Research suggests that self-driving cars crash significantly less often than human-driven cars, with some studies showing a 92% reduction in fatal or serious-injury crashes. Advanced driver assistance systems (ADAS) are also reducing occupant and pedestrian injuries and deaths. However, there are still no national performance or safety standards for autonomous vehicles, and a lack of data makes it difficult to compare crash rates. The development of autonomous vehicles is seen as a critical public-health intervention, with the potential to save thousands of lives per year.