Illegal U-Turn

What is the name of your state? Oklahoma

I was just pulled over for an illegal u-turn.

Me and my friend were driving down the road, we forgot something, turned to our right (used signal light) into a businesses' driveway. We were parallel style parked there and had come to a complete stop and were completely off the road. I then flicked on my left signal light, looked both ways, then turned out of the driveway and into the left lane going back to my friend's house. A cop then preceded to pull me over and write me a ticket for illegal u-turn. I asked him if I had not gotten over far enough, and he said no. I asked him how far I had to get over (respectfully, being a jerk gets you no where), he said "like if you were going to pull over there, you have to go through the circle drive all the way through" which means he has no idea, he couldn't list any specifics and the example he gave was very vague.

I looked at traffic laws in Oklahoma and could find nothing related to illegal u-turns, except when there is a sign posted; no sign was present.

This is a very big problem for me. I'm 16 years old and already have one ticket (failure to carry insurance, though I had it, wasn't my fault either, was my parents.). If this ticket goes on my record I'm pretty much screwed. I know the best course of action is to get my court date changed, but it is a small town and they have two court sessions a week. My only option is to show up and contest it.

I'm wondering if anyone else can find any laws related to illegal u-turns in
Oklahoma.