What do double solid white lines on the road represent?

Double solid white lines on the road indicate that traffic is moving in the same direction. These lines serve to separate lanes of traffic where lane changes are discouraged or prohibited, reinforcing the idea that vehicles should remain in their designated lanes without attempting to cross over. This is particularly important for maintaining safety and orderly traffic flow, especially in areas where lane changes may create hazards, such as near intersections or in areas with specific traffic patterns.

While the other potential answers touch on various aspects of road markings—such as no passing zones represented by different line patterns and pedestrian crossings usually indicated by specific signage or markings—the primary function of double solid white lines is to dictate that all vehicles in adjacent lanes are moving in the same direction while discouraging any lane-changing maneuvers.