What does a triangular road sign primarily indicate?

A triangular road sign primarily indicates caution or warning. This type of sign is designed to alert drivers to potential hazards or changes in road conditions ahead. The shape and color of the sign (typically red border with a white or yellow center) are standardized to ensure quick recognition by drivers, prompting them to reduce speed or be prepared for obstacles that may require special attention.

For instance, a triangular sign may warn of upcoming sharp turns, merging lanes, animal crossings, or roadwork ahead. The universal recognition of these signs helps maintain safety on the roads by encouraging drivers to stay vigilant in areas where caution is necessary.

Other types of signs serve different purposes, such as mandatory instructions or information about services, which do not convey the same sense of immediate caution required in certain driving conditions.