Traffic police set up road barriers on the entrance area to the express way linking Shenyang to the Taoxian airport on December 26, preventing cars from entering. Heavy fog covers some areas of Liaoning province on Tuesday, December 25, 2007. The visibility in some area is less than 50 meters. Six highways linking Shenyang with nearby cities were closed due to safety concerns.

 Heavy fog blankets street in Dalian on December 26,2007, making the traffic more difficult.
       

  
Heavy fog blankets streets on December 26,2007, making the traffic more difficult.