This bulletin investigates the efficacy of various engineering interventions in reducing traffic accidents and improving road safety outcomes. The author, Leif Linderholm, utilizes empirical data and comparative analysis to evaluate how specific physical modifications to road infrastructure influence driver behavior and collision rates. The text provides a technical framework for engineers and planners to assess the performance of safety measures in diverse traffic environments.

The subject matter points to a technical, specialist text intended for civil engineers and transportation safety researchers. The framing suggests a data-driven approach to infrastructure evaluation, prioritizing empirical evidence over theoretical speculation.