A traffic police maintains traffic order on the "Car Free Day" in Shenyang, Northeast China's Liaoning Province, September 22, 2007. Saturday marks China's first large-scale participation in "Car Free Day" activities. The number of cars on the roads dropped noticeably on the day in most of the 108 participating cities across China. The Chinese characters on the signboard read "No Car Day", except taxis, long-distance buses, shuttle buses and schoolbuses.  [newsphoto]