What type of sign is used to indicate construction areas?

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Construction areas are indicated by orange signs. This color is specifically chosen for its high visibility and association with caution and safety, which is essential in environments where roadwork is taking place. Orange signs alert drivers to temporary changes in road conditions, potential hazards, or detours due to construction activities.

The other colors serve different purposes in traffic signaling: blue typically indicates services and amenities, white is often used for regulatory signs, and green is used for directional information. Thus, orange stands out as the correct choice for construction zones, as it conveys the need for alertness and caution during such conditions.