What does a solid white line along the side of the roadway indicate?

A solid white line along the side of the roadway indicates where the other edge of the road is located. This marking helps drivers understand the boundaries of the roadway, particularly in situations where the road may not have a clear shoulder or where there is a risk of running off the pavement. It serves as a visual guide that delineates the edge, ensuring that drivers remain aware of their position relative to the road's limits.

While parking regulations may also be enforced in certain areas alongside solid white lines, the primary purpose is to demarcate the roadway's edge rather than specifically indicating parking restrictions or lane divisions. This clear delineation is crucial for safety, especially in low visibility conditions or on roads without curbs where the edge might not be otherwise obvious.