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.
- TRAVEL: Engineering work disrupting trains this weekend
- Woolly Hat Day 2017: We want photos of you in your favourite cosy headgear
- False funding claim revealed in New Bermondsey sports development
- Increasing social care cost puts strain on Bexley council as councillors prepare to debate upcoming budget
- REVEALED: Which companies do you think are keeping their customers most satisfied?