To discover which states have the most dangerous and worst drivers, researchers at Car Insurance Comparison collected over 3,000 data points from the U.S. Department of Transportation's National Highway Traffic Safety Administration (NHTSA) and ranked all 50 states plus D.C. by the following chief categories:

• Fatality Rate: The number of traffic deaths for every 100 million vehicle miles traveled
• Failure to Obey: Deaths involving failure to obey traffic laws (not wearing seat belts, ignoring traffic signals, or driving without a valid license)
• Drunk Driving: Traffic fatalities involving alcohol-impaired drivers
• Speeding: Deaths involving motorists who were speeding
• Careless Driving: The number of bicyclists and pedestrians killed by drivers for every 100,000 residents

The rankings for each of the five categories above were then totaled to achieve the final scores for all 50 states plus the District of Columbia. Researchers note that the states with the 10 highest cumulative rankings and lowest scores in each category comprise the ten states with the worst drivers in the U.S. In the slideshow above, discover which 10 states were ranked to have the worst drivers in 2019. See also:

• The worst states for speedy drivers
• The 10 most dangerous states for pedestrians