These kinds of compromises are necessary for a vehicle like the Transition, as rules governing aircraft and highway vehicles are often incompatible when applied to the same vehicle. Such regulatory hurdles and other production headaches have delayed the Transition a few times already. Last year Terrafugia said we'd see the vehicle delivered by 2011. That's now been pushed back another year, but clearing this major regulatory obstacle (the FAA already approved the Transition last year) should help the Transition down the homestretch.