Ontario Highway Traffic Act

I received a "disobey stop sign" ticket 136(1)(A) as I made a left-turn at a 3-way stop. There's dashboard camera video, and my wheels do not stop.

So I have a few questions before the trial date:
1) It's my first offence in 16 years of driving. I'm concerned about the demerit points. I was busy looking for pedestrians and noticed the police ...