What is the shape and color of signs indicating active work areas on highways?

The signs that indicate active work areas on highways are indeed diamond-shaped and orange. This specific shape and color scheme is designed to alert drivers to construction zones and road work, thereby enhancing visibility and ensuring the safety of both motorists and workers. The diamond shape is used for warning signs, which is effective in capturing attention and conveying the need for caution. The bright orange color further emphasizes the presence of these potentially hazardous conditions, making it easily recognizable in various weather and lighting conditions. This color association ensures that drivers are aware of upcoming changes in road conditions, such as detours or lane closures, requiring them to slow down and proceed with care.