National Highways has released the latest information regarding the closure of a major motorway ahead of a full week of roadworks. 

The M4 is still undergoing major work that has resulted in a series of night closures that will affect drivers this week. 

The planned closures for this week are as follows: 

Monday, September 9

M4-Westbound

M4 westbound Jct 10 exit slip road closure (Slips 1+8) from 9 pm to 6 am. 

M4 westbound Jct 18 exit slip closed from 9 pm to 6 am. 

M4 westbound Jct 20 closed between exit and entry slip roads from 9 pm to 6 am. 

 

M4-Southbound

M4 westbound entry slip from A329m southbound road closure (Slip 6) from 9 pm to 6 am. 

 

M4-Eastbound

M4 eastbound Jct 10 entry slip road closure (Slip 4) from 9 pm to 6 am. 

 

Tuesday, September 10

M4-Westbound

M4 westbound Jct 10 exit slip road closure (Slips 1+8) from 9 pm to 6 am. 

M4 westbound Jct 18 exit slip closed from 9 pm to 6 am. 

M4 westbound Jct 20 closed between exit and entry slip roads from 9 pm to 6 am. 

 

M4-Southbound

M4 westbound entry slip from A329m southbound road closure (Slip 6) from 9 pm to 6 am. 

 

M4-Eastbound

M4 eastbound Jct 10 entry slip road closure (Slip 4) from 9 pm to 6 am. 

 

Wednesday, September 11

M4-Westbound

M4 westbound Jct 10 exit slip road closure (Slips 1+8) from 9 pm to 6 am. 

M4 westbound Jct 18 exit slip closed from 9 pm to 6 am. 

M4 westbound Jct 20 closed between exit and entry slip roads from 9 pm to 6 am. 

 

M4-Southbound

M4 westbound entry slip from A329m southbound road closure (Slip 6) from 9 pm to 6 am. 

 

M4-Eastbound

M4 eastbound Jct 10 entry slip road closure (Slip 4) from 9 pm to 6 am. 

 

Thursday, September 12. 

M4-Westbound

M4 westbound Jct 10 exit slip road closure (Slips 1+8) from 9 pm to 6 am. 

M4 westbound Jct 10 entry slip road closure (Slip 2) 9 pm to 6 am. 

M4 westbound Jct 18 to 19 - carriageway closure from 9 pm to 6 am. 

 

M4-Northbound

M4 eastbound Jct 10 entry slip from A329m northbound road closure (Slip 5) from 9 pm to 6 am. 

 

M4-Southbound

M4 westbound entry slip from A329m southbound road closure (Slip 6) from 9 pm to 6 am. 

 

M4-Eastbound

M4 eastbound Jct 10 entry slip road closure (Slip 4) from 9 pm to 6 am.

M4 eastbound Jct 10 exit slip road closure (Slips 3+7) from 9 pm to 6 am.

M4 eastbound Jct 19 to 18 - carriageway closure from 9 pm to 6 am.