I have a 3d GIS shapefile (detailing a road layout) with data attached (traffic flows, etc) that I would like to bring in to Revit. Is this possible?

Using Autodesk map3d I have converted the file to a .dwg with object data attached. However, when I insert this into a revit drawing, it is loaded as a 'symbol'. The entire layer appears in fixed form; I cannot edit shapes nor data for individual lines within the layer.

I have to admit being new to BIM but I thought the point was smart object orientation, with data attached. Is there a way to make use of my data in this way - editing shapes, editing data and generally interfacing with the 'information management' features of BIM?