Lane lines are the painted markings on roads that help guide drivers and maintain order in traffic. They indicate where vehicles should stay while driving, helping to prevent accidents and ensure smooth movement. Lane lines can be solid or dashed, with solid lines typically indicating that changing lanes is not allowed, while dashed lines allow for lane changes. In addition to guiding vehicles, lane lines also play a crucial role in traffic safety and road design. They help organize traffic flow, making it easier for drivers to navigate intersections and merge onto highways. Properly maintained lane lines are essential for safe driving conditions.