Even though people didn't drive a lot last year, traffic deaths actually increased by the largest margin in the last 13 years.36,680 people died in crashes last year, an increase of 7% from 2019.The National Highway Traffic Safety Administration says it's because fewer people were on the roads. So, more people started speeding, not wearing seat belts or driving under the influence.Miles traveled by vehicle fell 13% in 2020 from 2019.