Perform vertical curve alignment
Click on the vertical curve computation
icon
from the toolbar to calculate the
vertical point of curvature (PVC,
) and the vertical point of
tangency (PVT,
) of each vertical curve. The PVC, PVT and PVI (point
of vertical intersection,
) points are identified on the graph with
different marker. If PVT and PVC of adjacent curves overlap, an error message
will display as shown in Figure 11(a). Clear current design and redesign a new
vertical curve. Computed sample vertical curve is displayed in Figure
11(b).
Tips: Clear vertical curves (edit-clear
curves) before modifying PVI points. Use left mouse to click and drag the PVI
point to a desired location.
Figure 11(a) Vertical curves overlap
Figure 11(b) Vertical curve
design
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