They show you how they steer, but how does it turn? (Which I should've wrote in the first place! ) It only has one track and tiny side wheels or skies....do they all lean left/right together?
It's simple Newtonian physics. If you want to turn left, fire the portside gun, the reverse to go right. A tad wasteful on the battlefield, but really nasty in the motor pool.
Douglas Self has pages devoted to monowheels (Motorwheels monowheels), which may be one of the least useful paths in transportation technology. "How Stuff Works" (How Monowheels Work) claims that they're steered by weight shift.
I kind of dislike the idea of steering by machine gun (or cannon) fire. It would make my commute even less pleasant.