Location: northbound between junctions J22 (Burnham on Sea) and J21 (Weston super Mare) .
Lane Closures : Lane three will be closed.
Due to: Emergency barrier repairs are planned.
Status : Pending.
Schedule : From 20:00 on 17 March 2026 to 04:00 on 18 March 2026.
Lanes Closed : There will be one of three lanes closed.
Nearest town: 19.45 miles from Gabalfa.

Location: southbound between junctions J21 (Weston super Mare) and J22 (Burnham on Sea) .
Lane Closures : Lane three will be closed.
Due to: Emergency barrier repairs are planned.
Status : Pending.
Schedule : From 20:00 on 17 March 2026 to 04:00 on 18 March 2026.
Lanes Closed : There will be one of three lanes closed.
Nearest town: 19.1 miles from Gabalfa.

Location: northbound between junctions J20 (Nailsea) and J19 (Portishead) .
Due to: Roadworks scheme.
Period : from 20:09 on 16 March 2026 to 06:00 on 21 March 2026.
Nearest town: 17.37 miles from Gabalfa.

Location: northbound at junction J20 (Nailsea) .
Lane Closures : Lane one will be closed.
Due to: Emergency roadside drains works are planned.
Status : Pending.
Schedule : Expect disruption everyday between 20:00 and 04:00 from 17 March 2026 to 28 March 2026.
Schedule : From 20:00 on 28 March 2026 to 04:00 on 29 March 2026.
Schedule : Expect disruption everyday between 20:00 and 04:00 from 29 March 2026 to 1 April 2026.
Lanes Closed : There will be one of three lanes closed.
Nearest town: 16.61 miles from Gabalfa.

Location: northbound entry slip at junction J20 (Nailsea) .
Lane Closures : Lane one will be closed.
Due to: Road repairs are planned.
Status : Pending.
Schedule : From 21:00 on 23 March 2026 to 06:00 on 24 March 2026.
Lanes Closed : All lanes will be closed.
Nearest town: 16.59 miles from Gabalfa.

Location: northbound between junctions J21 (Weston super Mare) and J20 (Nailsea) .
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Road repairs are planned.
Status : Pending.
Schedule : From 21:00 on 23 March 2026 to 06:00 on 24 March 2026.
Lanes Closed : There will be two of three lanes closed.
Nearest town: 16.47 miles from Gabalfa.

Location: northbound between junctions J20 (Nailsea) and J19 (Portishead) .
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Road repairs are planned.
Status : Pending.
Schedule : From 21:00 on 23 March 2026 to 06:00 on 24 March 2026.
Lanes Closed : There will be two of four lanes closed.
Nearest town: 16.71 miles from Gabalfa.

Location: southbound between junctions J20 (Nailsea) and J21 (Weston super Mare) .
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 23 March 2026 to 28 March 2026.
Lanes Closed : There will be two of three lanes closed.
Nearest town: 16.59 miles from Gabalfa.

Location: northbound between junctions J20 (Nailsea) and J19 (Portishead) .
Lane Closures : Lanes 2 and 3 will be closed.
Due to: Roadside drains works are planned.
Status : Pending.
Schedule : Expect disruption everyday between 21:00 and 05:00 from 17 March 2026 to 20 March 2026.
Lanes Closed : There will be two of three lanes closed.
Nearest town: 18.42 miles from Gabalfa.

Location: northbound between junctions J20 (Nailsea) and J19 (Portishead) .
Lane Closures : Lanes 2 and 3 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 17 March 2026 to 21 March 2026.
Lanes Closed : There will be two of three lanes closed.
Nearest town: 17.79 miles from Gabalfa.

Location: northbound between junctions J20 (Nailsea) and J19 (Portishead) .
Lane Closures : Lanes 2, 3 and 4 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 17 March 2026 to 21 March 2026.
Lanes Closed : There will be three of four lanes closed.
Nearest town: 17.36 miles from Gabalfa.

Location: northbound between junctions J21 (Weston super Mare) and J20 (Nailsea) .
Due to: Roadworks scheme is planned.
Status : Pending.
Schedule : From 21:00 on 20 March 2026 to 06:00 on 21 March 2026.
Nearest town: 16.63 miles from Gabalfa.

Location: northbound between junctions J21 (Weston super Mare) and J20 (Nailsea) .
Lane Closures : Lanes 1 and 2 will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 21:00 on 20 March 2026 to 06:00 on 21 March 2026.
Lanes Closed : There will be two of three lanes closed.
Nearest town: 16.63 miles from Gabalfa.

Location: northbound entry slip at junction J21 (Weston super Mare) .
Due to: Roadworks are planned.
Status : Pending.
Schedule : From 22:00 on 20 March 2026 to 06:00 on 21 March 2026.
Lanes Closed : All lanes will be closed.
Nearest town: 16.55 miles from Gabalfa.

Location: northbound between junctions J21 (Weston super Mare) and J20 (Nailsea) .
Lane Closures : The hard shoulder, lanes 1 and 2 are closed.
Due to: Roadworks.
Period : expect disruption until 06:00 on 17 March 2026.
Lanes Closed : There are two of three lanes closed.
Nearest town: 16.69 miles from Gabalfa.

Location: southbound between junctions J19 (Portishead) and J20 (Nailsea) .
Lane Closures : The hard shoulder is closed.
Due to: Roadworks.
Period : expect disruption until 17:00 on 20 March 2026.
Nearest town: 18.75 miles from Gabalfa.

Location: northbound between junctions J20 (Nailsea) and J19 (Portishead) .
Due to: Barrier repairs are planned.
Status : Pending.
Schedule : Expect disruption everyday between 08:00 and 17:00 from 17 March 2026 to 20 March 2026.
Nearest town: 18.67 miles from Gabalfa.

Location: southbound between junctions J19 (Portishead) and J20 (Nailsea) .
Lane Closures : Lane one will be closed.
Due to: Roadworks are planned.
Status : Pending.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 17 March 2026 to 21 March 2026.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 23 March 2026 to 28 March 2026.
Schedule : Expect disruption everyday between 20:00 and 06:00 from 30 March 2026 to 1 April 2026.
Lanes Closed : There will be one of three lanes closed.
Nearest town: 18.88 miles from Gabalfa.
