**(Left) Fuel cell and by-wire technology frees engineers to flatten the chassis into an 11-inch- thick pancake of steel and wires. from the rear of the platform, the by-wire brakes (1) are activated by a computer-controlled signal, not hydraulic pressure. the fuel cell stack (2) creates electricity from hydrogen, which releases its excess heat and water vapor via metal fins on the radiator (3). Hydrogen, ostensibly from a refueling station in a town near you, enters through a valve on the side of the vehicle (4) and replenishes three compressed hydrogen tanks (5). A high priority of hydrogen storage research is ensuring these don't leak during a crash. Two types of supports connect the skateboard to the passenger cabin: body mounts (6) provide a strong physical connection, and the universal docking port (7) links cockpit controls to computerized systems on the platform. The by-wire inputs snake through this port on their way to the main by-wire system controls (8), which send commands to the brakes, electric engine (9), and by-wire steering rack (10). Future Hy-wire prototypes may incorporate four smaller engines, one per wheel, as in the autonomy concept.