The number of people killed in crashes dropped to nearly 33,000 last year. That's the lowest number the National Highway Traffic Safety Administration has seen since 1949.
Even though drivers put about 20 billion more miles on their cars in 2010, fewer drivers were killed in highway collisions than the year before.
Some traffic officials say that could be because more drivers are buckling up and cars are now equipped with newer technology when it comes to antilock brakes and airbags.
Overall, Washington, D.C., is known for having some of the safest roadways in the country, but has been pegged as one of the worst U.S. cities when it comes to traffic.