Sirois Transport had several trucks in Halifax today to load out O-rings at the Haltern container terminal. These rings are used in framing windmills and arrive in Halifax by ships. They are then trucked to New Brunswick and Quebec for fabrication.
A least two of the trucks were Freightliner Cascadias with the low rise sleeper option. The aerodynamics of high rise sleepers are are suited to vans and container trailers, but for flat decks, they are not as useful. Hence the low rise option.
This particular rig has the B-train configuration to spread the weight over more axles than a single trailer would.