About Exchanging Data Between AutoCAD Civil 3D and Autodesk InfraWorks 360
You can bring Autodesk InfraWorks 360 data into AutoCAD Civil 3D by referencing a local InfraWorks 360 model or an IMX file that was exported from InfraWorks 360. You can bring AutoCAD Civil 3D data into InfraWorks 360 by linking to an AutoCAD Civil 3D DWG file as a data source.