The term 'road border' can be broken down into four distinct crossword solutions: CURB (4 letters), SHOULDER (8 letters), VERGE (5 letters), and wayside (7 letters). A CURB is a raised edge along the side of a road, usually made of concrete or stone, which serves to separate the road from the sidewalk. A SHOULDER is the area of pavement between the edge of the road and the adjacent terrain, which is typically unpaved. A VERGE is a strip of grass or other vegetation that runs along the side of a road, separating it from adjacent land. Finally, a wayside is an area of land adjacent to a road, often with a view of the surrounding landscape. All of these terms refer to the edges of a road, and together they form the road border.