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Delays are clearing after fuel and debris were strewn across the carriageway of the M2 near Strood after an earlier crash.
Two lanes were earlier blocked near Junction 1 for the A289 Rochester and Strood turn-off, with queues backing up all the way back to Junction 3, the A229 the Blue Bell Hill turn-off at Chatham.
Delays are now said to be easing up.
The crash happened shortly before 5am and involved two cars on the London-bound carriageway and two lanes, four and five were still blocked at about 7am near to where the M2 joins lanes one and two of the A2.
Delays have also built up on the A228 south-bound at M20 J4 for Leybourne, as drivers avoid the accident site, which is not helped by roadworks in the area.
A spokesman for Kent Police said: "At 4.55am on Wednesday Kent Police was called to the M2 London-bound, near junction 1, after receiving a report that a vehicle was obstructing the carriageway.
"Shortly after this initial report, a two vehicle collision was reported to have taken place.
"The South East Coast Ambulance Service also attended the scene.
"No serious injuries have been reported however one person has been taken to a local hospital."