The Trivio is a 3 wheel design prototype that takes the idea in many directions: comfort, fun, travel and sport each a bit different and modified slightly depending on the specific application. With the current crop of three wheelers coming out, more designers seem to be focusing their attention in that direction and we're sure to see some interesting concepts.
The Trivio has an external bar on each side to protect the riders in case of a crash, something not present in current designs. Rider position varies somewhat, a standard upright position in the comfort and travel versions, more forward in the fun and sport versions. The travel version has hard bags plus a pretty slick tilting canopy that covers the riders for weather protection.
When you look at the designs here, you get the feeling that the 3 wheelers are really a different category of vehicle altogether, not just a modified scooter or motorcycle. The buyers of these trikes may not be from your usual market segments, and like the Can Am Spyder, aiming at folks who might not have any intention of buying a two wheeler but who might try one of these, looking for the fun of a motorcycle but not willing to take what they perceive to be risks or discomforts of various sorts.
These design variations on an Aprilia theme come from Matteo Bertanelli and Andrea Pelotti of Design Innovation in Italy. It isn't clear from the translation whether this is just a design exercise or something beyond that. I do like the looks of this, though, and it is sure to be just the beginning of some of the really cool designs to come.
Another image and links below: