A model of the China-built Transit Explore Bus (TEB) is unveiled at the 19th Beijing International High-Tech Expo on May 19. The TEB's legs allow its giant two-story frame to glide above gridlock at up to 60 kilometers per hour, allowing vehicles of less than two meters to drive freely underneath the bus, even when it is stationary. The vehicle can carry up to 1,400 commuters and could be produced for 20 percent of the price of an underground train. Photo: CFP