# To export LandXML string roads from Autodesk Civil 3D

Use the LandXML export function in Autodesk Civil 3D to export corridor baseline alignments, along with associated feature lines. The Trimble Access Roads software reads the alignment and feature lines to create a road where the names of the feature lines are the name of the strings in the road. If required, you can include points and surfaces in the file.

If you haven't already done so, you will need to extract feature lines from the corridor key point codes before you export the LandXML file from Autodesk Civil 3D.

## Extracting corridor feature lines

1. Start Autodesk Civil 3D and open the corridor drawing.

2. From the Home ribbon, select Create Feature Line From Corridor from the Feature Line drop down list.

3. Select the corridor.

4. Select the feature lines.

5. Press Enter.

6. In the Extract Corridor Feature Lines window, select the feature lines to extract. For complex projects containing multiple corridors, select the site from the Site column.

   For complex projects containing multiple roads, you must use sites where each site has the alignment and associated feature lines for just one road. If, when the roads were created, the alignments and feature lines were not placed in separate sites, you can create a new site for each road and then move these objects to the appropriate sites. Make sure that when you move the feature lines to a site they are the ones that are relevant to the alignment in that site. When exporting the LandXML file, you will select the site that contains the appropriate alignment and feature lines. To learn more about sites, refer to the Autodesk Civil 3D help.

7. Tap Extract.

## To export LandXML file from Civil 3D

1. From the Output ribbon, select Export to LandXML.

2. Select Edit LandXML Settings, and for the Alignment Export Settings set the Export Cross Sections option to Off.

3. Specify the alignment and feature line objects to export. If you moved the alignment and associated feature lines to a unique site (which is important for projects with multiple roads), select from that site.

4. Tap OK and enter a file name.

5. Tap Save.

For more information, refer to the Autodesk Civil 3D Help.