Plan Elements

I have a question on the recommended workflow for creating proposed elements to appear on plan sheets.  I have elements that were generated from the corridor, and I placed a civil cell to define an intersection.  While the corridor elements are clipped in the 3D model they are not on the 2D view.  Are most of you drafting the elements in a separate .dgn file to reference in?  That was the procedure I followed in InRoads SS2.