This document discusses road safety and road safety engineering. It notes that over 1.3 million deaths occur each year from traffic accidents, with 90% occurring in low and middle income countries. Road safety engineering aims to modify the physical road environment to reduce risks for all users. It involves road design, traffic engineering, analysis, and applying techniques like proper super elevation, pavement structure, traffic signs and signals, and designing intersections and interchanges. The goal is to counteract forces that could cause vehicles to overturn or skid and help ensure safe travel.