Fadgl is a catchy name, don't you agree? Well, it turns out that the contraption (aka the auto train) was manufactured by the Fageol brothers from California. Someone thought their name was hard to pronounce and that Fadgl would be easier. Really! Perhaps they should have just removed that last pesky vowel and left it as Fdgl.
Anyway, the auto train was not so much a train as a tractor pulling a bunch of open cars. The brothers owned the Flageol Motor Co. in Oakland, CA, where they manufactured tractors, trucks, and automobiles. They made this train for the 1915 Panama-Pacific Exposition in San Francisco, but when the exposition was over, the train was shipped to Chicago to be used in Lincoln Park.
I'm not sure how long the train lasted, but the Flageol Motor Co. ran into financial difficulties in 1930, went into receivership, and was eventually bought from the bank by T.A. Peterman, a logger and plywood manufacturer from Tacoma, WA, who needed logging trucks for his business. That was the beginning of Peterbilt trucks, but that's another story.