On the ticket the officer marked the reason for my school zone speeding ticket as "Construction Zone" instead of "School Zone."

I have proof from city engineers that there was no permit for construction at the time of the ticket, so the construction charge would not stand up in court. The problem, however, is that the ticket time is written as 8 minutes before the school zone time would be over (says I got it at 3:57 pm, zone ends at 4:05 pm), which would make it a school zone violation even without it being marked as one. I feel it was later than 4:05 pm when I got the ticket though (I have no proof of this unfortunately). Do you think I can cite his incorrect marking as extra proof he may not have been paying much attention, and gotten the time wrong?