Track Sphere Steering.
Drive-by-wire typically removes the mechanical linkages between the controls of a car and the devices that do the work. For the AirShip, the driver does not operate the track spheres and brakes manually, but electronic controls send commands from a central computer, which instructs the vehicle on what to do. The advantage here is that the computer is able to make the track spheres and hubs, regenerative drive, regenerative braking, and air bearings work as one to give the car better handling. This is especially important with bad road conditions in order to give efficient power consumption and to react to emergencies faster than a human driver.
Track Sphere and Hub with Electromagnetic Coordinates