B-double Road train
a b-double @ truck stop
a b-double (b-train) consists of prime mover towing specialised lead trailer has fifth-wheel mounted on rear towing semi-trailer, resulting in 2 articulation points. around container ports in australia there may have known super b-double, i.e. b-double quad axle lead trailer capable of holding 1 40-foot shipping container or 2 20-foot shipping containers, , rear trailer being capable of same either tri or quad rear axle set. however, because of length , low accessibility narrow streets, these vehicles restricted in can go , used terminal-to-terminal work, i.e. wharf container holding park or wharf-to-wharf. rear axle on each trailer can pivot while turning prevent scrubbing out edges of tyres due heavy loads placed on them.
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