Add to ORKGPhotograph used for a story in the Daily Oklahoman newspaper. Caption: "School Slow Zone! Black letters on yellow diamond shaped signs will be placed on parkings early Tuesday morning to remind motorists that school days are here again. Warning signs mean that motorists must slow to 20 miles and hour and passing is not allowed. School safety director Lonnie Gilliland also reminded motorists that many flickering amber signs will be changed red at times when children are crossing streets to get to classrooms before the tardy bell rings. Dr. Jack F. Parker, superintendent of Oklahoma City schools, said many employees worked during the Labor Day holiday. Bobby Wayne Robertson, 2016 N Lee, ponders Tuesday's school opening.