School Area Speed Limit and Signing
One type of school speed limit sign.
School speed limit signs vary among states, but their main objective is to alert drivers that they are entering a school zone and they need to slow down for school children. The MUTCD provides guidance for installing school area speed limit signs in school zones at a specified distance from marked school crosswalks or a certain distance from the edge of school property. The school speed limits typically range from 15 to 25 mph. These devices are important but should not be overused. Excessive and unreasonable use may lead drivers to ignore the devices.