In what situation would you likely see a triangular sign?

A triangular sign is generally used to indicate a warning. In the context of traffic signs, one of the most common uses of a triangular sign is to alert drivers to the presence of slow-moving vehicles. This helps ensure that drivers are prepared to adjust their speed and driving behavior when encountering vehicles that may be traveling at lower speeds, especially on rural roadways or during farming activities.

The other options represent signs that typically have different shapes. For example, signs indicating an intersection ahead are commonly in the shape of a diamond, while highway exit signs are usually rectangular. Likewise, school zone signs can come in various formats, often using specific symbols to alert drivers to their presence. Understanding these specific shapes and their meanings helps drivers interpret the road signs accurately and respond appropriately to different traffic situations.