Advanced Superelevation Roadway Design Using Non-Center Axis of Rotations Karen Dowling Senior QA Analyst Karen.dowling@autodesk .com

Class Summary Class: CI4031 This class focuses on the enhanced superelevation functions now available in AutoCAD® Civil 3D®, specifically axis-of-rotation (AOR). Using the new LaneSuperelevationAOR subassembly to define potential pivot points, users can define cross-sectional components in a very flexible manner and allows the dynamic editing of the axis of rotation to quickly validate various alternatives.

First Things First …. Please silence phones Hold questions till the end Session handout and evaluations Special Thanks To Lisa Fox, Principle Engineer, Autodesk, Inc.

Agenda Identify Key Prerequisites For Design Success Review the Big Picture Review new Superelevation Wizard UI Review the new LaneSuperelevationAOR subassembly Ex. 1- Create a corridor for simple roadways using Axis of Rotation Points Ex. 2 - Create a corridor for divided roadway. Control median geometry Ex. 3 – Review Towards Crown SA parameter Ex. 4 – Real life example

Key Prerequisites for Success 1. Alignment Layout & Design final or approaching final layout 2. Roadway Design Defined Number of lanes Divided or Undivided roadway Crowned or Planar roadway section Distorted or maintained median

Review New UI - Assigning Pivot Method

The Big Picture 1. Define Alignment 2. Select Axis of Rotation Point AOR is a workflow 3. Calculate Superelevated Lane Slopes 4. Create an Assembly that supports Superelevation and Axis of Rotation Build a corridor that uses all this data.

Using The New LaneSuperelevationAOR Subassembly LaneSuperelevationAOR is the only subassembly provided in C3D content that supports AOR pivot points. If LaneSuperelevationAOR (or a custom subassembly supporting pivot points) is NOT contained in the assembly, the pivot method specified in the SE wizard will be ignored and “Baseline” pivot type will be applied.

Ex. 1 Create and edit a corridor for a simple roadway section using Axis of Rotation Points

Creating Assemblies for Divided Highways Curve to the Right Maintain Median Shape Distort Median Shape

Ex. 2 Create a corridor for divided roadway Ex. 2 Create a corridor for divided roadway. Control median geometry – maintain or distort shape.

Build divided road from baseline Toward Crown Construct Assemblies Using Toward Crown slope direction Build divided road from crowns of barrels Away from crowns Build divided road from baseline Toward Crown

Ex. 3 Create a Divided Crowned Assembly using towards crown subassembly parameter.

Ex. 4 Authentic application: Adjust pivot method to assist with managing design constraints

Pivoting about ETW (or other non center point) is possible Summary Pivoting about ETW (or other non center point) is possible Controlling median geometry is possible Many existing subassemblies behave well with non-center pivot points You can add AOR support to your custom subassemblies

Questions? Superelevation 101, AU 2010 Class CV-2284C Talk after class Find me in the Autodesk AEC Lounge Tonight 3:30 – 6:30pm Email: karen.dowling@autodesk.com

Thank You! *Please Remember Class Evaluations Karen Dowling Senior QA Analyst Karen.dowling@autodesk .com

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