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A road safety performance indicator for vehicle fleet compatibility
Michiel Christoph1, Martijn Alexander Vis, Lucy Rackliff
1SWOV Institute for Road Safety Research, The Hague, The Netherlands.
Accident; Analysis and Prevention
|August 20, 2013
Summary
A new safety performance indicator assesses vehicle fleet intrinsic safety based on vehicle type composition. The UK leads in fleet safety, while Greece shows the poorest performance according to this novel metric.
Area of Science:
- Road Safety
- Transportation Engineering
- Vehicle Dynamics
Background:
- Vehicle fleet composition significantly impacts road safety outcomes.
- Existing safety indicators may not adequately capture intrinsic fleet safety related to vehicle mix.
- A need exists for a specific metric to evaluate the influence of vehicle types on collision severity.
Purpose of the Study:
- To develop and apply a novel safety performance indicator (SPI) for assessing intrinsic vehicle fleet safety.
- To quantify the impact of vehicle fleet composition on road safety.
- To rank European countries based on their vehicle fleet's intrinsic safety performance.
Main Methods:
- Developed an SPI considering relative collision severity between vehicle types and their fleet share.
- Calculated relative severity based on vehicle mass.
- Applied the indicator to passenger cars, heavy goods vehicles, and motorcycles across 13 EU Member States and Norway.
Main Results:
- The developed indicator effectively measures intrinsic fleet safety due to composition.
- The UK demonstrated the best fleet composition safety performance (SPI=1.07).
- Greece exhibited the worst performance with the highest indicator value (SPI=1.41).
Conclusions:
- The new SPI is a valuable tool for evaluating intrinsic vehicle fleet safety.
- Fleet composition is a critical factor influencing road safety performance.
- The indicator provides a basis for targeted interventions to improve road safety through fleet management.
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