According to a study done in London by insurance company Cornhill Direct, up to 50 percent of British motorists would leave the scene without leaving their contact information if they hit another vehicle if they thought they could get away with it. Half of the 1,300 motorists interviewed were also identified as having been victims of untraced drivers. Additionally, the study showed that women were more likely than men to leave details, and younger drivers were least likely to leave their information.
Recognizing that the data might be biased, it would be interesting to see data from an independent source on the topic. I would be more interested to see U.S. numbers… How much are we paying in our own insurance premiums to fund "road runners?" England's numbers run about 30 pounds a year extra.