Can Safe Driving Patterns Be Identified? An Exploratory Analysis
Dimitrios I. Tselentis (TU Delft - Technology, Policy and Management)
Eleonora Papadimitriou (TU Delft - Technology, Policy and Management)
Arturo Tejada (TNO, Eindhoven University of Technology)
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Abstract
In order to improve road safety, recent studies suggest that it is important to study and identify the optimal driving benchmarks that reflect the safest driving behaviour that may be observed by human drivers. The objective of this paper is to identify boundaries of risky and typical driving by studying the car-following driving behaviour. The data used in this study was collected by TNO in a recent naturalistic driving study. The distributions of driving metrics related to the following and leading vehicle were illustrated to understand their shapes and outliers. The safety-related car-following driving metrics of Time to Collision (TTC), Deceleration Rate to Avoid the Crash (DRAC), Crash Index (CI) and over-speeding were calculated, with risky thresholds obtained from the literature, and typical driving thresholds based expert assessors’ ratings. Principal Component Analysis (PCA) was applied to these metrics and showed that ‘optimal driving’ can be represented by one linear component that represents over 95% of the total dataset’s variance.
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