Once you have completed the download and installation, you will unlock several high-level features:
The Bridge Modeler for Civil 3D isn't a replacement for Revit or InfraWorks, but it is the best tool for integrated directly into your corridor model. It stops the data loss that happens when exporting LandXML files back and forth. Bridge Modeler Civil 3d Download
: The standalone Bridge Module was discontinued starting with Civil 3D 2018 Modern Workflow Once you have completed the download and installation,