Session 9 - Ting Wei
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Transcript of Session 9 - Ting Wei
INTEGRATING TRAFFIC SIMULATION INTO DESIGN VISUALIZATION: A CASE STUDYDESIGN VISUALIZATION: A CASE STUDY
Ting Wei, PE, PTOE, AICPAmerican Structurepoint, Inc.
Presented at 2010 ITE Annual Meeting
Presentation StructurePresentation Structure
Introduction on design visualization and traffic simulation
Background of case study Integration process unveiled Integration process unveiled Final thoughts
Design VisualizationDesign Visualization
Visualization formats: 2D vs. 3D Image vs. animation
Reasons to incorporate dynamic traffic elements: Reasons to incorporate dynamic traffic elements:Make visualization closer to real life conditions Extend beyond “how it looks” to “how it works” Extend beyond how it looks to how it works
Design Visualization and Traffic SimulationDesign Visualization and Traffic Simulation
M h d i d i ffi l Methods to incorporate dynamic traffic elements in Design Visualization
ll k d b d l fManually keyed objects in 3D modeling software Difficulty in modeling realistic traffic movement Photo realistic video Photo‐realistic video
3D traffic simulation by traffic simulation software 3D video directly recorded in software 3D video directly recorded in software “Cartoonish” video
The challenge: incorporate realistic traffic The challenge: incorporate realistic traffic movements into a photo‐realistic visualization
Case Study in Carmel, IndianaCase Study in Carmel, Indiana
Keystone Avenue 4‐lane divided arterial 6 existing signalized intersections to be replaced with 6 tear‐drop roundabout interchanges.
Need for Design Visualization Public education Public education Traffic operations Corridor appearance Corridor appearance Property impacts
Roundabouts in CarmelRoundabouts in CarmelUpdated in Summer 2010
Existing Roundabouts
Roundabouts In Construction
PlannedRoundabouts
CarmelBoundary
Integration Process UnveiledIntegration Process Unveiled
A four‐step process to integrate traffic simulation into design visualization
Selected software: VISSIM for traffic simulation VISSIM for traffic simulation 3ds Max for 3D modeling
Visualization products: Visualization products: Images Videos
Step 2: Vissim ModelingStep 2: Vissim Modeling
Network built on design geometry (two dimensions only)
Vehicle information Vehicle information recorded in text file
Step 2: 3ds Max ModelingStep 2: 3ds Max Modeling
Photo simulation: 3D objects displayed on top of a background photo
Vehicle Elevation Adjustment: BeforeVehicle Elevation Adjustment: Before
Vehicles
Pavement Surface
Pavement Surface
Vehicle Elevation Adjustment: AfterVehicle Elevation Adjustment: After
Vehicles and Pavement Surface
Integration Process RecappedIntegration Process Recapped
Step 1: Design CAD SoftwareDevelop Horizontal and Vertical Design Elements
Step 1: Design CAD SoftwareDevelop Horizontal and Vertical Design Elements
Step 2: VISSIMCreate Traffic Simulation
Record Vehicle Position Information
Step 2: 3ds MaxCreate a Detailed 3D Model
Step 3: 3ds MaxStep 3: 3ds Max
Record Vehicle Position Information
Insert 3D Vehicle Models Using Vehicle Information from VISSIMAdjust Vehicle Elevation if necessary
Render Images
Insert 3D Vehicle Models Using Vehicle Information from VISSIMAdjust Vehicle Elevation if necessary
Render Images
Step 4: Video Editing SoftwarePost‐process Rendered Imagesp gProduct 3D Animation Videos
Final ThoughtsFinal Thoughts
The message delivered by design visualization is two‐fold : “It looks good and it works well!”g
The integration requires expertise in both traffic engineering and 3D modeling and cantraffic engineering and 3D modeling and can take weeks or months to complete.
It is difficult to measure the benefits of design visualization. More research is needed in order to better justify design visualization.