What is the purpose of solid white lines on the road?

Solid white lines on the road serve specific purposes related to traffic safety and regulation. One of the key functions is to indicate areas where lane changes are discouraged or prohibited, particularly near intersections. This design is implemented to enhance safety by ensuring that vehicles do not switch lanes in potentially hazardous locations, where drivers may be less able to see approaching traffic or pedestrians.

While the other options touch on various road markings, they do not reflect the primary purpose of solid white lines. For instance, separating lanes of traffic moving in opposite directions is typically indicated by solid or broken yellow lines. Indicating pedestrian zones usually utilizes different markings, while parking areas are typically denoted by other types of lines or signs. The solid white line's role in preventing lane changes near intersections is crucial for maintaining orderly and safe traffic flow, ensuring that drivers are following regulations designed to minimize the risk of accidents.