Perhaps the most radical hydrogen-powered concepts to come out of the Hyundai Motor Group's Hydrogen Wave forum this week are this Trailer Drone concept and the modular Fuel Cell e-Bogie concept that it sits upon. Together, these vehicles imagine that zero-emissions hydrogen fuel cells and autonomous driving tech will combine to change the way we think of trucking and logistics -- and it all starts with ditching most of the truck itself.

The e-Bogie takes its name and inspiration from bogies, the two-axle subframes that a train car rides atop at either end. More "shipping robot" than truck, the e-Bogie is essentially an autonomous electric chassis powered by a hydrogen fuel cell. The e-Bogie can pull off impressive maneuvers like turning in place and diagonal "crab walk" driving thanks to its four-wheel independent steering. Its beefy, low-profile design allows it to carry a small shipping container or other load.