UPDATE: 9.10am 

There is very slow traffic on the A48 Eastern Avenue westbound in St Mellons between the A48(M) junction 29a and the exit for Pontprennau. 

UPDATE: 8.39am

Delays are possible on the M4 westbound from junction 24 at the Coldra to junction 28 at Tredegar Park because of further congestion.

UPDATE: 8.24am

There is congestion on the M4 eastbound between junction 29 at Castleton and junction 26 in Malpas. Delays are possible. 

UPDATE: 8.12am

Other slow traffic is reported on A467 Forge Road southbound before Tredegar Park in Newport. 

UPDATE: 8.02am

Heavy traffic is reported on the A467 southbound in Rogerstone between B4591 Chartist Drive junction and the A468 Forge Road junction.

7.54am

Slow traffic is reported on the M4 eastbound between junction 27 and junction 26.