Which of these transportation retail innovations was launched with great fanfare but ultimately failed within 18 months due to poor customer adoption?

The transportation industry has seen numerous innovative retail concepts and product launches over the years - some that transformed the industry and others that crashed spectacularly. This trivia question examines a famous retail failure that many transportation enthusiasts might remember, but casual observers may have forgotten. Test your knowledge of transportation retail history!

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Saturn's no-haggle, fixed-price dealership model (1990s)
Carvana's car vending machines (2015)
AutoNation Express digital storefront kiosks (2014)
Tesla's direct-to-consumer sales model (2012)