Big problems require big solutions. China expects some 20 million new drivers on the road each year and with them comes more CO2 emissions and air pollution. A Beijing-based transit company is planning to test an innovative solution this summer: A straddling bus. The bus, which can carry up to 1,400 passengers, hovers above the road, letting smaller vehicles pass underneath. Because it operates on existing roadways, the system is much cheaper to build than underground subways, while carrying the same number of people.