What does a solid white line on the road mean?

A solid white line on the road signifies that changing lanes is discouraged or prohibited. This marking is especially relevant in situations where lane changes could create hazards, such as on highways or in areas where traffic flow and safety must be carefully managed.

The presence of a solid white line serves as a visual reminder to drivers that they should remain in their current lane, as straying or attempting to change lanes might interfere with the movement of other vehicles and increase the risk of accidents. This is particularly important in areas where lane discipline is crucial for maintaining safe traffic operations.

While other options refer to different road markings or guidelines, a solid white line specifically serves the purpose of regulating lane changes to enhance roadway safety.