which line is used to mark the right edge of a road

The line used to mark the right edge of a road is a solid white line. This solid white edge line serves as a visual guide to delineate the edge of the travel lane and helps drivers stay within the lane, reducing the chance of drifting off the road. It is specifically used on the right edge for undivided roads and is commonly found on freeways, expressways, and rural arterials with wider traveled ways. In contrast, a solid yellow line is used to mark the left edge of the roadway, usually on divided highways or one-way streets. This distinction helps drivers recognize the edges of the roadway and maintains lane discipline. Thus, the solid white edge line marks the right edge of the road, providing a clear boundary for motorists.