Cost–benefit analyses are an important analytical tool for road authorities to assess and prioritize road safety countermeasures, and commit funds that maximize road safety benefits. The aim of this study is to establish field-observed crash, injury, and cost data for run-off-road collisions with various fixed hazards and roadside infrastructure, and to derive accurate and reliable cost values for such objects for use in run-off-road cost–benefit analyses. Values are derived for passenger vehicle occupants and motorcyclists. Accurate cost data is vital to ensure cost–benefit analyses are rigorous and reliable. Data linkage between police-reported road crash, hospitalization, and personal injury insurance claim data collections is used to id...