What does a no passing zone sign look like?

A no passing zone sign is specifically indicated by a solid yellow line alongside a "No Passing Zone" sign. This visual cue is crucial because it communicates the regulation that drivers should not attempt to pass other vehicles in that area, typically due to safety reasons such as visibility limitations or the presence of curves. The solid yellow line signifies that it is unsafe to cross over to the opposite lane, reinforcing the directive of the accompanying sign.

In comparison, the other options depict various roadway markings and signs that do not represent no passing zones. A broken white line generally indicates that passing is allowed and is used to separate lanes moving in the same direction. A solid white line also signifies that changing lanes is discouraged or prohibited, while a green sign with white text usually provides informational guidance or direction, not specific traffic regulations such as passing rules.