What does a solid white line on the road indicate?

A solid white line on the road indicates that lane changes are discouraged or prohibited. It serves as a visual cue for drivers to stay in their lane and maintain their current path of travel. This line is often used in scenarios where weaving or changing lanes could be dangerous, such as near intersections or in areas with heavy traffic.

The indication helps enhance safety by clearly marking the boundaries of lanes, preventing confusion among drivers about where they can and cannot drive. In contrast, the other options do not accurately reflect the purpose of a solid white line. A pedestrian crossing is typically indicated by different signage or markings, a speed zone is not designated by solid lines but usually by posted signs, and parking regulations are shown through signs or pavement markings specifically designed for that purpose.