How to build a street gradient with a curve (Avoiding rotation) i'm new. I want to build a street, which follows a curve. The street has a 270° curve with gradient.
Here a picture to illustrate it:


The picture show also my problem. The street rotates on the second end.

How can i avoid this effect?
You can twist the curve points using Ctrl+T :



Or you can use the Z up curve option :