roadway design models: streamlining conversion for driving simulation shawn allen the national...
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Roadway Design Models:Streamlining Conversion for Driving Simulation
Shawn AllenThe National Advanced Driving Simulator
Mid-Continent Transportation Research Symposium 2013
The National Advanced Driving Simulator
Background• Visualization
– Look and feel of project– Design proof of concept– Buy-in from project stakeholders– Limited presentation of operational aspects
• Driving Simulation– Virtual “computerized” model– Test drive of appearance AND operation– As with visualization, comes in many “flavors”.. Ie,
levels of simulator fidelity
Current Parallel to Virtual Testing
Test Drive It Before You Build It• Virtual proof of concept
– Build it in a computer before you actually build it in the real world
• Determination of satisfactory conditions• Public relations
Visualization Case StudiesMnDOT Highway 61 Bridge Project
Is a Driving Simulator aGood Test Case?
http://www.madsciencemuseum.com/msm/pl/billboard_experiment
Making A Case for Driving Simulators• FAA guidelines permit pilot training on certified
simulators to substitute for actual hands-on in the real-world
• Extensive simulation use across industry sectors
http://www.graphit.hu/Tecnomatix/Products/Plant%20Simulation.aspx
http://newshopper.sulekha.com/boeing-787-flight-simulator_photo_1481525.htm
Uses of Driving Simulation for Transportation Visualization
• Research• Training• Outreach• Human factors and operational evaluation:
– Speed selection– Lane selection– Gap acceptance– Sign comprehension and compliance– Workzone driving performance
FHWA Simulator Case Study
• Diverging Diamond Interchange
http://www.fhwa.dot.gov/publications/research/safety/07048/
Transportation Model Conversion to Driving Simulator Model
Transportation model
Driving simulator model
Transportation Design Model
• Goal: “hands-free” conversion• Significantly more data than needed for
simulation• Access to required elements requires
adherence to design standards or robust interrogation algorithms, or both
Elements Required* for Simulation
DOT Design file Simulator AttributeVisual Model X X
Road centerline X XLateral profile X X
Lanes X XJunctions X X
Pavement surface X XSurface type X X
Shoulders, ROW X Grading (fill, granular, special, side slopes, pavement bottom,
earth fill)
X
Underlayment X
*Characteristics for NADS simulators
Design Model Data Processing
Simulator Scenario file
NADSISAT
LandXML file
Bentley MicrostationDesign FileIowa DOT
XMLtoTrivisual
NADSBeX
visuals file
.top.crdr.road.isxn
XMLtoLRIlogical
NADSlrigeneration
Simulator visualization
tilegen NADSlricc
NADSLRI file
NADSBLI file
Prototype Converter Tool
Existing MiniSim Simulator Production Pipeline
visualizer
.pet.corr.pathElev. map
visual data pathway
logical data pathway
simulator input data
Iowa DOT/InTrans Converter Prototype Technical Report
Issues Encountered
• Challenges accessing source data• Invalid data in test model (source)
Boundary data spikes Triangulated surface errors at overpass
Future Steps
• Identify & secure project funding– Proposal under review for University of Iowa to become
a University Transportation Center• Improve surface processing to include texture• Improve data algorithms for general-purpose
– More model design types– Greater project complexity– Smooth junction connectors
• Include additional attributes– Lane markings, signage, etc.
Acknowledgements
• The Iowa Department of Transportation• Center for Transportation Research and
Education at Iowa State University• Charles Hixon III, Bergman Associates• Michael Manore, Vispective Management
Consulting