Tóchars, as they are known in Irish, were constructed by laying timbers, brushwood, or other materials across the soft, waterlogged ground of Irish wetlands, and they represent some of the oldest engineered roads in the world. This particular example is classed as a class 3 togher, a designation that refers to its method of construction and the materials used, placing it within a broader typology of these prehistoric and early medieval bog roads found across the Irish midlands.

The trackway at Annaghbeg was recorded during a field survey in 1988 and runs on a northeast to southwest orientation, a detail that hints at the practical logic behind its original purpose, connecting two points across the bog along the most direct or most stable route available. The site was documented by the Irish Archaeological Wetland Unit at University College Dublin, as part of a broader effort to catalogue the remarkable number of such features preserved beneath Ireland's peatlands. It appears in the work of Barry Raftery, whose 1990 publication on Irish bog roads remains a key reference for understanding this category of monument. The preservation of organic material in bogland is unusually good, which is part of why tóchars survive at all, the peat acting as a kind of slow, airless archive for wood and other materials that would long since have rotted away in drier ground.