What type of sign alerts drivers to construction zones?

The type of sign that alerts drivers to construction zones is represented by an orange diamond shape. This design is specifically designated for construction and maintenance warning signs to ensure maximum visibility and attention from drivers. The use of orange signals caution due to the potential hazards present in construction areas, such as workers, heavy machinery, and altered road conditions.

In contrast, the other shapes and colors have different meanings: blue square signs typically indicate services available to travelers, green circular signs provide information about directions or distances, and red triangular signs indicate yield conditions to drivers. Understanding the significance of these signs is crucial for maintaining safety on the roads, particularly in areas where construction activities are occurring.