2.0

Working with the Vertical Alignment Tangents for the Finished Ground Centerline
195
Changing the Grade Coming Out of the PVI for
the Finished Ground Centerline
To edit the grade going out of the PVI for a finished ground tangent, use the
Change Grade 2 command.
To change the grade coming out of the PVI for the finished ground centerline
1 From the Profiles menu, choose FG Centerline Tangents ä Change Grade 2.
2 Select the tangent that represents the grade coming into the PVI.
3 Select the tangent that represents the grade coming out of the PVI. This is the
tangent that will have its grade modified.
The following prompt is displayed:
Grade coming into PVI:
4 Either select the tangent going into the PVI or type the grade of the tangent.
The following prompt is displayed:
Grade coming out of PVI:
5 Enter a value for the new grade out in percent, but dont enter the % character.
6 Select another tangent to continue the command, or press ENTER to end the
command. The command holds the endpoint of the second tangent, as well as
the start point and grade of the first tangent. It applies the new grade to the
second tangent, calculating the new intersection point with the first tangent to
determine the location of the PVI and draws a new tangent based on the grade
you entered. The new second tangent is extended until it intersects with the
grade defined by the first tangent. This intersection is the location of the new
PVI point.
If you use this command after you have added design a vertical curve to the
PVI, 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.
The following illustration shows the new location of a PVI after you change the
grade out:
Changing grade out