1.1.4.2 Vertical Segments

Vertical alignment can be specified by defining one or more Elevation Point objects along the horizontal line.

Parameters for Vertical Segments

Example

Four elevation points are specified below using Elevation Point objects. The objects must be specified in order (station ascending). A parabolic curve is fit between the Elevation Point objects to create the vertical profile of the alignment.

<O N="Begin" T="Elevation Point">

<P N="Station" V="0" />

<P N="Grade" V="0.3" />

<P N="Elevation" V="50" />

</O>

<O N="VPC_1" T="Elevation Point">

<P N="Station" V="300" />

<P N="Grade" V="0.3" />

<P N="Elevation" V="140" />

</O>

<O N="VPT_1" T="Elevation Point">

<P N="Station" V="700" />

<P N="Grade" V="-0.3" />

<P N="Elevation" V="140" />

</O>

<O N="End" T="Elevation Point">

<P N="Station" V="1000" />

<P N="Grade" V="-0.3" />

<P N="Elevation" V="50" />

</O>