From 1995-96 to 2008, average yearly mileage increased by 42 percent for drivers 70 and older, compared with a 21 percent increase for drivers 33-54.An Institute survey of 2,500 drivers 65 and older found that drivers with reported impairments in memory, vision, mobility and/or medical conditions such as arthritis or diabetes were more likely than other drivers to self-limit their driving by makin