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Drivers with vehicles registered in D.C. and Maryland were involved in the majority of collisions that occurred inside the city in 2012, according to a report from Howard University’s Transportation Safety Data Center. But who’s at fault for these incidents? That’s not as clear.

In 2012, there were 29,725 collisions reported to the Metropolitan Police Department in D.C. Of those incidents, D.C. drivers were involved in 11,007, or 37 percent. They’re followed by Maryland drivers (9,838/33.1 percent) and Virginia drivers (4,106/14.1 percent). Other came in at 8.6 percent and unknown at 7.5 percent.

While AAA Mid-Atlantic frames the report with the headline “Who are the city’s worst drivers?”, there’s nothing in the data that shows who was at fault. The numbers simply show who was involved. Perhaps D.C. drivers are involved in more collisions because, oh I don’t know, they live in the city and spend more time on the streets!

There is information about the cause of the incident from DDOT: “The top three drivers’ actions that are responsible for crashes in 2012 were: going straight, turning left, and changing lanes, which represent respectively (approximately) 49 percent, 12 percent and 8 percent of the total crashes.”