aashto highway highway safety manual safety manual 2010...
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AASHTOAASHTO Highway Highway Safety Manual Safety Manual 20102010Data Needs and Applications Data Needs and Applications
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Six PresentationsSix Presentations
Overview of HSM Fundamentals of Safety Fundamentals of Safety Road Safety Management Development and Calibration of Safety
Performance Functions Using HSM Predictive Methods to Consider
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Safety when Making Design Trade-offs The Institutionalization of Safety and Decision-
Making Processes using Safety Data
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PresentersPresenters
Geni Bahar - NAVIGATS Inc.John Milton Washington Department of John Milton – Washington Department of Transportation
Raghavan Srinivasan (Srini) - UNC's Highway Safety Research Center
Mike Dimaiuta - Genex Systems
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y
HousekeepingHousekeeping
Cell phones / pagers/ PDAs turned offPDAs turned off
Questions • at the end of each
presentation
• at the completion of all presentations
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Complete Session Evaluation Form
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OVERVIEW OF OVERVIEW OF HSMHSMOVERVIEW OF OVERVIEW OF HSMHSM
Geni Bahar, P.E.
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OutlineOutline
Purpose of the HSMIntroduce the Parts and Chapters of the Introduce the Parts and Chapters of the HSM
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Purpose of the Purpose of the HSMHSM
To provide information and tools to assist practitioners in explicitly consider safety practitioners in explicitly consider safety when making decisions on highway issues
Whenever possible, the safety considerations shall be done quantitatively
NATURE of the information allows for :
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• Meaningful performance measurement for safety • Better accountability with respect to safety
How many crashes can I expect on How many crashes can I expect on this road section?this road section?
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Comparing Expected Safety of Comparing Expected Safety of AlternativesAlternatives
Existing Conditions Alternative 1
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Trading SafetyTrading Safety
What do you do?What do you do?
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The Vision of the HSM The Vision of the HSM ––A Document Akin to the HCMA Document Akin to the HCM
Definitive; represents tit ti ‘ t t f th11 quantitative ‘state-of-the-art’ information
Widely accepted within professional practice of
transportation engineering
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Science-based; updated regularly to reflect
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Significant Effort and Professional Significant Effort and Professional Support Produced the HSMSupport Produced the HSM
Joint Subcommittee (now Task Force) sponsored by 7 TRB committees
Thousands of hours of volunteer effort
Multi-million dollar, multi-
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year research program funded by NCHRP, TRB, AASHTO & FHWA
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HSMHSMHSMHSMpublished in June 2010published in June 2010
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Part AIntroduction
Human Factors
Part D Crash Modification
FactorsFundamentals (CMFs)
Part BR d S f
Part C
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Roadway Safety Management
Process
Predictive
Method
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Part A
Part
Volume 1Volume 1
1. Introduction & Overview B
Part C
1. Introduction & Overview
2. Human Factors
3. Fundamentals
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Part D
Volume 2: Road Safety Volume 2: Road Safety Management ProcessManagement Process
4. Network ScreeningPart
Part A
5 / 6. Diagnosis & Countermeasure Selection
7/ 8. Economic Appraisal & Prioritization
B
Part C
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9. Safety Effectiveness Evaluation
Part D
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COMPANION SOFTWARECOMPANION SOFTWARECOMPANION SOFTWARECOMPANION SOFTWARE
SAFETYANALYST SAFETYANALYST
http://www.safetyanalyst.org
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10. Rural Two-lane Roads
Volume 2: Volume 2: PredictivePredictive MethodsMethodsPart A
Part
11. Rural Multi-lane Roads Part
C
B
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12. Urban Suburban Arterials Part D
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Methodology
Volume 2: Predictive MethodsVolume 2: Predictive MethodsPart A
Part • Safety Performance Functions• Crash Modification Factors• Calibration
Applications
Part
C
B
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Example problems References
Part D
Appendix: Common Procedures
Volume 2: Predictive MethodsVolume 2: Predictive MethodsPart A
Part • Calibrating predictive methods • Empirical Bayes -combining
predicted with observed crashes Part
C
B
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Part D
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COMPANIONCOMPANION SOFTWARESOFTWARECOMPANIONCOMPANION SOFTWARESOFTWARE
INTERACTIVE HIGHWAY SAFETY DESIGN MODEL INTERACTIVE HIGHWAY SAFETY DESIGN MODEL (IHSDM)(IHSDM)http://www.tfhrc.gov/safety/ihsdm
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p g y
Resource on the effectiveness of safety countermeasures
Volume 3: Crash Modification Volume 3: Crash Modification FactorsFactors
Part A
Part countermeasures13. Roadway Segments14. Intersections15. Interchanges16. Special Facilities and Geometric Situations
B
Part C
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17. Road NetworksPart
D
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COMPANION RESOURCECOMPANION RESOURCECOMPANION RESOURCECOMPANION RESOURCEFHWA CRF/CMF CLEARINGHOUSEFHWA CRF/CMF CLEARINGHOUSE
http://www.cmfclearinghouse.org
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HSM as a ResourceHSM as a Resource
System Planning and ProgrammingProject Development Planning Project Development – Planning
Project Development – Design and Construction
Operations and Maintenance
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In Conclusion: In Conclusion: HSMHSM documents the documents the advancements in Safety Knowledgeadvancements in Safety Knowledge
Descriptive Predictive
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THANK YOUTHANK YOUTHANK YOUTHANK YOUQUESTIONS?QUESTIONS?
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