the safetycube methodology · the safetycube methodology safetycube final conference vienna, 22...
TRANSCRIPT
![Page 1: The SafetyCube Methodology · The SafetyCube Methodology SafetyCube final conference Vienna, 22 March 2018. SafetyCube DSS Road Safety D ecision S upport S ystem Measures Risks Taxonomy](https://reader034.vdocuments.us/reader034/viewer/2022042222/5ec804de30841437b9670eff/html5/thumbnails/1.jpg)
6/26/2018
Co-funded by the Horizon 2020Framework Programme of the European Union
The SafetyCube Methodology
SafetyCube final conference Vienna, 22 March 2018
![Page 2: The SafetyCube Methodology · The SafetyCube Methodology SafetyCube final conference Vienna, 22 March 2018. SafetyCube DSS Road Safety D ecision S upport S ystem Measures Risks Taxonomy](https://reader034.vdocuments.us/reader034/viewer/2022042222/5ec804de30841437b9670eff/html5/thumbnails/2.jpg)
SafetyCube DSS
Road Safety Decision Support System
Measures
Risks
Taxonomy Repository Synopsis Prioritisation
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1. Taxonomy
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Taxonomy
• Risks & Measures
• 3 main AREAS
– Behaviour
– Infrastructure
– Vehicle
• Hierarchical
Risks
Measures
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Taxonomy - DSS
• Backbone of DSS
• Finding risks & measures
• Linking risks to measures
• Additional entry points:
• Road user groups
• Accident categories
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2. Repository
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Repository Literature Search
Literaturesearch
• Lit. data base
•Key words
•Othersources
•# records identified
Screening abstracts
•Evaluate
•# relevant records
Full textdownload
•Download pdf
•Enter in list of papers
Evaluation full text
•Exclusioncriteria
•Priority forcoding
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• Methodology– Design
– Type of results
• Conditions– Country
– Road user type
– Road type
– Traffic conditions
– Crash severity
• Tansferability
Repository Evaluation of Studies
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Repository Coding template
Core info
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Repository Database
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3. Synopsis
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Synopsis
• Key conclusion
• Overview
• Scientific summary
• Supporting background
• For risk-factors and counter-measures
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Synopsis: colour code
Risk factor Countermeasure
Red Results consistently show an increased risk when exposed to the risk factor concerned.
Green Results consistently show that the countermeasure reduces road safety risk.
Yellow There is some indication that exposure to the risk factor increases risk, but results are not consistent.
Light green
There is some indication that the counter measure reduces road safety risk, but results are not consistent.
Grey No conclusion possible because of few studies with inconsistent results, or few studies with weak indicators, or an equal amount of studies with no (or opposite) effect.
Grey No conclusion possible because of few studies with inconsistent results, or few studies with weak indicators, or an equal amount of studies with no (or opposite) effect.
Green Results consistently show that exposure to the presumed risk factor does not increase risk.
Red Results consistently show that this measure does NOT reduce road safety risk and may even increase it.
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4. Prioritisation
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PrioritisationEconomic Efficiency Evaluation (E3)
Output E3-calculator
Cost Effectiveness Analysis• Costs per crash prevented
(fatal, serious, slight, pdo)
Effectiveness
Saved crashes per unit
(fatal, serious, slight, pdo)
Time horizon
Costs of measures
Crash & casualty costs
(fatal, serious, slight, pdo)
Discount rate
Cost Benefit Analysis• Net present value
(benefits – costs)• Benefit-cost ratio
(benefit / costs)
User inputInfo on measures
SafetyCube inputInfo per country
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E3-calculatorEconomic efficiency evaluation
• SafetyCube examples
• User adapts SafetyCube example for own purposes
• Users’ analysis starts from scratch.
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E3-calculatorCrash costs
• Based on SafetyCube crash-cost collection
– Countries’ own reportedvalues
– Common methodology estimates per country
– EU standardized cost
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E3-calculatorCosts of counter-measures
• Costs for counter-measures can be adjusted from one country to another, by means of value transfer.
• Country
• YearCost in source
Cost 2015
Inflation correction
Cost in target
country, 2015
Price-level & currency correction
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SafetyCube E3 examplesSensitivity analysis
• Low / high measure effect• Lower CI
• Upper CI
• Low / high measure costs• - 50%
• + 100%
• Combined scenarios• Worst case
• Ideal case
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SafetyCube DSS
Road Safety Decision Support System
Measures
Risks
Taxonomy Repository Synopsis Prioritisation
![Page 21: The SafetyCube Methodology · The SafetyCube Methodology SafetyCube final conference Vienna, 22 March 2018. SafetyCube DSS Road Safety D ecision S upport S ystem Measures Risks Taxonomy](https://reader034.vdocuments.us/reader034/viewer/2022042222/5ec804de30841437b9670eff/html5/thumbnails/21.jpg)
6/26/2018
Co-funded by the Horizon 2020Framework Programme of the European Union
The SafetyCube Methodology
Heike Martensen
SafetyCube Final Conference
Vienna, 22 March, 2018