The A2 was closed in both directions after a major accident near Dartford Heath earlier this morning.
The crash happened at around 9.20am near the junction with Old Bexley Lane.
A 30-year-old man has been taken to Queen Elizabeth Hospital in Woolwich with leg, chest and abdominal pains.
Kent-bound traffic has now been released after congestion was all the way back to the Black Prince Interchange.
- Six south-east London stations to have NO London Bridge trains until 2018
- UPDATED TRAFFIC WARNING: Drivers STILL queuing on approach to Dartford Crossing 10 hours after crash
- Woman suffers head injury after being hit by car in Orpington
- TfL seek damages after Blackwall Tunnel diesel spill
- Eight men charged with drug offences after raids in Thamesmead