According to QuoteWizard, the state ranked number 9. Iowa drivers ranked as the worst while California came in fourth.Some of the states ranked for the best drivers were New Hampshire, Kentucky, and Arizona. QuoteWizard analysts reviewed over two million car insurance quotes to rank each state based on four contributing factors: Accidents, DUIs, Speeding Tickets and Citations. Tennessee took the top spot when it comes to accidents, as drivers in this state got in more accidents than any other state. Michigan had the lowest number of accidents. Tennessee drivers also ranked high in most DUIs, coming in second behind Wyoming.