kollisionriskbedömning

Kollisionriskbedömning, Swedish for collision risk assessment, refers to the systematic investigation of factors that contribute to vehicle collisions on road networks. The goal is to identify high‑risk locations, analyze root causes, and recommend engineering, enforcement, or educational interventions to reduce accidents. The method combines data from accident reports, traffic counts, GIS mapping, and road geometry analysis. Analysts often use statistical models such as Poisson regression or Bayesian Hierarchical models to estimate collision rates and evaluate the relative impact of variables like speed limits, lane widths, visibility, and traffic volume. Software tools such as S-Cone, BEST, and custom GIS extensions support spatial clustering and risk mapping. In Sweden, the process is guided by the Road Safety Act and the Ministry of Transport’s Road Safety Strategy, which mandate regular risk assessments for major arterials and expressways. Outcomes include hot‑spot maps, priority lists for infrastructure upgrades, and evidence‑based policy recommendations. By systematically quantifying collision risk, authorities can allocate limited resources more efficiently, monitor safety performance over time, and align local strategies with national and European road safety objectives.