Gyroscopic monorails are a very well explored concepts, you can read more about their rich history through a very interesting article found on http://www.catskillarchive.com/rrextra/odgyro.Html where you can also find information on how does such technology work.
Other concepts similar to Brennan's were of course developed too, wikipedia or other sources can present sufficient information on them.
I've also found some great videos of models on youtube, for example http://www.youtube.com/watch?v=Zvs9KH3UIGM and more from the user AkubiLR who has probably the best scaled examples that I've seen.
The aim of my project was to design an interior gyroscopic vehicle for large factories, capable of carrying six people sitting + 8 standing or a cargo.
Since it's a monorail, friction is lowered, thus lowering the energy consumption considerably. The vehicle is driven by a single driver, much like as in every other rail vehicle.
Covering of lights and other solitaire elements is done in a more aesthetic, say sculptural fashion, it is both as of respect for designing intentions of Makovsky's school of design and also my example of a decent sculptural aesthetics brought into industrial design.
Lights are made in an oval or circle fashion, I believe that this is better than rectangular lights, which can seem to bo too "sharp", especially in an industrial enviroment, that needs humanizing factors so greatly.