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SAFETY MANAGEMENT SYSTEMWASHTO – BOISE IDAHO

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Martin Kidner WYDOTJoe McCarthy – JDI

Consulting

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WHAT IS THE DATA-DRIVEN SAFETY ANALYSIS

INITIATIVE?

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• “The Highway Safety Manual (HSM) introduces a science-based technical approach that takes the guesswork out of safety analysis. The HSM provides tools to conduct quantitative safety analyses, allowing for safety to be quantitatively evaluated alongside other transportation performance measures such as traffic operations, environmental impacts, and construction costs.”

HSM – DEFENSIBLE APPROACH

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HSM PREDICTIVE MODEL

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COMPARE TO THE ACTUAL OBSERVED

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EMPIRICAL BAYES CORRECTED (“EXPECTED”)

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STATEWIDE SCREENING

Highways 72 % of fatal/incapacitating injury crashes

Initial focus – rural 2-lane largest mileage

EB correction

Facility types

SPF & CMF calculationsRoadway Features

Linear Reference System, Crash Data

State Highways

Public Roadways

2-lane bidirectional Highways

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USING HSM PREDICTIVE*

• Screen with confidence– Hot spots that really will be hot spots

in the future• Prioritize treatments with confidence– Reduction in future crash– Benefit / Cost ratios

(*) SPF Models, site-specific CMFs, and Empirical-Bayes corrected crash counts

Higher confidence in the expected future crash numbers to better drive safety investment

decision

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SAFETY MANAGEMENT SYSTEM

• Library of approved treatment types– Traffic

• Locations to consider for safety treatments– Highway Safety

• Proposed safety treatments (at specific locations)– Project decision-makers

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LIBRARY OF TREATMENT TYPES

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LOCATIONS TO CONSIDER FOR SAFETY

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RECOMMENDED TREATMENTS

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TARGET SETTING

• HSIP funds = 18M$• 20:1 B/C ratio achievable• 18M$ of treatments with 20:1

should result in an annual reduction in critical crashes of 8.05HSIP funds $18,000,0

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Benefit to cost average 20:1

Number of critical crashes per year that can be theoretically reduced

8.05

An anticipated reduction of critical crashes by 1.5 per district per year

seems to be an achievable target

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63:1 average

20:1 target

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TREATMENT AND TARGET CONTRIBUTIONS

Target Crash Reduction

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CONCLUSION

• HSM gives a national standard– HSM gives predictive ability

• Mix systemic and crash data treatment

• Data can assist–With roadway features– Rank order projects– Determine realistic crash

reduction goals

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Joe.McCarthy@wyo.gov (970-412-4022)Martin.Kidner@wyo.gov (Planning)Matt.Carlson@wyo.gov (HWS)

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Safety Mangagement System20

June, 2015

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Safety Mangagement System21

June, 2015

http://shawbrothers.com

http://industrialpro.ca

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Safety Mangagement System22

June, 2015

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COMPLEXITY

“In his Introduction to Complex Thought, French philosopher Edgar Morin reminds us that the word complexity stems from complexus: that which is fused together. Furthermore, Morin assets that the problem we sometimes have in the West is that we are too accustomed to separating things. We need to better learn how to draw links and contextualize.”

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23 CFR 924.11, IMPLIMENTATION

• A State is eligible to use up to 10 percent of the amount apportioned under 23 U.S.C. 104(b)(5) for each fiscal year to carry out safety projects under any other section, consistent with the SHSP and as defined in 23 U.S.C. 148(a)(4), if the State can certify that it has met infrastructure safety needs relating to railway-highway grade crossings and highway safety improvement projects for a given fiscal year.