i think I didn't explain myself well.
I attached the longitudinal section of ramp-13 (one of the ramps in a designed interchange project. The upper surface is the existing elevations of the ground surface from a based grid map that I created based on .dxf file.
Now I need to add the red line (the designed elevations along the same cross section. You can see clearly what I mean if you take a look on the .dxf file of the longitudinal ramps, (please find Ramp-13 in this file).
I need this in order to see clearly the cut and fill areas on the lithology section.
I hope know you can understand my goal. Thanks in advance