When you're driving on busy city streets, there's nothing more frustrating than being stuck behind a huge gas-guzzling bus. Over in China, Shenzhen Huashi Future Parking Equipment company has come up with a solution. Instead of spending millions to widen roads, they developed a "3D Express Coach" that will allow cars less than 6.6 feet (2 meters) high to travel underneath. Shenzhen Hashi predicts that each of the vehicles' cabs will carry 1200-1400 passengers at a time, and will reduce traffic by up to 30% on crowded roads. When completed, the straddling buses will run on "relay charges" of electricity and solar power. The road-straddling buses will use only 860 tons of fuel per year, which could reduce yearly carbon emissions by 2,640 tons. Construction of the first 115 miles of track will begin in Beijing's Mentougou district at the end of 2010.