Do you know your roots from your routes?  This fleet registered ADI offering advanced driver training doesn't seem to judging by his website entry:

...a test for one and a half hours over a variety of roots...

Well at least it gave me a good laugh first thing in the morning picturing all thoses drivers on all those roots!

Further down the entry, although not a spelling error, this sentence also gave me a good laugh with the visual imagery it created:

...the two main courses that cover this...

hmm...not sure if I'll go for meat and 2 veg or fish and chips!

When teaching in a middle school years ago, I once asked a question in maths, along the lines of, 'What is the angle opposite to the right angle?' and, quick as a flash (but deadly serious!) a child answered, 'The left angle'!  Stupid question, great answer!