Which line is used to mark the right edge of a road?

The solid white line is used to mark the right edge of a road. This line serves as a visual aid for drivers to stay within their lane and helps to delineate the boundary of the roadway. It indicates that crossing the line may not be safe or permitted, guiding drivers on where it is acceptable to drive.

In contrast, a dashed white line typically indicates areas where lane changes are allowed. Solid yellow lines are primarily used on the left side of the road to separate opposing traffic lanes, while dashed yellow lines signal that passing is permitted when safe to do so. Recognizing these line markings is crucial for maintaining proper lane discipline and road safety.