If you see a solid white line between lanes of traffic, what does this indicate?

A solid white line between lanes of traffic indicates that you must stay in your lane. This line serves as a visual guide that discourages lane changes because doing so could disrupt the flow of traffic and potentially lead to unsafe driving conditions. The presence of a solid white line suggests that the lanes are intended to maintain separation for safety reasons, often in areas where merging or changing lanes could be hazardous, such as near intersections or in high-traffic zones. Maintaining your lane helps ensure predictable movements for all vehicles on the road, enhancing overall safety.

Other choices, such as changing lanes or passing vehicles, are not permissible when a solid white line is present, as this could cause confusion and increase the risk of accidents, particularly in busy traffic areas. Increasing speed is also counterproductive when lane changes are restricted, as it could lead to aggressive driving behaviors or further complicate traffic patterns.