For three miles, the craggy outcrops mark the edge of the wet peaty moors.

These old sections have a single, paved lane, concrete curbs to mark the edge of the lane, and gravel shoulders for passing.

These points usually mark an edge or a boundary.

I get in and shuffle over the bump that marks the edge of my territory.

From next year luminous turquoise lines will mark the edges of tarmac and divide cycle lanes from the main carriageway.