text: First and Foremost, Vauban, home to 5,500 residents within a rectangular square mile, may be the most advanced experiment in low-car suburban life. Passengers cars are responsible 12 percent of greenhoudse gas emissions in Europe and up to 50 percent in some car-intensive areas in the United States. In the United States the Enviormental Protection Agency is promoting "car reduced" communities. Many experts expect public transport serving suburbs to play a larger part in a new six-year federal transportation bill to be approved this year. In previous bills, 80 percent of appropriations have by law gone to highways and only 20 percent to other transport.