What does it indicate if an edge line angles in toward the center of the road?

If an edge line angles in toward the center of the road, it typically indicates a change in the road alignment, such as a curve or a narrowing of the roadway. This design helps to guide drivers and enhances safety by making them aware of the upcoming shift in the road's geometry. It also serves to prevent vehicles from drifting too far off the road, promoting better lane discipline.