For individual passengers and within this system, there's the need for small, electric aircraft that can take off and land vertically, which are called Vertical Take-Off and Landing (VTOL) aircraft. VTOL aircraft will eliminate the millions of hours that are wasted on roads worldwide due to traffic and congestion. DEEP AERO envisions a network of self-flying autonomous drones, or passenger ferries, that are big enough to ferry individual passengers. This will shrink commute times from hours to minutes. The end result is that urban air transportation will use three-dimensional air space to reduce transportation congestion on the ground, just as skyscrapers allow cities to use limited land more efficiently.