Tilted Plane in ORD

Not that I am aware of - I have worked around this by making a terrain to represent the tilted plane, and draping.

As Mark suggested only way to create a tilted plane is to create horizontal geometry around the area needed and the create the vertical gradients needed for the tilt. Set these verticals as active then add to a terrain using Terrain from element.

Then to Section in to your profile use quick profile from surface to add the tilted plane to your vertical design. 

This is how I do roundabout design in ORD and have built it into my own Roundabout Civil Cells