I have created a road corridor for a site and it has intersections, my corridor has been modelled correctly but when I create the top and bottom surfaces from the corridor, there are steps at various points along the corridor especially at the intersections. I have tried to increase the frequencies at these corridor regions but still, the surface won't model correctly. have also tried editing the surfaces manually by removing some points and swapping edges but nothing seems to work for me. can somebody assist and tell me where am going wrong or what am I missing. Please find the attached drawing, the areas are circled in red.
Thanks
Autodesk Autocad Civil 3D 2018 Version
