Features: * Yesterday's Train of the Future With passenger traffic declining in the mid-1950s due to the rapid expansion of the Interstate Highway system, railroads were looking for ways to attract more ridership. New $184.78 (16% off). Many, including the Pennsy, NYC, UP and others hoped the AeroTrain would do just that. Sets include the engine, two coaches and an observation car. Add-on three-coach sets (sold separately) allow you to re-create the original 10-car consist by combining the four-car introductory set with two add-on three-car sets. AeroTrain Sets. * GM Demonstrator (223-8761). * PRR Pennsy AeroTrain 1956 (223-8762). * NYC Great Lakes AeroTrain 1956 (223-8763). * UP City of Las Veg