timber trackway
Historic roads (or historic trails in the US and Canada) are paths or routes that have historical importance due to their use over a period of time. Examples exist from prehistoric times until the early 20th century. They include ancient track ...
made by placing logs, perpendicular to the direction of the road over a low or swampy area. The result is an improvement over impassable mud or dirt roads, yet rough in the best of conditions and a hazard to horses due to shifting loose logs.
Corduroy roads can also be built as a foundation for other surfacing. If the logs are buried in wet, acidic, anaerobic soils such as
peat
Peat is an accumulation of partially Decomposition, decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, Moorland, moors, or muskegs. ''Sphagnum'' moss, also called peat moss, is one of the most ...
or
muskeg
Muskeg (; ; , lit. ''moss bog'') is a peat-forming ecosystem found in several northern climates, most commonly in Arctic and boreal ecosystem, boreal areas. Muskeg is approximately synonymous with bogland, bog or peatland, and is a standard te ...
, they decay very slowly. A few corduroy road foundations that date back to the early 20th century still exist in North America. One example is the