To Apply Design Criteria to an Existing Alignment

1. Click the alignment. Click Alignment tabModify panelAlignment Properties drop-downAlignment Properties Find.
2. In the Alignment Properties dialog box, click the Design Criteria tab.
   Note: To use criteria-based design, an alignment must have at least one design speed.
3. In the Design Speeds section, click Add Design Speed.
4. Specify the Start Chainage and Design Speed values.
5. Repeat Steps 3 and 4 to specify design speeds at other chainages.

   An alignment can have unlimited numbers of design speeds, but can have only one speed at any given chainage. When a chainage has a design speed setting, that setting applies to either the remainder of the alignment or the next chainage at which a design speed is set. If a single element has multiple speeds assigned to it, the highest speed is used to validate that element against the design criteria. The lower speed values are ignored.

6. On the right side of the dialog box, select the Use Criteria-Based Design check box.
7. 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: The first design criteria file found in the C:\ProgramData\Autodesk\C3D <version>\eng\Data\Corridor Design Standards\<units> directory is used by default when the criteria-based design feature is used.
   • 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 set from the list.

8. Click OK.
   Note: The entire alignment design is validated when you click either Apply or OK.