MrJamie
Oaf on a Bike
I know this is a horrible generalisation, but I find it's older people who tend to take their time around me while cycling, wait behind me on country roads if the bend is blind and its usually younger people who terrify me with blind overtakes, squeezes and close passes.I've had more trouble with younger drivers then older ones.
(Edit

That said in my parents' social circle (of pensionable age), they're forever worried about various friends' driving. It's shocking how quickly someone can go from fully able and of sound mind to being frankly dangerous behind the wheel. Thankfully most of the 'incidents' have been 'last of the summer wine' hilarity in nature. They do usually give up driving, but because it's seen as losing independence and the alternatives can be pretty poor they really do put it off as long as possible.