What does a solid white line on the road indicate?

A solid white line on the road serves as a lane boundary, indicating that drivers should not cross it. This helps maintain a clear delineation between lanes, ensuring safety and organization on the roadway. It is particularly important in situations where changing lanes may be hazardous or discouraged, as it alerts drivers to stay in their designated lane.

In contrast, the other options imply different meanings. For instance, a lane merge scenario typically utilizes broken lines or signage rather than solid lines, indicating where and when it is safe to change lanes. Road work zones often employ various signage and sometimes different colored lines to alert drivers to reduce speed, rather than using solid white lines. Lastly, an end-of-lane situation would more likely use a different type of line or signaling to indicate that drivers should prepare to stop, rather than a solid white line which emphasizes lane integrity. Understanding the significance of lane markings is crucial for safely navigating roads and adhering to traffic laws.