What type of sign would indicate a stop at an intersection?

The octagonal red sign is universally recognized as a stop sign. This shape, along with its red color, is specifically designed to alert drivers that they must come to a complete stop at the intersection before proceeding. It serves to enhance safety by clearly signaling to drivers that they need to pause and assess the traffic conditions, allowing them to make informed decisions about when it is safe to continue.

In contrast, a yield sign typically indicates that drivers should slow down and yield to oncoming traffic, but it does not require a complete stop. Square green signs are used for informational purposes, such as indicating directions or distances, rather than traffic control. Circular yellow signs are generally used to warn of upcoming hazards or changes in driving conditions, but they do not instruct drivers to stop. These distinctions help ensure that drivers understand the correct actions they need to take at various points in their journey.