The on-road, straddling subway

TreeHugger: "What if there was a way to get most of the benefits of a subway, but without the costs of digging up all those tunnels? The Chinese company Shenzhen Hashi Future Parking Equipment Co. thinks it might be able to do just that with a concept it calls the 3D Fast Bus (which has also been called the straddling bus), and kind of giant bus/train that straddles the street and allows cars to drive right under it."