I started riding a bike almost obsessively partly in response to all my friends being so single minded about "getting a license". I used to race them the mile to our high school (me on the bike them in their cars) and beat them hands down by drafting the lines of school buses that they would be stuck behind.
When I finally gave in and got my license at age 18 I was still using the bike to get most places and didn't buy a car for several more years. I was very aware of the vehicle codes as they pertained to cyclists by the time I was driving.