Patrick Evans, P.E. Senior Advisory Pre-Sales Technical Support Rep Superelevation in the Roadway...
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Transcript of Patrick Evans, P.E. Senior Advisory Pre-Sales Technical Support Rep Superelevation in the Roadway...
![Page 1: Patrick Evans, P.E. Senior Advisory Pre-Sales Technical Support Rep Superelevation in the Roadway Designer.](https://reader033.fdocuments.in/reader033/viewer/2022051515/551c58ff550346a66a8b4ff0/html5/thumbnails/1.jpg)
Patrick Evans, P.E.Senior Advisory Pre-Sales Technical Support Rep
Superelevation in the Roadway Designer
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Agenda
Examples
Rollover Locks
Editing Superelevation
Superelevation Sections
Superelevation Input Methods
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Superelevation in the Roadway Designer
Key Concepts• Superelevation is a Point Control in the Roadway
Designer.
• All Point Controls are applied to a specific point name.
• Point Controls are subject to point constraints
• Superelevation presented as a Superelevation diagram.
• Multiple methods to compute and apply Superelevation
• Easy to edit/adjust Superelevation
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Creating Superelevation
• Superelevation – Created and applied in the
Roadway Designer
– Saved in the Roadway Design file ~ ITL file
– Create Superelevation Wizard steps you through the process (Automatically creates vertical point Controls of Superelevation Type)
– Automatically overrides existing template point constraints
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Superelevation Input Methods
• Wizards– AASHTO– Fixed Length– Table
• Creating a Single Control Line (Manual edit)
• Importing Superelevation (from ASCII)
• Importing Superelevation from INP file (for bringing older super data forward)
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Why Use the Wizard?
– Automated– Creates Control Lines– Assigns Point Constraints to Control Line
Points – Creates Superelevation Point Controls– Establishes Relationships Between Control
Lines (You can Use Edit Curve Set Station)
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Things to Be Aware of
– Wizard is Used to Build Initial Superelevation Definition
– Once you exit the Wizard, you cannot “jump” back in the middle to edit an existing section
– Using the Wizard has many more benefits than manually defining control lines or importing from ASCII
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Superelevation Sections
• What is a Superelevation section? – Specifies the sections of
pavement to superelevate– Super sections define a
“Range of Interest” for superelevation control lines
– Think of it as Start and stop station and left and right range points
• Controls lines in different sections cannot be constrained to one another.
• No hard and fast rules for section creation, just a way to manage related control lines
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Superelevation Sections
Section 1 Section 2
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Naming Sections and Control lines
• Create names that can be easily understood
• The default naming attempts to give the control line a meaningful name, but is probably not what a user would choose.
• Keep names as short and concise as possible to make them easier to find in lists and combo boxes.
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Resolving Overlaps
• Fix Superelevation Overlap Dialog– Use to resolve
superelevation overlaps
• Two solutions– Shift the transition onto
curve– Reduce the transition
length
• Basic Workflow– Key-in the Length of the
Shift or,– Key-in the Reduced
Transition Length– Click Apply and Next>– Repeat for all overlaps
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Creating Superelevation
• After Superelevation is created, selecting the Display Superelevation button changes the Roadway Designer windows to show superelevation data
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Slide 13
Creating Superelevation
• Superelevation Diagram View Window– Displays superelevation control lines– Displays different colors for each control line,
which are not related to slope– Edit superelevation points here– Superelevation points are constrained
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Editing Superelevation
• Move/Delete/Edit point commands
• Constraints– Use them to maintain superelevation integrity
or to precisely locate a point without needing to calculate the location.
• Edit Curve Set Stations command– Only available when super placed using
wizards.– Allows for tabular display and edit of super
points.
• Delete Points command
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Creating Single Control lines
• Can start with a flat line or copy information from an existing line
• Must manually enter all station and cross slope information
• Must manually create point control(s) associated with the control line
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Inserting/Modifying Points
• Right Click on the control line to insert a point
• Right click on a point to modify
• Use the dynamic settings for precision placement
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Adding Point Constraints
• Right Click and add constraints
• Point Properties
• Points cannot be constrained to points belonging to a different section!
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Point Controls
• Superelevation Point Controls
– When defining Single Controls lines manually, Point controls must be defined for each control line
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Apply Shoulder Rollover Lock• Basic Workflow
– Create Superelevation using the Wizard
– Select Superelevation > Apply Shoulder Rollover Lock command
– Select Process All and review the design
– Save the Roadway Design
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Template Shoulder Rollover
• Easy to define and change
• Does not create additional control lines
• Useful for satisfying standard shoulder requirements that are not project specific
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Import Superelevation (from ASCII)• Import up to two control lines from a text file that contains
station and left and right cross slope information.
• Imports pipe delimited format using the first three values only-Station|Finished Grade Left|Finished Grade Right|
• Creates the control lines and associated point controls.
• Constraints are not assigned
• Cannot use Edit Curve Set Stations
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Import Superelevation from INP
• Method to get import traditional GEOPAK superelevation data
• Creates two controls lines (Left and Right)
• User must manually create point controls.
• User must manually assign point constraints
• Cannot use Edit Curve Set Stations
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Slide 23
Using superelevation in end conditions
• Yes, you can!
• Using super to control end condition slopes
• Avoid ROW Encroachments, etc.
• No End Condition Transitions/Overrides required
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Slide 24
Independent Subgrade Superelevation
• Workflow– Create two templates
• Top Component Only• Subgrade Components Only
– Use the Wizard to define the superelevation for the top points of the template
– “Swap” the complete template with the subgrade only template.
– Use the Wizard again to define the superelevation control lines
– Edit control lines as necessary– Finally, “Swap the subgrade only
template with the complete template.
– Remember: Point names should match for both templates!!!
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Summary
• There are six ways to define Superelevation in Roadway Designer, both automated and manual including 3 AASHTO methods
• There are benefits and drawbacks of each method
• There are many ways to edit superelevation in the Roadway Designer
• Superelevation can also be used in an unconventional way to satisfy special design requirements
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Questions?
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