There are 17 closures along the M4 expected next weekRoad closures and M4 disruption in Wales this week(Image: PAUL GILLIS / Reach PLC)

There are road closures planned on major roads across Wales this week – from September 29 to October 5 – with 17 closures expected. We’ve put together a list of all the road closures and disruption on the M4 you should be aware of for the coming week.

While many are expected to only be closed for one night, the M4 eastbound J38 Margam to J37 Pyle will be closed for roadworks from October 4 to November 11 with contraflow and diversions in place.

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  • The M4 westbound will be closed between J37 Pyle to J39 Groes as roadworks take place between 8pm and and 6am from September 26 to September 29. The same road will be closed again from 10pm to 6am from October 3 to October 6.
  • The M4 eastbound from J38 Margam to J39 Groes will be closed for roadworks to take place between 8pm and and 6am from September 26 to September 29.
  • In both directions the M4 J23A Magor will be closed for roadworks to be carried out. The closure will take place between 8pm and and 6am from September 26 to September 29.
  • The on slip road will be closed for clearance and environmental work overnight on the M4 westbound J32 Coryton. The road will be closed from 8pm on Sunday, September 28 to 6am on Monday, September 29.
  • The on slip road and roundabout will be closed on the M4 westbound J33 Capel Llanilltern overnight from 8pm on Wednesday, September 1 to 6am on September 2.
  • The M4 with be closed in both directions on J23A Magor for electrical work from 8pm to 6am from September 26 to 29, then again from October 3 to October 6.
  • The M4 westbound J33 Capel Llanilltern off slip road will be closed whilst environmental work takes place overnight from 8pm to 6am from October 1 to October 3.
  • The M4 westbound J32 Coryton on slip road will be closed for environmental work from 8pm to 6am from September 28 to September 30.
  • The M4 westbound J37 Pyle on slip road will be closed for structural inspections overnight from 8pm to 6am from September 29 to October 4.
  • The on slip road on the M4 westbound J42 Earlswood will be closed for retaining wall works between 8pm to 6am from October 3 to October 6.
  • The off slip road of the M4 westbound J40 Taibach will be closed for electrical work overnight on October 1 from 8pm to 6am.
  • The on slip road will be closed on the M4 westbound J39 Groes from 8pm to 6am between October 3 to October 6.
  • The M4 eastbound J38 Margam to J37 Pyle will be closed for roadworks from October 4 to November 11 with contraflow in place.
  • The M4 eastbound J43 Llandarcy to J42 Earlswood will be closed for retaining wall works between 8pm to 6am from October 3 to October 4.

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