What does a no-entry sign mean?

A no-entry sign is a critical road sign utilized to indicate that vehicles are prohibited from entering a specific area of the roadway. This sign is often placed at the beginning of one-way streets, construction zones, or restricted areas where entry is not permitted for safety reasons.

When you see a no-entry sign, you must understand that it serves as a clear instruction to drivers that they should not proceed into the area indicated. Ignoring this sign can result in dangerous situations, as you may enter a roadway where oncoming traffic is present or may encounter an area that is unsafe for vehicles. It's essential to adhere to these signs to maintain the safety of both drivers and pedestrians in that vicinity.

The other choices suggest scenarios that either allow entry or require additional considerations, neither of which accurately reflects the clear and direct message of a no-entry sign. Hence, the correct interpretation is that you are not allowed to enter that part of the roadway.