What does a white line indicate at the edge of the road?

A white line at the edge of the road indicates the boundary of the roadway. This line serves as a guide for drivers, helping them understand the limits of the road and stay within the designated travel area. It is an important visual cue that enhances safety by clearly defining where the pavement ends and what area may be considered as shoulder or unpaved ground. Understanding this line is crucial, as it helps prevent unintended excursions off the roadway, which could lead to accidents or hazards.