The carrier's name -- Silk Road – is taken from the ancient Eurasian trade routes. It specializes in delivering transit equipment and has trailers set up to handle trolleys like this.
WisDOT Ponders Using I-94 Shoulders for Autonomous Trucks
Should freeway shoulders be set aside to run autonomous trucks? Wisconsin’s Department of Transportation is considering doing exactly that along a portion of Interstate 94 to support the carrying of machinery to a new factory south of Milwaukee. Tom Berg has more in the Trailer Talk blog. (Because autonomous trucks do pull trailers...)