Superelevation Curve Manager Dialog Box

Review superelevation curve details and edit superelevation design criteria.

Superelevation Curve

Displays the curve name and highlights the curve in the drawing. Select a curve from the list, or click Previous or Next to navigate through the curves.

Toggle Real-time Pan

Pans to the selected curve in the drawing.

Create User-defined Curve

Click to create a user-defined curve by selecting a single alignment entity or string of adjacent alignment entities.

Superelevation Curve Details

Curve Name

Specifies the name of the curve. The curve is highlighted in the drawing.

Curve Definition

Displays the curve definition.

• Automatic: the curve was automatically detected.
• User-defined: the curve was created manually.

Design Speed

Specifies the design speed for the curve. Click to display the Design Speeds tab of the Alignment Properties, where you can add or change design speeds on the alignment. For more information, see Design Criteria Tab (Alignment Properties Dialog Box).

Note: The following curve properties are read-only:

• Radius (you can enter a radius value in a user-defined curve)
• Direction (you can change the direction in a user-defined curve)
• Start Station
• End Station
• Length

Right-click any of these items for options to zoom or pan to property in the drawing.

Transition In and Transition Out Details

Entity Before

Displays the entity type and direction of the entities before the curve. None is displayed if the alignment begins with a curve.

Transition Method

Displays one of the following:

• Not Calculated
• User Defined
• Normal Transition: occurs in the area where the cross slope changes from a normal crown to full superelevation or to normal crown from full superelevation.
• Reverse Transition: occurs between two back to back reverse curves, where full superelevation for one curve transitions into full superelevation in the opposing direction.
• Compound Transition: occurs between two back to back compound curves, where full superelevation at one curve transitions into full superelevation of the other curve.

The transition method is determined by the occurrence of overlap and the type of curve (reverse or compound).

Overlap

Displays one of the following:

• Not Calculated
• With Previous or Next Curve
• Resolved
• None

Superelevation Criteria

Identifies the parameter values specified when superelevation was either calculated using the Calculate Superelevation wizard, or imported from a CSV file. For descriptions of each property, see Superelevation Wizard.

Typically, this node is only displayed when you use the Superelevation wizard to create superelevation. However, in a situation where you migrate a drawing, from a release prior to Autodesk Civil 3D 2025, that contains superelevation, Autodesk Civil 3D tries to determine if the criteria that was used in the calculation is available.

Important: In situations where the design criteria file cannot be found you must specify a file and update the file path. After specifying the file, right-click a Value cell and click Apply To Entire Alignment.

Note: If you make a change to the Superelevation Criteria, the Superelevation Status in the Superelevation Curve Manager displays to indicate the status is “Out Of Date”. Click the Recalculate button to update the data display.

Note: When you edit Superelevation Criteria in the Superelevation Curve Manager, the changes are only applied to the currently displayed superelevation curve. To apply the changes to all superelevation curves, right-click a Value cell and click Apply To Entire Alignment.

Superelevation Status

Displays the current status of the superelevation data as Calculated, Not Calculated, or Out Of Date.

Recalculate

Click to recalculate the superelevation on all “out of date” curves. This option is displayed when a change is made to the Superelevation Criteria or design speed.

Superelevation Wizard

Displays the Create Superelevation dialog box where you can specify superelevation for one curve, a selection of curves, or the entire alignment.

Tabular Editor

Displays the Superelevation Tabular Editor. For more information, see Superelevation Tabular Editor (Panorama).