What should a driver do when they see a single solid white line?

A single solid white line on the roadway serves as a directive to drivers regarding lane usage. It indicates that changing lanes is not permitted. This line is typically used in areas where lane changes could be hazardous, such as near intersections, at the approaches to freeway ramps, or in areas where there are high pedestrian activities.

By understanding this, a driver can avoid making unsafe maneuvers that could lead to accidents. This guideline helps ensure the safety of all road users by maintaining orderly flow of traffic and reducing the risk of collisions that might occur if lane changes were allowed in areas where visibility or space is compromised.

Drivers are instead expected to remain in their lane until it's safe to change, at which point they would look for a broken white line that indicates changing lanes is permissible. Other scenarios, such as making a full stop or passing vehicles, are not applicable when a solid white line is present, as they contradict the rules indicated by the road markings.