To Calculate Superelevation Data Using the Wizard

Use this wizard to specify carriageway type, number of lanes, shoulder control, and attainment method for calculating superelevation.

Exercise 1: Calculating Superelevation for an Alignment

The Superelevation wizard can be used to:

Note: The options on the wizard pages can vary depending on the type of carriageway section you select. You must complete the wizard or end the command to continue work in the drawing.
  1. Click an alignment in the drawing.
  2. Click Alignment tabModify panelSuperelevation drop-downCalculate/Edit Superelevation Find.
    Note: The first time you use the Calculate/Edit Superelevation command on an alignment that contains no superelevation data, a superelevation curve is calculated for each curve (circular arc) in the alignment. A task dialog is displayed with the following options:
    • Calculate Superelevation Now - choose this option to launch the Superelevation Calculation Wizard.
    • Open The Superelevation Curve Manager - choose this option to open the Superelevation Curve Manager, where you can view curve data.

      After the initial superelevation calculation, the Calculate/Edit Superelevation command automatically displays the Superelevation Curve Manager.

  3. On the Calculate Superelevation - Carriageway Type page, select one of the following road types:
    • Single Crowned
    • Single Planar
      Note: In the list box specify the highside as Left Edge, Level, or Right Edge.
    • Divided Crowned With Central Reserve
    • Divided Planar With Central Reserve
  4. Specify the Pivot Method.
  5. For dual carriageway types, specify the Central Reserve Treatment.
  6. Click Next.
  7. On the Calculate Superelevation - Lanes page, specify the number of lanes. Clear the Symmetric Carriageway check box if necessary and specify the number of lanes for the left and right sides.
    Note: If you select '1' for the number of lanes, the lanes that are displayed in the Superelevation Tabular Editor (Panorama) are the outside lanes. Any labels, expressions, or other references for the inside lanes do not return a value in the tabular editor. To display values for the inside lanes in the tabular editor, select '2' for the number of lanes.
  8. Enter the Normal Lane Width and Normal Lane Crossfall for each side of the road.
    Note: The Normal Lane Width and Normal Lane Crossfall values are always the same for both sides of the road, even if the Symmetric Roadway box is cleared. Number of Lanes is the only parameter that can vary between the left and right sides.
  9. Click Next.
  10. On the Calculate Superelevation - Shoulder Control page, specify the Shoulder Slope Treatment. The options in the list for Shoulder Slope Treatment can vary depending on the carriageway type.
  11. Enter the Normal Shoulder Width value.
  12. Enter the Normal Shoulder Slope value.
  13. Specify whether to apply a Maximum Shoulder Rollover value.
  14. Click Next.
  15. On the Calculate Superelevation - Attainment page, specify the following:
    • Design Criteria File
    • Superelevation Rate Table
      Note: In the list, choose Superelevation Rate By Formula in situations where you want to calculate the superelevation rate based on a formula rather than a pre-defined table. In the out-of-box criteria files that Civil 3D provides, there is a simple formula based on AASHTO standards that will calculate the superelevation for a given radius and design speed. You can edit this formula to meet the requirements of local agencies that may vary from AASHTO.
    • Transition Length Table
    • Attainment Method
    • Transition Formula For Superelevation Runoff
    • Curve Smoothing. To apply curve smoothing select the check box and enter the smoothing value.
    • Automatically Resolve Overlap. If you select this option all overlap conditions on the entire alignment are resolved.
  16. Click Finish. The Superelevation Tabular Editor is displayed.
Parent topic: Superelevation Data

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