P Turn design in MxRoad

Dear Designers,

Has anyone performed P Turn design before? I'm trying to model a P Turn design in MxRoad. Unfortunately, i cant model the entire P Turn design. Without proper modeling, i'm unable to generate earthwork around the design. Can anyone help me on this please. The P Turn design file and survey file is attached for your reference.

Ref P6.dwgSurvey1.dwg