Corduroy roads are roads that are built with logs or poles
placed across swampy or unstable ground. This type of road was used
by wheeled vehicles and horses. Cattle and herds of pigs or sheep
were not allowed on the road because of spaces between the logs and
poles. Sometimes hewed or sawn lumber was used in the corduroy
road. Look up some of the books about the old days written by Eric
Sloane.