is the wrong information on the ticket enough to get it thrown out?

Question Details: I was pulled over by my house on my way to work two weeks ago. Most of the city is located in King County in WA, while my neighborhood is right on the border in Pierce County. I got a ticket for going 6 over in a school zone and he gave me a $234 ticket despite my perfect driving record I had never even been pulled over. On my ticket he listed Auburn as the city correct but King County as the county and referred it to King County Municipal Court. I had just turned the corner onto the school zone street and slowed down when I got to his speed trip, not 100 feet from the school one sign, which was flashing. I was back down to 20 by the time he pulled out and turned his lights on. I was also directly behind someone so I couldn't have been going that fast unless that person was also speeding. It was 5 or 6 minutes before school starts I used to teach at that school so all crossing guards and student walkers were already in school. The top of the flashing sign was also covered by tree branches so you an only see the bottom one. It was a bush league ticket and I don't believe I should have been ticketed for all the reasons listed above. Between the wrong county on the ticket, the time and lack of students and crossing guards, the partially hidden school zone sign and the fact that I had slowed down and was following directly behind someone, do I have enough to successfully contest the ticket, in your professional opinion?

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