BEIJING - JULY 20: The Olympic Lanes are cleared of cars without permits on the busy Second Ring Road July 20, 2008 in Beijing, China. From July 20 to September 20, besides setting up the Olympic Lanes, Beijing will enforce a traffic ban based on whether license plate numbers end in even or odd numerals, to keep vehicles off the roads on alternate days in a bid to ease congestion and improve air quality for next month's Olympic Games. (Photo by Andrew Wong/Getty Images)