What is the difference between the rectangular 'Do Not Pass' sign and the yellow pennant-shaped warning sign?

The correct choice highlights a key distinction between the two types of signs. The rectangular 'Do Not Pass' sign specifically indicates that drivers are not allowed to pass other vehicles in the area where the sign is posted. This regulatory sign is typically placed on the right side of the road to inform drivers of this specific restriction.

On the other hand, the yellow pennant-shaped warning sign serves as a precautionary reminder, indicating that drivers are approaching an area where passing zones change, typically warning them to be alert and exercise caution. Its shape and color are designed to catch the driver’s attention and signal that certain behaviors—like passing—may not be safe.

This differentiation in shape and placement indicates both the function of each sign and where they will be found in relation to driving lanes. Understanding these signs is crucial for ensuring safe driving practices and obeying traffic laws.