What does a "Road Closed" sign signify?

A "Road Closed" sign indicates that the road is not passable and must be avoided. This sign is used to warn drivers that the roadway is completely blocked to all traffic for safety reasons, which could be due to a variety of situations such as severe weather damage, ongoing repairs, or hazardous conditions. The intent of the sign is to prevent vehicles from attempting to access a section of road that could pose risks, ensuring safety for both drivers and any workers or equipment that may be present in the area.

The other options do not accurately represent the implications of a "Road Closed" sign. For example, designating the road for emergency vehicles only or declaring it open for all traffic contradicts the intention behind the road closure. Similarly, stating that the road is under construction could imply that it might still be open to some traffic, which is misleading when a "Road Closed" sign is present.