment by
using the Move PVI command.
If you use this command after you design a vertical curve, then the command
leaves the vertical curve and any labels in their original positions. Erase the
vertical curve, and then recreate it with the Vertical Curve command. For more
information, see Working with Vertical Curves for the Finished Ground
Centerline in this chapter.
To move the point of vertical intersection between two tangents
1 From the Profiles menu, choose FG Centerline Tangents ä Move PVI.
2 Select the tangents around the PVI you want to move.
Select these tangents in any order, and then press ENTER to continue the
command. The following prompt is displayed:
Station/Elevation/Both/Pick <Pick>:
3 Select one of the following methods of moving the PVI:
n
Press Enter to accept the default Pick and select a new point for the PVI.
n
Type S to enter a new station. This option maintains the existing PVI
elevation.
n
Type E to enter a new PVI elevation. This option maintains the existing PVI
station.
n
Type B to enter both a new station and elevation for the PVI.
4 Enter the station and/or elevation according to the keyword option you use.
The command holds the start point of the first tangent and the endpoint of the
second tangent. It modifies the grade values of the tangents for the change in
PVI location.
The following illustration shows moving a PVI:
Moving the PVI