The M4 motorway remains closed eastbound between junction 24 and 28 as work continues to clear the crash site.
Two westbound lanes have now re-opened.
Gwent Police says work is ongoing to fully reopen the motorway as soon as possible.
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Low cloud will bring murky conditions with extensive hill fog.
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Dan Biggar has no doubt that Wales remain flrmly in the Six Nations title mix ahead of next Saturday's clash against Scotland.