Ramp between a field path and a road, slope automatically gen. to surface

[Karsten]

Hi CAD-Pros,

I have a terrain model triangulated with CADTools.
I would like to plan a ramp between a field path and a road, with the slope automatically adjusted to the terrain model.

I tried "Create 3D alignment," "Profile 3D polyline," and "Create Longitudinal Features." However, the result was never as described in the help.
The ramp should also transition from a (in Germany so-called) "trumpet" to a fixed width at the top of the road at its beginning (is this possible?).

However, with "Create Longitudinal Features," I always only got cuts from the slope and not any embankment.
When I set the negative values ​​to positive, I received a message that they must be negative.

When I use "Create 3D alignment," the result in the help file looks almost exactly what I'd like, it fails because of the horizontal and vertical line selection.
I always get the message that the selected line isn't a 3D polyline.

I really don't know what I did wrong.
Attached pictures, the DWG and the surface-file.
Maybe someone here has a solution or knows what I did wrong.

Greetings from Germany
Karsten Franke

[Lars]

Hi,

When you create your profile line (a 2D polyline) in the frame you should snap to the start point of the polyline to left vertical frame (start at station zero). Draw the polyline by toggling between "L" and "A" to get a smooth profile line. You don't need to draw any further then station 26,56. You can end your profile at that point.

Now use CadTools command "Convert, Polylines to 3D Polylines) to convert your profile line to a 3D polyline. Now it's time to transmitt your profile vertical data to same line that was used as an horisontal alignment when you created the profile frame. Use the "Create 3D Alignment" command, Follow the instructions in AutoCAD's command window.

1. Select the frame
2. Select your horisontal Alignment (3D Polyline)
3. Select your vertical alignment in the profile frame (the 2Dpolyline that you converted to a 3D Polyline)
4. Now you should get a question if you want to keep your original line in the drawing. Yes will replace your original horizontal 3D alignment with the new, no will keep both in same position (you need to figure out witch one to use later since they only differ in elevation in your last part station 21 to 25)

Hope this helps!
/Lars

Cut the final horisontal 3Dalignment to only use the part you need. If you need to edit the profile later, create a new profile window based on the part you need.