What must drivers do when turning left on a highway with a solid white line?

When drivers encounter a solid white line on a highway, it is important to understand that this marking indicates that lane changes or crossing the line is discouraged. Therefore, the correct approach when turning left is to do so only at designated locations such as intersections or driveways. This regulation helps maintain the flow of traffic and ensures safety, as it prevents drivers from making potentially hazardous turns where they are not permitted.

Turning left only at intersections or driveways allows for better traffic management and reduces the risk of accidents that could occur if drivers were free to cross the solid white line at any point. Consequently, adhering to this guideline is essential for safe driving practices.