What does a posted speed limit in a school zone require, and when is it typically in effect?

A school zone speed limit is a reduced limit that protects children near schools. It typically applies during posted times (such as school arrival and dismissal hours), when warning lights are flashing, or whenever children are present, depending on how the zone is signed. Drivers must slow to the posted school-zone speed and watch carefully for children, crossing guards, and school buses. Violations in school zones often carry increased penalties. The exact hours and conditions are shown on the signs. Reducing speed and staying alert in school zones is an important rules-of-the-road safety requirement.