There are long delays on the M25 in Essex as the Dartford Crossing QE2 Bridge is closed because of a serious crash.
Highways England traffic officers are working alongside Kent Police to clear the incident which happened just after 4am this morning.
Traffic is being diverted by using a contraflow through the Dartford tunnels.
Although two lanes are open in each direction and a contraflow in operation through the tunnels delays in the area are severe and drivers are being urged by Highways England to check conditions before they set out and plan their journeys to avoid the area if possible.
The crossing is expected to remain closed until Friday afternoon.