On the morning of 5 September 2013, more than 130 vehicles were involved in a series of shunt crashes on the southbound carriageway of the crossing which at the time was covered in heavy fog. Emergency services were called to the crossing at around 07:15 BST according to Kent Police and the bridge was subsequently closed for nine hours. Inappropriate driving in conditions of very poor visibility was suggested as the cause. There were eight serious injuries and 60 minor injuries, but no life-threatening injuries or deaths.