My question involves traffic court in the State of: California

I was coming out of a parking structure (police car behind me) and no signs were on my side of the street to not make a left turn. I made my left and about a block down the cop turns his light on. Apparently there was a sign to not make a left turn. He gave me the ticket (says I'm beautiful :roll eyes: ugh) and after he let me go I went back to the spot to see the sign. Across the street next to an alley way, there is a no left turn sign (very small, in front of a store, across four wide lanes), and there was no sign on my side of the street.

I have an arraignment for the 30th. What are the chances I will beat this ticket? Any advice on what to say while I'm there would be great!