What does a double solid white line indicate?

A double solid white line is a traffic control marker that indicates lane changes are not permitted. This type of line is meant to maintain traffic flow and safety by clearly indicating to drivers that crossing this line to change lanes is prohibited. It helps prevent sudden movements that could result in accidents, as it often marks the boundary between lanes that serve different purposes or where lane changes might be too dangerous.

In contrast, a single solid white line allows for lane changes in certain conditions, while dashed lines indicate that lane changes can be made when safe. The other options concern aspects of road use that do not relate to the function of double solid white lines, such as passing rules or parking regulations, further reinforcing the importance of understanding these markings for safe driving practices.