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A lorry crash on the M2 resulted in four-mile rush-hour tailbacks.
The motorway heading towards London was partially blocked because of the incident before junction 4 for Hoath Way, Gillingham.
There was congestion up to junction 5 for Sittingbourne and the Stockbury Roundabout.
One lane out of two were closed and traffic officers were in attendance at around 8.30am.
All lanes have since reopened.
National Highways said there were delays of around 30 minutes and normal traffic conditions were expected by 10.30am.
It is not thought anyone was hurt.