both ends of the spectrum need sorting. 17 year olds drive like hell, no experience, just know where the throttle is, silly old sods may drive slower, but their reaction time is also slower, and, I see people who are unable to walk unaided, hobble out of the health centre, take ten minutes to reach a car, then get in and DRIVE! Can that be safe??? no one wants to give up driving, and there are probably lots of very elderly good drivers out there, but surely common sense must prevail at some point and a retest should be mandatory for anyone over a certain age, perhaps 75, a bit older than the new retirement age.