Traffic is queueing and the carriageway is blocked because of a vehicle fire on the M4 Eastbound J46 (Llangyfelach) and J45 (Ynysforgan)
There's congestion to J47 (Penllergaer/Swansea West Services).
Wales captain Sam Warburton has lavished praise on "diligent professional" Dan Biggar following the fly-half's rapid recovery from injury.
Biggar will face RBS 6 Nations opponents Scotland on Saturday, less than a week after he limped off against Ireland in Dublin with a sprained ankle that Wales initially feared could have meant he would spend up to five weeks on the sidelines.
But Biggar trained fully yesterday.
You have got to give him a lot of credit for the way he has worked.
If an average person just sat back and didn't really do anything, you would be probably be out for three weeks, but because he is such a diligent professional, he has managed to get back so soon.
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