What does a solid white line on the road indicate?

A solid white line on the road indicates that lane changes are discouraged. This type of line is used to convey that traffic should remain in its lane and that changing lanes could be dangerous. Driving next to a solid white line suggests that the driver should be cautious about making lateral movements, as doing so could lead to unsafe situations, especially in areas with heavy traffic or when approaching intersections.

The solid white line serves as a boundary to promote safety by guiding drivers to maintain their lane and avoid unnecessary lane changes. This is particularly important in situations where the road may become narrower or where adjacent lanes may have differing speeds or types of vehicles. The presence of a solid white line emphasizes the need for drivers to adhere to their designated path, ensuring a smoother flow of traffic and reducing the risk of accidents.