What does a warning sign indicate?

Answer: B — Potential hazards ahead that require caution

A warning sign indicates potential hazards ahead that require caution because its primary purpose is to alert drivers about conditions where they need to be more vigilant. These signs are typically yellow with black symbols or text, making them easily recognizable. They notify drivers to reduce speed, be ready to react, or employ caution in various situations such as sharp turns, pedestrian crossings, or slippery roads. This understanding is crucial for safe driving, as it prepares drivers for changes in the driving environment that could impact their safety. For example, encountering a warning sign for a curve ahead encourages the driver to slow down and navigate the turn safely, reducing the risk of an accident. In contrast, other choices relate to specific traffic regulations or scenarios rather than general caution. For instance, a speed limit change sign informs drivers about changes in the legal speed they should adhere to, a stop sign requires drivers to come to a complete stop, and a sign indicating road construction advises of active work zones. While these are important, they serve different purposes than the broader alert provided by warning signs.