yes its possible . but do you really want to ? they are ok going slow . but if you get into a speed wobble , your toast . they arent manuverable enough to be safe in traffic . please please please don,t ever drive one of those in traffic , somebody will end up dead
watch this vid , the guy is lucky he didn,t end up with 4 broken limbs
YouTube - McLean V-8 Monowheel (Crash)