Exercise 1: Calculating Superelevation for an Alignment

In this exercise, you will calculate superelevation for all the curves in an alignment.

To calculate superelevation for a curve

1. Open Align-Superelevation-1.dwg, which is located in the tutorials drawings folder.
2. Select the alignment.
3. Click Alignment tab Modify panel Superelevation drop-down Calculate/Edit Superelevation Find.

   A dialog box indicates that the alignment does not contain superelevation data.

4. Click Calculate Superelevation Now.

   In the Create Superelevation dialog box, the Roadway Type page contains options for how to apply superelevation to various types of roadways. Conceptual graphics illustrate the point about which each lane will pivot.

5. Select Undivided Crowned.
6. In the Pivot Method list, select Center Baseline.
7. Click Next.

   The Lanes page contains specifications for the number, width, and slope of each lane.

8. Specify the following parameters:
   • Symmetric Roadway: Selected

     This specifies that the same parameters are used for both sides.

   • Number of Lanes Right: 1
   • Normal Lane Width: 6.000m
   • Normal Lane Slope: -2.00%
9. Click Next.

   The Shoulder Control page contains specifications for how the roadway shoulders behave when the lanes are superelevated.

10. Under Outside Edge Shoulders, specify the following parameters:
    • Calculate: Selected
    • Normal Shoulder Width: 5.000m
    • Normal Shoulder Slope: -5.000%
    • Low Side: Breakover Removal
    • High Side: Match Lane Slopes
    Note:

    The Inside Median Shoulder options are disabled because you selected an undivided roadway type on the Roadway Type page.

11. Click Next.

    The Attainment page enables you to specify the superelevation standards to apply. You apply standards by selecting them from a series of lists. The content of the lists reflects the content of the currently selected design criteria file, which you can customize to suit your local standards. For more information, see the Modifying a Design Criteria File tutorial exercise.

12. Specify the following parameters:
    • Design Criteria File: _Autodesk Civil 3D Metric Roadway Design Standards.xml, which is located in the Data folder in Corridor Design Standards/Metric

      This is the same design criteria file that the criteria-based design feature uses to validate the alignment and profile geometry.

    • Superelevation Rate Table: AASHTO 2001 eMax 6%
    • Transition Length Table: 2 Lane
    • Attainment Method: AASHTO 2001 Crowned Roadway
    • % Transition Into Tangent: 70.00%
    • % Transition Into Spiral: 100.00%
    • Apply Curve Smoothing: Cleared
    • Automatically Resolve Overlap: Cleared
13. Click Finish.

    The superelevation values are calculated for each curve, and the Superelevation Tabular Editor vista is displayed. In the drawing, the station value and cross slope at each critical superelevation station is indicated by symbols and green labels. The symbols and labels were specified as part of the alignment label set. They were not displayed before because there was no superelevation data on the alignment.

    You will learn how to edit superelevation data in the Superelevation Tabular Editor in Exercise 4: Adding and Modifying Superelevation Stations.

14. Click to close the Superelevation Tabular Editor.

To continue this tutorial, go to Exercise 2: Calculating Superelevation for an Individual Curve.