PHOENIX - For the third straight year, Phoenix sits atop Allstate's crash study list of the safest big cities in the country.
The insurance company says Phoenix drivers average an accident once every nine-point-eight years, which is slightly more frequent than the national average.
Phoenix' ranking is for cities with a (m) million or more residents.
Allstate analyzed two years of internal crash data to calculate the chance that drivers in 200 of the nation's most populated cities would be involved in an accident.
For the second straight year, Sioux Falls, South Dakota, has the safest drivers overall, with the average driver there having an accident once every 13-point-seven years.
Tucson is ranked Number Eight among cities with 500,000 to one (m) million residents. Tucson motorists have an accident an average of once every ten-point-four years.