What constitutes a construction zone sign?

The correct sign indicating a construction zone is an orange diamond-shaped sign. This shape and color are specifically designated to alert drivers to road construction and maintenance activities ahead, signaling them to reduce speed and exercise caution. The use of orange is universally recognized for construction-related hazards, making it clear to motorists that they need to be vigilant and prepared for potential disruptions in the roadway.

In contrast, other colors and shapes serve different purposes. For example, yellow rectangular signs typically convey warnings about road conditions or hazards but are not specific to construction. Green signs provide guidance and directional information. Blue circular signs are used to indicate services available to motorists, such as rest areas or gas stations. Understanding the distinct meanings associated with different signs is crucial for road safety and compliance with traffic regulations.