It should be 30.
seeing how anyone over that age is old.

Although, in all seriousness, I think that people who took their tests a significant time ago (ie when roads were less crowded and cars were less technologically advanced) should have to take a stripped down test.
( Master Of Turnips. Only gays and morons believe in ghosts., Tue 16 Jun 2009, 13:27, archived)

Agreed
I was about to say something along those lines; not because older people are incapable drivers or anything, but because factors change such as car prowess and brake reaction distance as one ages.

My grandad's 73 and hasn't had a re-test yet, he's in the pinnacle of health but his driving definitely isn't what it used to be.
(theneet began to cut her hair and long for balls, Tue 16 Jun 2009, 13:29, archived)