No visible school zone signs for drivers on univ. drive turning left on to the 12th street (school zone location). Officers waiting on Dufferin Ave and 12th Street intersection to speed trap. Officer’s response when informed that no visible school zone sign for drivers from Univ. Drive is usually “you were staring at the school building” (side of the school with just a red brick wall) or “you were facing the school playground” (untrue) or “you have lived in Saskatoon long enough to know that this is a school zone”.