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Drivers suffered delays after two cars and a lorry collided.
Two lanes out of three were closed on the M20 Westbound at junction 5 A20 at Aylesford, but have now re-opened.
Traffic is queuing up to junction 7 at Maidstone and Detling and the A249.
A Kent Police spokesman confirmed they were called just before 4.30pm to the M20 between junctions 5 and 4.
Sotuh East Coast Ambulance Service (SECAmb) and a Kent County Council (KCC) Highways team are also at the scene.
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