The Military Way
The Military Way was the Roman supply road that ran along a frontier wall behind the line itself, linking the forts, milecastles and turrets along its length. Two Roman walls in Britain had one: a longer route behind Hadrian's Wall in Cumbria and Northumberland with a shorter twin behind the Antonine Wall across the central belt of Scotland. The road stayed in use through the centuries of Roman occupation in the north. It is still walkable in many places as a slightly raised line of grass and stone: an unspectacular thing on its own but the backbone of the most remote frontier the empire ever held.
Am I on it?