Not to mention a tapered cylinder is as simple as circle, pull, scale. [image: hyJP_Taper.gif]

Thank you both! @dave r said: Edit: I just zipped this out in SketchUp but if I were doing it for a job, I would do the dimensioning in LayOut.

Pilou, thank you for the help you provided, but unfortunately I don't speak french and wasn't able to understand a lot from Didier's guide, or from the french subforum. Are you kind enough to make a video out of Didier's guide, if I don't ask too much? Or maybe using the Boolean method which I didn't quite understood what you mean by that. Also I would like to know how can you intersect 2 roads that have different width, and they intersect up on a hill, for example. Your help is much appreciated, thanks again.