What does a double solid white line indicate?

A double solid white line serves a specific purpose in traffic control and road safety. It indicates that lane changes are not allowed. This means that drivers should stay in their current lane and not attempt to cross over the lines. The presence of this marking is an important visual cue designed to maintain traffic flow and safety, particularly in situations where lane changes could lead to increased risk, such as in heavy traffic or near active intersections.

Understanding this marking is crucial for safe driving, as making an illegal lane change can lead to accidents or traffic violations. The other options relate to different types of markings or signs that denote other driving behaviors or regulations, but they do not apply to the specific meaning of double solid white lines.