Strangely enough, there have been cars with ceter steering. The Czech Tatra streamliners of the early-mid 30's, designed by Hans Ledwinka, were initially designed like this. They soon reverted to the typical right-side (for Czechoslovakia, in those days) controls because people couldn't easily open the windows, rest their arms, or even make hand signals. About 10 years ago, Maclaren automobiles of England produced a similar seating arrangement, with the outboard passenger seats both set back a way, to give the driver a better view out the windows. These models are quite rare, since they cost $1/2 million each.