The goal of this study is to investigate the association between a set of KPIs and final outcomes, i.e., crashes and injuries – in other words, checking how the KPIs measure road safety performance. While diploma theses by Konstantopoulos (2023) and Papagianni (2023) explored these associations using the Baseline KPIs and linear regression, the present study will use the most recent Trendline KPI data and a more suitable negative binomial regression. The modelling and statistical significance testing are expected to reflect the explanatory value of individual KPIs, i.e., checking which KPIs really measure road safety performance and how much. This may also enable discussing the potential reduction of the collected KPIs.
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