What type of sign is used to indicate school zones?

School zones are indicated by yellow diamond signs with black text to ensure high visibility and alert drivers to potential hazards. The yellow color signifies caution, and the diamond shape is used universally to communicate warnings. This design draws attention and effectively conveys important information about slowing down and driving carefully in areas where children are likely to be present, such as near schools.

While regular traffic lights guide and control traffic flow, they do not specifically mark school zones. Flashing red lights typically signal that drivers must stop, often found at railroad crossings or in emergency situations, and are not used for school zones. White rectangular signs with black text convey regulations or provide information, but they are not the standard for warning drivers of school zones. Thus, the yellow diamond sign is the most effective and appropriate choice for these specific environments.