Add a free asymmetrical vertical curve.
You specify the length of the curve before the PVI and the length of the curve after the PVI.
The illustration shows an asymmetrical curve between tangents 1 and 2, with curve lengths 3 and 4.
To add a free asymmetrical vertical curve
- Click the profile. Click Profile tab
Modify Profile panelGeometry Editor
. - On the Profile Layout Tools toolbar, click
Free Asymmetrical Parabola (PVI Based). - In the profile view, select a location near the PVI to which you want to add a curve.
- Specify the length of the curve before the PVI by entering a value or by selecting two points in the drawing window.
If the first length you specify is too large for the asymmetric curve, you cannot enter the length for the second curve. The length of the first curve must be less than the station distance between the PVI you select and the station value of the previous PVI (or end station of the previous curve.)
- Specify the length of the curve after the PVI by entering a value or by selecting two points in the drawing window.
Note
If the profile was created using the criteria-based design feature, a default value is displayed on the command line. Minimum K values at given design speeds are specified in the design criteria file . Minimum curve length and radius are calculated from the minimum K value at the current design speed.