What is the purpose of a yield sign?

A yield sign serves a specific purpose related to traffic flow and safety. Its primary function is to indicate that the driver must give the right of way to other vehicles and pedestrians. This means that if there are approaching vehicles on the intersecting road, or if there are pedestrians in a crosswalk, the driver should slow down and be prepared to stop if necessary. The intent behind this sign is to promote a smooth transition in traffic and to prevent accidents, particularly at intersections where visibility might be limited.

The other options do not accurately describe the function of a yield sign. For example, a mandatory stop is indicated by a stop sign, while allowing traffic to proceed without stopping might pertain to various road situations, but not to the yield concept. Likewise, warnings about pedestrians are typically represented by pedestrian crossing signs rather than a yield sign.