Delete Interpolated Points
This option will erase Interpolated points from the selected string.
When a road longsection and/or cross sections are extracted, points at even chainages are interpolated on the
centreline and also cross section points are interpolated at the end of each cross section.
If you want to change the horizontal geometry, you will probably want to remove the interpolated points and re-create the longs and cross sections
Select the Sring and then choose this option.