To solve a common workflow for Architects that need to make conpect designs of urbanism, it should be very usefull to transform/convert surfaces, street, runway, pads and any terrain adjustment made on INFRAWORKS to editable objects in REVIT. For example, a runway or a street would be converted to a Floor, surfaces to Terrain, and so on...
Because SiteDesigner isn´t working very well and even with much patience and deep care, you need to have a Civil3D file to have the result in SiteDesigner.
With Infraworks integration into Revit we cover the early stages of Conceptual Design.
This is common for Government first estimations of investiment, or Huge Condominium Master Plan.