Rules of the Road Posted On February 3, 2015 Tweet Facebook Gmail Linked In School Zones When traveling in school zones, stay alert for children who are walking or playing near the road. Children sometimes chase their friends in a playful way, often without regard for nearby traffic. 20 miles per hour on school days when children are present. Usual school hours are 7 am to 4 pm, but hours may vary-sometimes a flashing light may warn you of extended hours during which the school zone speed limit applies. Cellphone or wireless devices prohibited within posted school speed zones. School zones are marked with special signs such as the two signs shown.