What roads are the most dangerous in America, and why? In 2020, the United States had its highest rate of traffic deaths since 2007, at 1.37 fatalities per 100 vehicle miles traveled, according to the National Highway Traffic Safety Administration.

That is 42,060 traffic deaths in 2020, rising from 39,107 the year earlier. That spike increased even as the number of miles traveled by car decreased by 13 percent from 2019, citing the biggest single-year spike in US car fatalities in almost a century. So what highways are the most dangerous in the US, and which should you avoid?