One of my Aunts. in her 80s, amazing that my Uncle made it long enough to die of natural causes. Most people won't get in a car with her driving twice. Snowbirds to Florida from northern NY - was banned from driving thru North Carolina for three years.

I rode with her driving once. Pays no attention to anything outside car. Changes lanes without checking for other cars. Will make turns across multiple lanes of traffic (like left turns from far right lane on 4 or 6 lane roads). Will only check driver's side mirror when backing up, and can't back straight. Last minute braking. Drives speed limit or above, so no little old lady speeds to help warn other drivers.