How long has it been since you took a driving test? Ten years? Fifteen years? It's been closer to 20 for me. Think you could do it again? Right now without looking at a driving manual or sitting in a car? Okay hotshot, let's see you do it.
Here's a test of 20 questions from MSN taken from real licensing tests across the country.
I scored 85, with most states requiring a score of at least 80 to pass. If I remember right, that's pretty close to what I got the first time around when I was 16. Take the test and let me know how you score.