B-Train

A road train, also known as a land train or long combination vehicle (LCV), is a semi-trailer truck used to move road freight more efficiently than single-trailer semi-trailers. It consists of two semi-trailers or more connected together with or without a prime mover. It typically has to be at least two trailers and one prime mover. Road trains are often used in areas where other forms of heavy transport (freight train, cargo aircraft, container ship) are not feasible or practical.