Exporting Civil 3D data to AutoCAD allows you to:

1. Share data with teams using AutoCAD
2. Use AutoCAD tools for editing or drafting
3. Integrate Civil 3D data with other AutoCAD projects

To export Civil 3D data to AutoCAD:

1. Go to the "Output" tab
2. Click "Export" > "AutoCAD DWG"
3. Select the data to export:
- Alignments
- Profiles
- Pipe networks
- Grading
- Surfaces
- Parcels
4. Choose the export options:
- DWG version
- Coordinate system
- Units
5. Click "Export"

Civil 3D will export the selected data to an AutoCAD DWG file, preserving the original geometry and design intent.

Benefits of exporting Civil 3D data to AutoCAD:

1. Streamlines collaboration with AutoCAD users
2. Enables editing and drafting in AutoCAD
3. Supports integration with other AutoCAD projects
4. Preserves data accuracy and integrity

Note: Ensure compatibility between the Civil 3D version and the target AutoCAD version.