Delays caused by two separate pile-ups on the A2 have now cleared.
The crashes on the coast-bound side caused travel misery for drivers heading towards Bluewater this afternoon.
The first multi-vehicle accident happened near the Bean interchange at 1.20pm, followed by another one about half an hour later near the Ebbsfleet turn-off.
At one point, congestion stretched back as far as Orpington.
A police spokesman said of the first crash: "Police were called to the A2 at Bean at 1.20pm today following a report that a multi-car collision had occurred.
"Officers along with Kent Fire & Rescue Service and South East Coast Ambulance Service were in attendance.
"A man was taken to Kings Hospital following the collision."
The road was clear by 3.30pm.