This line of small basalt stones represents the northern curb of latest basalt phase of the Via Gabina, almost certainly the eastward continuation of curb 7020 from the other side of the side street running northward.
Road, curb and drain between Areas G and H
Looking north; 2018 extension of Via Gabina
Sketch of 6056, 6068, 6069, 6070, 7229.