turnpike double
n.— «Shippers need a choice to get to markets, especially with time-sensitive cargo. One suggestion is changing provincial regulations to allow trucks to haul two 53-foot trailers, known in Canada as a Turnpike Double. New Brunswick has had a pilot project on this configuration.» —“Port bobs along as seas shift” by Tom Peters Chronicle Herald (Halifax, Nova Scotia, Canada) Mar. 1, 2008. (source: Double-Tongued Dictionary)