Road Safety Impact Assessment (RSIA) is a professional procedure that evaluates the potential impact of a given project or initiative on the safety of road users. By performing an RSIA, decision makers are able to determine the likelihood and severity of potential risks posed by said project or initiative. The assessment should identify existing hazards, evaluate proposed countermeasures, and assess the expected improvement in road safety due to these countermeasures. This evaluation requires deep understanding of existing road safety conditions, as well as knowledge of current strategies and plans for promoting safe use of roadways. With this information, decision makers can ensure their projects are compliant with the highest standards of safety and efficiency.