Vertical Alignment (Get Started)

1. click the item in HDS main toolbar.

2. You show a dialog which has the vertical alignment input spreadsheet.

- STA : station of PVI (point of vertical intersection)
- PVI : elevation of PVI.
- Length-L1 : distance from BVC to PVI on x axis.
- Length-L2 : distance from PVI to EVC on x axis. If vertical curve is symmetrical curve, L1 equals L2.