Tesla and Rivian are encroaching on Ford's stomping grounds — the American pickup truck market. The F-150 has been the best-selling truck in the US since 1977 and the best-selling vehicle since 1986, and Ford isn't about to let those records go. While the all-electric F-150 is still a ways away, Ford gave a serious preview of what the production version might be capable of, using a prototype to haul 42 2019 F-150's in 10 double-decker rail cars with a total weight over 1 million pounds. Elon Musk has made some bold claims about the upcoming Tesla pickup, and Rivian looks to build a truck more focused on utility than outright power. But Ford made a strong case that it's sticking with one of the most successful formulas in the history of the automobile.