First Double-Stack Train Debuts
As Union Pacific’s intermodal business grew, so did the need for trains that could carry more loads in less space. Following a pioneering development on the SP, the railroad collaborated with shippers and a rail car manufacturer to introduce a new type of transport: a lightweight car strong enough to handle double-stack loads. In March 1984, UP started its new double-stack service from Los Angeles to Chicago. The 20-car high-speed train could carry 200 shipping containers — twice the number of a conventional container train.