SHRP 2 Safety Implementation: Strategic Planning Using the Data

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SHRP 2 Safety Implementation:

Strategic Planning

Using the Data

Meeting with AASHTO Safety Management August 30, 2012

Accelerating solutions for highway safety, renewal, reliability, and capacity

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What are the SHRP 2 data?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– 3,100 drivers, male and female, all ages

• Roadway data – CTRE – from roadway inventory– from mobile van data collection in study areas

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NDS Study DesignNDS Study Design

Largest Naturalistic Driving Study Ever Undertaken• 3,100 primary drivers, all age/gender groups.• 3,900 data years; 2.5M trip files• 2 years of data collection

• some participants for 1 year, some for 2 years

• Vehicle Types: All light vehicles including• Passenger Cars• Minivans• SUVs• Pickup Trucks

• Six data collection sites Integration w/ detailed

roadway information Data useful for next generation of researchers

150 DAS

300 DAS

450 DAS

4/23/2012 3Jon Hankey - SHRP 2 S06

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NDS Data Overview 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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Data Acquisition System (DAS)

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Roadway data overviewRoadway 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

• Existing data from state inventory: any available safety-related information – varies by NDS site

• Supplemental data: traffic, weather; work zones; crashes; roadway improvements; laws; safety campaigns

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Status and scheduleStatus and schedule

• Data as of August 15, 2012 – 1,859 vehicles on the road, 423 completed participants– 1,711 vehicle-years in database, 44% of 3,900 goal– 450K+ trip files in database; 2.5M+ miles of driving– 73 known crashes (more in database not yet identified)– 5,250 centerline miles of roadway data collected; will have

8,800 by the end of 2012

• 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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Four analysis contractsFour analysis contracts

• MRI Global – Karin Bauer– Offset intersection influence on left turn behavior

• University of Minnesota – Gary Davis– Distraction influences in congested freeway crashes

• CTRE – Shauna Hallmark – Run-off-road crashes on rural 2-lane curves

• SAFER – Trent Victor– Distraction assessment model using eye glances

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Strategic Implementation Plan for Safety DataStrategic Implementation Plan for Safety Data

Components

• Implementation goals

• Target audiences for the databases

• Types of data and user requirements

• Marketing and communications

• Data access and user assistance

• Periodic evaluation

• Long-term stewardship and ownership

• Budgets and resources

• Roles and responsibilities

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Strategic Implementation Plan for Safety DataStrategic Implementation Plan for Safety Data

Status

• Implementation goal: many users will use the NDS and roadway data to address significant safety issues

• Data users, data access: discussions summer 2012

• Resources, roles and responsibilities: TBD

• Marketing and communications: we welcome your suggestions

• Schedule:– Initial meetings with key users: May-August 2012– Draft plan: fall 2012, circulate widely– Revised plan: December 2012

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Users and usesUsers 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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Potential uses – roadway examplesPotential uses – roadway examples

How do roadway features affect driver behavior? • Lane marking, centerline and edgeline rumble strips,

signage – effect on lane-keeping• Intersection design features (protected turn lanes, …) –

effect on gap acceptance• Traffic density – effects on lane-keeping, turning behavior

at signalized and unsignalized intersections

The Roadway Information database offers potential uses with other safety databases independent of the NDS data (FARS; HSIS) and as a standalone model for integrating disparate data sources, especially data related to safety

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Potential uses – behavioral examplesPotential uses – behavioral examples

Distraction: cell phones• How often do drivers use cell phones?• Does a state cell phone law affect cell phone use?• Do drivers use cell phones less in risky situations

such as heavy traffic?• How does cell phone use affect driver compliance

with speed limits, red lights, stop signs, etc?• How does cell phone use affect risky driving behavior

and crash risk?

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Data user toolsData 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• User assistance from VTTI and CTRE

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Discussion questionsDiscussion questions

• What are your priority research areas or questions that can be addressed with NDS and roadway data?

• What are your suggestions for trip summary file variables – which trips or segments to identify?

• What are your suggestions for reduced data sets?• What other suggestions do you have for making the

NDS and roadway data useful to you?

• Send your organization’s ideas to Jim Hedlund [email protected] or Charles Fay [email protected]

by September 30