#A282 southbound, #Dartford bridge, between J31 of the #M25 and #A296. Traffic was held due to a collision. 2 lanes are now open. There is approximately 3 miles of congestion on the approach. Post navigation Porsche driver travels 30 miles with car rear hanging off after M25 crash All lanes are now open on the #A282 southbound, following an earlier collision near #Dartford bridge. Delays of approximately 30 minutes above normal, now easing – just over 3 miles of congestion on the approach.