Over the next two years as on-road pilot programs and testing increase, self-driving vehicles will continue to move from novelty to closer to reality, meaning more drivers are likely to encounter them. Regulators must establish guidelines that ensure self-driving test vehicles are identifiable and consistent in their actions while on the road with human drivers, cyclists and pedestrians. Doing so will enhance people’s trust in self-driving vehicles while paving the way for drivers to safely interact with automated vehicle technology.