B-train
n.— «According to the police summary of facts, at 6.57pm on October 8 Harrison was driving a fully laden truck and two articulated trailers—commonly known as a B-train—and was travelling west on SH29, Tauriko, towards the Kaimai Range.» —“Killer milk tanker was speeding, court told” Bay of Plenty Times (Tauranga, New Zealand) June 25, 2007. (source: Double-Tongued Dictionary)