1. MATRIX Missouri Analytical Traffic Reporting Information Exchange
Missouri Traffic Safety and Blueprint Conference 2016
SAC Director Mark Ritchey, PhD

2. Overview Introduction Missouri’s Model Project Phases
Goals of Missouri

3. Statistical Analysis Center
What is the SAC?
The mission of the Missouri Statistical Analysis Center is to provide research, technical, and statistical analytical support to federal, state, and local authorities, policy makers, and citizens of Missouri.
Standard reports for both crime and traffic safety
Access to traffic safety, Uniform Crime Report, Criminal History data
Traffic crash mapping

4. What is the MATRIX? Forecasts traffic crashes
Predictive statistical model
Identifies potentially adverse locations
Encourages smart policing
Information exchange for all law enforcement agencies in Missouri
Provides traffic crash forecasts
Endorses collaboration
Promotes electronic reporting

5. Projected Model
Fatal/Severe Injury Crash = Location + Weather + Crash Conditions + Traffic Speed
Dependent Variable: Fatal/Severe Injury Crash
Independent Variables:
Location = where the crash occurred
Weather = historical and forecast data from the National Weather Service Stations
Crash Conditions = road curvature, elevation, road conditions, and etc…
Traffic Speed = the average speed of motorists on a given road segment

6. Missouri Model: Bins 5mi x 6mi grid Clipped by Missouri boundary
Average area = mi²
Ideal size?
2D is only a snapshot!
Think in terms of 3D to incorporate time
Column = Bin
Row = Time

7. Missouri Model: Road Segments
Each black line is a road segment
344,284 road segments
Segments vary in length
Easier for geometric measurements
Allows for better speed variable
Time applied similarly to bins

8. Missouri Model: Weather
Identify weather stations in Missouri
Variables
Temperature
Precipitation
Wind speed
Sunrise and sunset times
Can be tied to either bins or road segments
Coverage?

9. Weather Station Coverage by Bins and Segments

10. Missouri Model: Speed Speed data available for road segments
Breakdown of speed ranging from every two minutes to every hour
Example: Boone, Callaway, Cole, Moniteau
Issues
Segment length
Incorporate into bins?
Vehicle miles traveled or congestion

11. Missouri Model: Enforcement
Automatic Vehicle Locator
MSHP patrol vehicles equipped with gps tracker
GPS pings every 0.2 miles or every 60 seconds
Assessment check
Determine measurement of enforcement
Based on pings
Based on time

12. Enforcement measurement by road segment

13. Enforcement measurement by geographic bin

14. ? Missouri Model Bins Weather Speed OR Historical Crash Data
Road Segments

15. Project Phases Phase I: Acquisition of necessary infrastructure
Phase II: Preparation of the data
Phase III: Development of predicative models
Phase IV: Testing and Evaluation of analytical models
Phase V: Deployment in the field
Phase VI: Development of information exchange portal
Phase VII: Feedback and evaluation

16. Project Goals Reduce fatal/severe injury crashes
Increase proactive policing
Increase participation in electronic crash reporting
Increase law enforcement collaboration
Spur innovation

17. Thank You & Questions?