Mate make a backUp folder and cut the schoolzone files from the speedcam folder and paste them in backUp folder for safe keeping. The school zones are embedded in the map and they only appear during the school zone times and you get the voice message "caution kids about"
Try that and see if it works with yours. Pointer though, when travelling in the country the message "caution kids about" is quoted at school bus stops and there is no time restrictions.
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