By the Transparent Command SSE
1/23/2018
Jerry Bartels of Autodesk demonstrates how to use the transparent 'SSE command to quickly locate points and draw a projected line within an existing profile view based on a surface and alignment in plan view.
From the Jerry's YouTube Channel.
and the Civil Immersion blog.
Comments
The Transparent commands in Civil 3D may be the best thing since sliced bread or Starbucks coffee depending on your vices.