Modifying the vertical geometry
The vertical geometry can be modified with the same tools as the horizontal geometry. However, the assumption is that the final result does not include transition curves, such as clothoids.
The modification steps for going from a preliminary vertical geometry to the final geometry may include in some order the steps listed in the next three Sections.
Basic workflow
1. Change circular arcs to lines.
Tools / Remove arcs with large radius
2. Break-up curved sets with a change in the sign of curvature.
3. Join circular arcs with similar radii.
Tools / Join arcs with similar radii
Done repeatedly during the basic workflow
1. Refit the line components.
Regression / Refit selected lines
2. Refit individual circular arcs.
Regression / Refit selected components as arc
3. Refit the lengths of all components.
Regression / Refit component lengths
4. Find an alternative set of components for a segment of the geometry
Tools / Fit alternative components
Finalizing
In the very last part of the geometry modification process, the radii of the circular arcs can be changed to desired values.
