1. Data and Resources Available for Safety Analysis
Traffic Records Forum
August 7-10, 2016 – Baltimore

2. The HSIS Team Federal Highway Administration Office of Safety R&D
Partnering Agencies
California
Illinois
Maine
Minnesota
North Carolina
Ohio
Washington
Charlotte
Research Team
UNC Highway Safety Research Center
LENDIS Corporation (HSIS Lab)
VHB
MRIGlobal
University of Maryland
ITE

3. HSIS Purpose
To develop safety-related knowledge and to assist other researchers in developing this knowledge
HSIS is much more than a database!
The HSIS can be used to analyze a large number of safety problems. They can range from the more basic "problem identification" issues to identify the size and extent of a safety problem to modeling efforts that attempt to predict future accidents from roadway characteristics and traffic factors.

4. HSIS Functions
Provide quality data to road safety researchers (often in support of other national research programs, such as NCHRP)
Conduct research to support FHWA’s focus areas
Prepare safety assessments using data from HSIS, FARS, GES, HPMS, and other sources
Support development and use of data collection and analytical tools for the study of highway safety
The system is designed to provide data to be used in research conducted in the general public interest, which is intended for publication in a scientific journal or other national publication.

5. HSIS Database Roadway Inventory Crash Information Traffic Volumes
Files can be linked for a wide spectrum of safety studies
Occupant Characteristics
Vehicle Characteristics
Other Information

6. HSIS Agencies

7. HSIS Range of Data

8. HSIS File Types
All of the selected States maintain basic crash files, roadway inventory files, and traffic files. In addition, individual States also collect other types of data. Depending on the particular problem being studied, files from one or more States may be used by the analyst. The following table indicates the files that are available.
Crash - Contains basic accident, vehicle, and occupant information on a case-by-case basis. Typical data include type of accident, type of vehicle, sex and age of occupants, fixed-object struck, accident severity, and weather conditions. Roadway Inventory - Contains information on roadway cross-section and the type of roadway. Data include the number of lanes, lane width, shoulder width and type, median width, rural/urban designation, and functional classification. Traffic Volume - Contains annual average daily traffic (AADT) data. Additional data on hourly volumes and percentage of trucks is also available in selected States and/or locations. Roadway Geometrics - Contains horizontal curve and vertical grade information. Data include degree of curve, length of curve, percent grade. Vehicle Identification Number (VIN) - Contains VIN data decoded using the VINDICATOR program. Data include make and model, body style, body type, curb weight, and wheelbase. Intersection - Contains information on highway intersections. Data include traffic control type, intersection type, signal phasing, and turn lanes. Interchange/Ramp - Contains information on highway interchanges. Data include interchange type and ramp characteristics. Guardrail/Barrier - Contains an inventory of guardrail. Data include guardrail type, post type, rail height, and terminal type.

9. HSIS Users Federal Transportation Agencies FHWA NHTSA FMCSA NTSB BTS
Non-Traditional Federal Agencies
EPA
CDC
Researchers
Universities
Consultants
Nonprofits
Other Government Agencies
State DOTs
MPOs
AASHTO
FHWA: R&D, Office of Safety, Divisions & Resource Centers, Federal Lands
NHTSA, NTSB, FMCSA, BTS
CDC, EPA, NCHRP, Universities, State DOT’s, Contractors/consultants, MPO’s, IIHS, Carfax

10. HSIS Products Data HSIS Summaries FHWA Research Reports
Journal Articles (TRR, AAP, ITE, …)
Safety Analysis Tools
Since its inception, the HSIS has been used in a wide variety of research efforts. Products of these efforts include summary reports, research reports, safety analysis tools, and published articles and technical papers in professional journals.

11. Types of Safety Research
Large problem identification and tracking (e.g., US pedestrian, intersection, or lane departure crashes and fatalities)
Identification of potential sites needing treatment
Development of predictive models to examine effects of roadway design variables on crashes
Development of Crash Modification Factors using before/after or other evaluations.

12. HSIS Research Impact Highway Safety Manual IHSDM SafetyAnalyst
CMF/SPF Guidance
FHWA Policies
Improved Methodologies

13. HSIS Roadway Studies Horizontal and vertical alignment
Safety edge shoulder treatment
Road diets
Rumble strips
Lane/shoulder width combinations
Median width
Two-lane to four-lane conversions
HOV lanes
Cable median barriers
Wildlife-vehicle collisions

14. HSIS Intersection Studies
Intersection angle
Converting Traffic Signals from Incandescent Bulbs to LEDs
Discontinuing Late Night Flash Operations at Signalized Intersections
Transverse rumble strips
Left-turn signal phasing at high-speed intersections
Red light running cameras
Stop Ahead pavement markings
Since its inception, the HSIS has been used in a wide variety of research efforts. Products of these efforts include summary reports, research reports, safety analysis tools, and published articles and technical papers in professional journals.

15. Requesting Data Research Problem Statement Define Data Needs
Match Research Needs to HSIS Data
HSIS Data Tables and Guidebooks
Submit Request
HSIS Requested Data
HSIS Staff Review
Request Denied
Follow-up with HSIS Staff

16. Data Use Requirement

17. New HSIS Safety Efforts
Artificial Realistic Data
Urban/Suburban Arterials – cross section design and curvature
V2I Pilots – potential for crash-reducing technology
red-light running, curves, stop-control gap assist
Spatial data acquisition and dissemination
Transportation Safety Textbook
STAC support - NDS research ideas

18. Outreach to Students
Goal – introduce students to HSIS data & promote safety research
2016 – Inaugural competition
Winner to be announced next week – ITE Annual Meeting

19. New Data Sources – Coming Soon!
Roadway Lighting
Motorcycle Crash Causation

20. Roadway Lighting Data Field measurements of luminance
Front, side, and rear readings
2,114 miles covered
63% interstates and freeways, 23% principal arterials, 11% minor arterials, 4% collectors

21. Vehicle-collected luminance measurements, geocoded with lat/long
Roadway Lighting Data
Vehicle-collected luminance measurements, geocoded with lat/long
Luminance points “snapped” to road centerline and assigned route and milepost address

22. Roadway Lighting Data
CA, DE, MN, NC, VA, VT, and WA

23. Motorcycle Crash Data Orange County, CA 350 crashes, 2011 to 2016
2 controls for each crash
Up to 1,689 data elements for each crash