articulated

Constructed with one or more pivoted joints which allow bending of an otherwise rigid structure.

Of a vehicle, composed of component parts each with its own wheels and chassis, e.g. an articulated lorry, articulated bus, or certain kinds of streetcars and trains.

The trains are a fixed formation of four articulated vehicles, and are fitted with large vestibules, wide aisles, open gangways and air-conditioning.

Qualified by an article

An articulated vehicle, such as a locomotive.

The leading engine was one of the Class Y6 2-8-8-2 compound articulateds, [...] The stack noise of one of these great brutes slogging up a grade was quite unforgettable.