It's common for television shows to create characters out of the inanimate. Like a town or a place of business, modes of transport can take on their own personality. In the case of Arrested Development, the Stair Car is as recognizable as Fonzie's motorcycle or Walter White's Aztek.
One can't help but wonder at the tales of a man who once wandered the halls of MIT pondering circuit design, only to now claim personal responsibility for converting the orchards of Silicon Valley into parking lots.
Sorry, Segway, but I'm not smitten with your human transporters. I can't think of anything more harrowing than trying to navigate Rome's narrow, cobblestone streets while aboard the Ultimate Green Machine.