Which type of sign typically warns drivers of a sharp curve ahead?

Warning signs are designed specifically to alert drivers to potential hazards and changes in road conditions ahead. A sign that indicates a sharp curve is a clear example of a warning sign, as it prepares drivers to reduce their speed and navigate the road safely. These signs are usually yellow and feature a symbol that conveys the nature of the hazard, such as a curved arrow indicating the direction of the turn.

In contrast, speed limit signs inform drivers of the maximum allowable speed on the road but do not specifically indicate road conditions or hazards. Regulatory signs impose laws and regulations that must be followed, while informational signs provide additional details about road conditions or points of interest, such as rest areas or directions. Thus, the primary purpose of a warning sign is to raise awareness of specific dangers, making it the appropriate choice for describing a sign warning of a sharp curve ahead.