Vehicles run on the east 3rd Ring Road in Beijing, on July 20, 2008. The Chinese capital began on Sunday a two-month-long control of vehicle use to ease traffic pressure and improve air quality for the Olympic Games, set to open in 19 days. From July 20 through Sept. 20, vehicles with even and odd plate numbers run on alternate days in the metropolis, which boasts 3.29 million vehicles.(Xinhua Photo)