Footage has emerged from China of a motorway being shut down due to very heavy smog.<br /><br />The video, filmed in Huaian, Jiangsu Province last Sunday, shows a large number of cars stopped on the road in a thick cloud of pollution.<br /><br />The smog resulted in the closure of several motorways in the area, stranding over 400 vehicles. <br /><br />Traffic only started to resume on the motorway on following morning.
