What type of signage is used to warn drivers about construction zones?

The use of orange, diamond-shaped or rectangular signs is specifically designed to alert drivers about construction zones. These signs are part of a standardized system that enhances visibility and signifies that road work is taking place ahead. The color orange is universally recognized as a cautionary indicator, particularly in the context of road construction and maintenance, conveying the message that drivers should be prepared to slow down or change their driving behavior in response to potential hazards.

In contrast, red circular signs are typically used for stop or yield indications, blue square signs are generally associated with service-related information, and yellow triangular signs serve as warnings for yield situations. Each of these sign types has its specific purpose; however, only the orange diamond-shaped or rectangular signs serve the critical function of warning drivers about upcoming construction zones. This specificity is why the orange construction signs are utilized and recognized in traffic management and driver safety protocols.