Two lanes are closed southbound, leaving just one lane open during morning rush hour after a crash between junctions 5 (Bolton) and 4 (Walkden).
It is causing long delays of around and congestion on approach with traffic queued for three miles back to junction 6 at Horwich.
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The crash has resulted in a ‘significant’ hydraulic fluid spillage which will need resurfacing before the carriageway can be reopened.


National Highways say there are delays of around 50 minutes.
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Drivers are being advised to allow extra journey time this morning or avoid the area.