Professor Dinesh Mohan passed away on 21 May 2021. Mohan was one of the world’s leading experts on traffic safety issues and human tolerance to injury. His work has significantly advanced motorcycle helmet design, pedestrian and bicyclist safety and child restraint regulations, and helped develop safer ways for various modes of transportation to safely share the roadways. During his distinguished career he was the recipient of many honours and awards, including the 1991 International Association for Accident & Traffic Medicine’s International Award and Medal for Outstanding Achievement in the Field of Traffic Medicine.