Since there are some parts of being a 14 year old boy I've never outgrown, you will be unsurprised what my first question was for my niece, the new EMT. Her answer:
... and no, I haven't driven more than 100 mph yet. I tried! But there's a safety feature on the ambulances - you can't go over 90, so I've done that a few times.
(Hope her mom is still boycotting my blog.) ;)