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


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


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

Slide 9 Alternative 2 Alternative 3

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

1122

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Science-based; updated regularly to reflect

research33

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


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


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


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


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


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


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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aashto highway highway safety manual safety manual 2010...

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