D.C. drivers are more likely to be in auto accidents than drivers in any other city in the country, and Alexandria and Arlington drivers follow closely behind, according to a new study.

D.C. drivers average one accident every 5.4 years, making them almost three times more collision-prone that drivers in Sioux Falls, S.D., which ranked as the safest driving city in the 2008 Allstate America’s Best Drivers report.