Learn how transportation engineering impacts road safety and discover tools for reducing crashes and injuries. The Road Safety Engineering module is organized into the nine categories listed below which, taken together, can guide you through the process of identifying the pertinent safety-related issues in your community, and how to identify solutions for both high-risk areas and systemwide risks. The modules provide an introduction to state-of-the-art methods for identifying hazardous locations, diagnosing crash causes, selecting countermeasures, and evaluating the costs and benefits of alternative solutions.