DCHP-1 Online
plank road Hist. 
a road made of rough-hewn planks laid across timbers running end-to-end at right angles to the planks.
See also: planked road plankway timber road (def. 1)
- 1839 On Wednesday we had the pleasure of a five or six continous miles on a Plank road, leading from Toronto to Kingston, which we understand is to be carried on as far as the Rouge.
- 1848 Planks roads, it is said, were first made in Russia; and their first trial in America was in Canada, where they were made by Lord Sydenham, who from a long residence in Russia, had become well acquainted with them.
- 1905 A plank road ran between Trenton and Belleville, a distance of twelve miles.
- 1965 And in the Queen Charlotte Islands there is nothing left of a 14-mile plank road built more than 40 years ago.
- 1839 On Wednesday we had the pleasure of a five or six continous miles on a Plank road, leading from Toronto to Kingston, which we understand is to be carried on as far as the Rouge.