wayside(n = noun.artifact) roadside - edge of a way or road or path; "flowers along the wayside"
is a kind of edge
is a part of way
The side of the way; the edge or border of a road or path. [1913 Webster]
Of or pertaining to the wayside; as, wayside flowers. Longfellow. [1913 Webster]
wayside, n.
1 the side or margin of a road.
2 the land at the side of a road.
Idiom:
fall by the wayside fail to continue in an endeavour or undertaking (after Luke 8:5).