January 14, 2013
Accelerating solutions for highway safety, renewal, reliability, and capacity
SHRP 2 Safety Databases TRB 2013 Annual Meeting
January 14, 2013
What are the SHRP 2 data? Two linked databases providing unprecedented detail on driver behavior and driver interaction with roadway features • Naturalistic Driving Study (NDS) data – VTTI – record of every trip by volunteer drivers over 12-24 months – 2,800 drivers, male and female, all ages
• Roadway data – CTRE – from roadway inventory – from mobile van data collection in study areas
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January 14, 2013
NDS Study Design
Largest Naturalistic Driving Study Ever Undertaken • 2,800 primary drivers, all age/gender groups. • 3,800 data years; 5M trip files; 30M vehicle miles
VTTI
Driving Transportation with Technology
• 2 years of data collection • some participants for 1 year, some for 2 years • Vehicle Types: All light vehicles including • Passenger Cars • Minivans
450 DAS
• SUVs • Pickup Trucks
150 DAS
• Six data collection sites
Integration w/ detailed roadway information
Data useful for next generation of researchers
300 DAS
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January 14, 2013
NDS Data Overview
VTTI
Driving Transportation with Technology
Multiple Videos Machine Vision • Eyes Forward Monitor • Lane Tracker Accelerometer Data (3 axis) Rate Sensors (3 axis) GPS • Latitude, Longitude, Elevation, Time, Velocity Forward Radar • X and Y positions • X and Y Velocities Cell Phone Records • Beginning and end of all cell phone conversations on four major carriers Passive Alcohol Sensor
Illuminance sensor Infrared illumination Incident push button • Audio (only on incident push button) Turn signals Vehicle network data • Accelerator • Brake pedal activation • ABS • Gear position • Steering wheel angle • Speed • Horn • Seat Belt Information • Airbag deployment • Many more variables…
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January 14, 2013
Data Acquisition System (DAS)
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January 14, 2013
Roadway data overview •
New data: collected at highway speed, about 12,500 centerline miles (both directions); independent QA contractor – focus on data needed for lane departure and intersections – curvature location, length, radius; grade; cross-slope; lane number, width, type; shoulder type (width if paved); speed limit signs; medians; rumble strips; lighting; intersection location, number of approaches, and control type; videolog
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Existing data from state inventory: any available safety-related information – varies by NDS site
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Supplemental data: traffic, weather; work zones; crashes; roadway improvements; laws; safety campaigns
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January 14, 2013
New York
Blue: Collected in 2011 Red: Collected in 2012 520 miles in 2011 3,300 miles in 2012 30% Urban 70% Rural
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January 14, 2013
Status and schedule • Data as of early January, 2013 – – – – –
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2,478 participants, active and completed 2,440 vehicle-years in database, 64% of 3,800 goal 3M trip files in database; 19M miles of driving 200 known crashes (more in database not yet identified) 9,306 centerline miles of roadway data collected
Schedule – Add data to NDS and roadway files continually – Complete NDS and roadway data collection November 2013 – Complete data files by March 2014
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January 14, 2013
Four analysis contracts • MRI Global – Karin Bauer – Offset left-turn lanes
• University of Minnesota – Gary Davis – Driver distraction and congested freeway crashes
• CTRE – Shauna Hallmark – Run-off-road crashes on rural 2-lane curves
• SAFER – Trent Victor – Driver inattention and crash risk
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January 14, 2013
Users and uses • Ultimate goal: many users will address significant safety issues with the NDS and roadway data – Gain insights into driver behavior that can’t be obtained any other way
• Short-term goals: assist users in defining research questions, accessing the databases – Who are potential users? – What are potential uses? – How can SHRP 2 assist users in the near term?
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January 14, 2013
Data user tools • Trip summary files – Categorical data on each trip to help users identify trips of interest – Trip, roadway, vehicle, and driver variables – Variables being defined; suggestions invited
• Event files – Brief (30 sec.) segments of all data at events of interest, such as crashes – Event triggers being defined; suggestions invited – Baseline (exposure) events being defined; suggestions invited
• Reduced data sets for individual users
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January 14, 2013
For more information •
Database information: http://forums.shrp2nds.us/
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Program information: http://www.trb.org/StrategicHighwayResearchProgram2SHRP2/ Public/Pages/The_SHRP_2_Naturalistic_Driving%20Study_472. aspx
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[email protected]
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