An accident on the M56 near Runcorn is causing severe disruption along the eastbound stretch of the motorway as far as back as junction 15 for the M53.
One lane has been closed and traffic is building in the area.
Highways England say motorists are facing delays of around 30 minutes against expected traffic.
The M56 was hit by heavy traffic this morning, as festival-goers travelled from Daresbury after Creamfields.
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