The General Motors Train of Tomorrow was a traveling display of future possibilities in railroad passenger accommodations; nearly six million people went through it during its 28-month tour. The four-car train of "Astra Domes," built by Pullman Standard in 1947, included a chair car, a sleeper, a dining car and an observation-lounge. Power was an EMD 2000-horsepower E7A unit. After the Fair the entire set was sold to the Union Pacific, which renumbered the diesel unit to 988; it was removed from the roster in 1963. At left is a New York Central class S-1 4-8-4, number unknown.