Calculate Superelevation

This exercise demonstrates how to automatically calculate superelevation and create a super elevation drawing using the Automated Superelevation design tool. The tool will generate an ascii input file used in several applications, primarily to draw dgn elements representing the roadway superelevation that is necessary to run proposed cross sections.

To begin open the shape dgn file, XX####_SHP.dgn. It is useful to have the horizontal alignment (HA) file referenced.

Next, Open the Project Manager, then go to Directory>Current Working Directory, next Select Project (.prj file) to work on then Select OK, and then Select User [name] from Project Users menu.

Verify the proper working alignment is being used. Select Calculate Superelevation tab on the Project Manager menu.
Project Manager menu

The Select Run menu will appear. Create a new run. Go to Run>New.
Select Run menu, create new run

Enter a run name and description. Use good a good description for documentation.
New Run Name menu

Select created run and then select OK.
Select Run menu with new run

The Automated Superelevation menu will appear. First set all tool settings .  To do so, go to File> Select each command; Directories, Preferences, and Level Symbology separately.
Automated Superelevation menu, with File commands


The Superelevation Directories menu appears after selecting File>Directories Select Default All, then Select OK.  This will load the standard preference, superelevation rates (e), and length of transition files.  The Autoshape Input Files Path field should be blank and is a user defined later in the exercise. Note the default file locations are in the ProjectWise C:\drive locations and is shown correctly below for an English units project. For Metric the path would be c:\myfiles\pw_production\d0107614.
Superelevation File Directories menu


Because the directories have been set using the above menu, the preference files are now loaded for the Automated Superelevation tool to use.  The preferences (.sep) files have been configured to WFL standards by the Standards Engineer.  THERE IS NO NEED TO ADJUST THESE SETTINGS.  See superelevation preferences for more information.

Level Symbology

The Superelevation Symbology menu appears After selecting File>Level SymbologyDouble click on the symbology preview boxes and change symbology to settings shown below. Close menu after editing to save changes.
Superelevation Symbology menu

Dependent Shapes symbology. Level: P_RDW_Super_Shapes
Set Feature menu, dependent symbology menu

Independent Shapes symbology. Level: P_RDW_Super_Shapes
Set Feature menu, independent symbology menu

Back to the Automated Superelevation menu. It is best to visit each field to assure proper operation.

Automated Superelevation menu fields

Select Preference File. Preferences Files are loaded from the directions preferences shown earlier. The preferences file is chosen according to transition distribution ratio (tangent:curve) shown below (See AASHTO 2011, 3-67, Table 3-18).

Automated Superelevation menu, preference file field

e Selection. The Superelevation rate tables have also been loaded from the directories preferences. Select "e" rate and design speed from the pull down. Note: each "e" rate is paired with a design speed.
Automated Superelevation menu, e selection field

Left and Right Tabs. The Left and Right tabs control values for each side of the shapes knows as shape clusters. The shape cluster consists of the slope (normal crown), Tie point, shape offset (width), and dependencies.  Start with the Left Tab. Entries will be automatically be applied to the Right Tab.

Automated Superelevation menu, left and right tabs and quick entry icon

Quick Entry Menu

Quick Entry menu

The cluster data will be entered on each tab. Select Right Tab and uncheck the Dependent box.  This is done to keep each shape side designated.
Automated Superelevation menu, right tab independent

Next, Create Input File. Select spyglass to name the input file. 
Automated Superelevation menu, create input file field

Next, in ProjectWise select No Wizard. Then, Select Input File menu appears, designate Name, Description and File Name using best practices, then Select Save.  This creates a writeable file to generate shape data.
Select Input File menu

Select Generate Superelevation Transitions to create input file.
Automated Superelevation menu, completed

The Text Editor menu appears with the newly created input file loaded (note input file name).  This is the input file used to create the shapes in the dgn. To create the shapes select Create Superelevation Shapes icon.   Note other file information highlighted is identified in the input file.
Text Editor menu with created input file loaded

The shapes will be drawn in the dgn file.  Below is a sample of superelevation shape in dgn with view attributes fill on.
Shape drawing example with fill turned on

Sample of superelevation shape in dgn with view attributes fill off. Note transition locations.
Shape drawing example with fill turned off

Other method to draw shapes

To process the input file separatelySelect Autoshape Builder icon in the Road Tools task menu.
Road Tools task menu with Autoshape Builder icon

Superelevation Autoshape Builder menu appears.  Select input file using spyglass and then select Draw Superelevation Shapes button.
Superelevation Autoshape Builder menu

Other information

The last line in input file specifies the dgn file to draw shapes in.

The input file (.inp) and the log file (.log) can be opened in UltaEdit and superelevation reviewed for conflicts and or/edited.

Caution should be used when editing transition lengths and locations and should be done with Green Book guidance.

Warning in input file example
Input file warning example

Warning in log file example
Log file warning example

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