What shape of traffic sign warns drivers to slow down when approaching an intersection?

Three-sided traffic signs are specifically designed to alert drivers to yield or slow down when approaching intersections. This triangular shape is universally recognized as a symbol indicating a warning, particularly related to upcoming traffic situations where caution is required. The three-sided shape helps it stand out among other traffic signs, reinforcing its importance to drivers.

This type of sign is typically positioned in advance of intersections where there may be a potential stop or where the right-of-way is uncertain, guiding drivers to adjust their speed and be prepared for crossing traffic or pedestrians. Understanding the purpose and shape of these signs helps ensure safe driving behavior and compliance with traffic regulations, as the distinct triangle shape serves as a clear visual cue to exercise caution in these critical areas.

In contrast, the other shapes mentioned serve different purposes. Pennant-shaped signs are often used to indicate no passing zones, while five-sided signs are specifically designated for school zones. Rectangular signs generally provide informative or regulatory information but do not specifically alert drivers to the need to slow down at intersections.