Inspired by the Safe System philosophy and Vision Zero, the road transport system is considered a dynamic system consisting of the road infrastructure, the people who use it, and the vehicles which traverse it. At the core of the Safe System are road users, who are both fallible and vulnerable to fatality or serious injury. Their interaction with each other, with the road environment and with vehicles and vehicle systems, are key to the probability of collisions and injury severity. By focusing on these interactions and mitigating human error with technology, collisions and the severity can be reduced.