GUN violence in America gets plenty of attention, but cars kill more. Around 40,000 people a year die on American roads, more than all fatalities caused by firearms (of which two-thirds are suicides, not homicides). The death rate in America, around 12 people per 100,000, is more than twice that of western Europe. The grim toll of motor-vehicle deaths is widely seen as unavoidable, given that the United States is a large, sprawling country primarily designed around the automobile. However, around a third of these deaths involved drunk drivers, suggesting that there is, in fact, substantial room for improvement. And fortunately, it appears that the advent of ride-hailing apps like Uber and Lyft has had a welcome impact on road safety.