To Create a Rail Alignment from Objects

1. Draw one or more lines, curves, or polylines in the drawing.
2. Click Rail tab Alignment panel From Objects .
3. Select the graphic entities and press Enter.
   Note: Enter XREF at the command line to select entities from within the xref drawing. See AutoCAD Help for more information about external drawing references.
4. Press Enter to accept the alignment direction or enter R to reverse the direction.
5. In the Create Alignment - From Objects dialog box, enter a unique name for the alignment.

   The default alignment Type is set to rail by default.

6. Enter an optional description.
7. Enter a starting station value.
8. On the General tab, specify the following settings:
   • Site

     Specify a site with which to associate the alignment or accept the default <None>. For more information, see About Sites.

   • Alignment Style
   • Alignment Layer
   • Alignment Label Set
9. Under Conversion Options, specify whether to add curves between tangents, the default radius value to use, and whether to erase the existing entities.
10. If you want to apply design criteria to the alignment, click the Design Criteria tab and specify a Starting Design Speed to apply to the alignment starting station.

    This design speed is applied to the entire alignment. Additional design speeds can be applied at other stations after the alignment has been created. For more information, see To Change Alignment Design Speed and Design Criteria Properties.

11. To associate design standards with the alignment, select the Use Criteria-Based Design check box.

    On the Design Criteria tab, specify the following settings:

    • Use Design Criteria File

      Select this check box to associate a design criteria file with the alignment. The default design criteria file location and the Default Criteria properties become available when you select the check box.

      Note: For rail alignments, the first design criteria file found in the following folder is used by default when the criteria-based design feature is used.

      • Rail alignments: C:\ProgramData\Autodesk\C3D <version>\enu\Data\Railway Design Standards\<units>
    • Use Design Check Set

      Select this check box to associate a design check set with the alignment. The design check set list becomes available when you select the check box. Select a design check from the list.

12. Click OK.