What does it mean when a sign says "Road Closed"?

When a sign indicates "Road Closed," it signifies that the road is not passable. This means that vehicles, cyclists, and pedestrians are not allowed to enter that portion of the roadway due to safety concerns or other reasons, such as construction, flooding, or severe damage. The sign serves as a clear warning to drivers and other road users that they must find alternative routes, ensuring their safety by preventing access to potentially hazardous areas. Understanding this message is crucial for road safety; it helps prevent accidents or injuries that could occur if travelers attempted to navigate a closed road. The other options suggest situations where access may still be permitted, which contradicts the intent of the "Road Closed" sign.