It is a togher, a term used in Irish archaeology for a wooden trackway built across soft or flooded ground, and this particular example falls into what archaeologists classify as a class 3 togher, a category that typically refers to less formally constructed paths, often made from brushwood, branches, or loosely laid timbers rather than the more elaborate plank-and-peg engineering seen in higher-class examples. The bogland that swallowed it also saved it, the anaerobic conditions of a wet bog being among the most effective natural preservatives known.

The site was noted during a field survey in 1988, attributed to the fieldwork of B. Raftery, one of Ireland's foremost authorities on bog roads and prehistoric timber construction. Raftery's broader work across Irish wetlands helped establish that these trackways were not isolated curiosities but part of a widespread and deliberate effort by early communities to move people, animals, and goods across terrain that would otherwise have been impassable. The data was later compiled as part of the work of the Irish Archaeological Wetland Unit, based at University College Dublin, a research body that systematically catalogued bogland archaeology across the midlands and west of Ireland before much of it could be lost to turf-cutting and drainage. Longford's midland bogs formed a significant part of that survey landscape, and Derrynaskea sits within a region where wetland archaeology has repeatedly surfaced evidence of organised movement and settlement going back thousands of years.