Traffic Merthyr Dyfan

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Merthyr Dyfan
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Nearby: BarryCardiffWickCaerphillyPontypriddBridgend

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FULL SCREEN UPDATED: 20:28

Current traffic around Merthyr Dyfan

The following traffic incidents and congestion for Merthyr Dyfan have been reported by Highways England, Traffic Scotland, Traffic Wales or Transport for London (TfL) in the last two hours:

J25 CAERLEON TO J25A GROVE PARK

Description: M4WestboundJ25 (Caerleon) Caerleon to J25A (Newport) Grove ParkIncidentDelay: s possible :, Start time: 11/12/2025 17:26 , Expected end time: 11/12/2025 21:26, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 17:26
Nearest town: 18.44 miles from Merthyr Dyfan. CLEARED @ 17:42

NANTGARW

Description: A470NorthboundNantgarwCongestionDelay: s possibleoffslip :, Start time: 11/12/2025 16:54 , Expected end time: 11/12/2025 18:54, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 16:54
Nearest town: 10.32 miles from Merthyr Dyfan. CLEARED @ 17:06

J33 CAPEL LLANILLTERN

Description: M4WestboundJ33 (Cardiff) Capel LlanillternCongestionDelay: s possibleoffslip :, Start time: 11/12/2025 16:57 , Expected end time: 11/12/2025 19:57, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 16:57
Nearest town: 6.59 miles from Merthyr Dyfan. CLEARED @ 17:06

CORYTON TO NANTGARW

Description: A470NorthboundCoryton to NantgarwCongestionDelay: s possible :, Start time: 11/12/2025 17:00 , Expected end time: 11/12/2025 19:00, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 17:00
Nearest town: 9.01 miles from Merthyr Dyfan. CLEARED @ 17:06

A48 INTERCHANGE TO M4 J33 CAPEL LLANILLTERN

Description: A4232NorthboundA48 Interchange to M4 J33 Capel LlanillternCongestionDelay: s possible :, Start time: 11/12/2025 15:31 , Expected end time: 11/12/2025 18:50, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 15:31
Nearest town: 5.27 miles from Merthyr Dyfan. CLEARED @ 15:42

J24 COLDRA TO J26 MALPAS

Description: M4WestboundJ24 (Newport) Coldra to J26 (Newport) MalpasRoadworksClosedDiversions in place12/12/25-13/12/25 2000-0600 :, Start time: 12/12/2025 20:00 , End Date: 13/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 06/12/2025 16:51
Nearest town: 18.61 miles from Merthyr Dyfan. CLEARED @ 17:42

UPPER BOAT

Description: A470SouthboundUpper BoatonslipRoadworksClosed09/12/25-12/12/25 2000-0600 :, Start time: 09/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 09/12/2025 20:00
Nearest town: 11.21 miles from Merthyr Dyfan. CLEARED @ 16:54

GLYNTAFF

Description: A470SouthboundGlyntaffonslipRoadworksClosed08/12/25-12/12/25 2000-0600 :, Start time: 08/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 08/12/2025 20:00
Nearest town: 8.08 miles from Merthyr Dyfan. CLEARED @ 16:54

BROADWAY INTERCHANGE

Description: A470SouthboundBroadway Interchange08/12/25-12/12/25 2000-0600onslipRoadworksClosed :, Start time: 08/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 08/12/2025 20:00
Nearest town: 8.08 miles from Merthyr Dyfan. CLEARED @ 16:54

A4051 INTERCHANGE (CROES-Y-MWYALCH) TO TURNPIKE R/BOUT

Description: A4042NorthboundA4051 Interchange (Croes-y-Mwyalch) to Turnpike R/bout11/12/25-12/12/25 2000-0600ClosedRoadworks :, Start time: 11/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 06/12/2025 14:40
Nearest town: 18.72 miles from Merthyr Dyfan. CLEARED @ 15:42

CWMBRAN TO A4051 INTERCHANGE (CROES-Y-MWYALCH)

Description: A4042SouthboundCwmbran to A4051 Interchange (Croes-y-Mwyalch)08/12/25-12/12/25 2000-0600ClosedDiversions in place :, Start time: 08/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 08/12/2025 20:00
Nearest town: 18.72 miles from Merthyr Dyfan. CLEARED @ 15:42

There are no current incidents in this location.

Roadworks

ROAD WORKS

Location: The M5 southbound between junctions J21 (Weston super Mare) and J22 (Burnham on Sea) .
Lane closures: Lane three will be closed.
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 21:00 on 11 Dec 2025 to 06:00 on 12 Dec 2025.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 18.91 miles from Merthyr Dyfan.

ROAD WORKS

Location: The M5 northbound between junctions J22 (Burnham on Sea) and J21 (Weston super Mare) .
Lane closures: Lane three will be closed.
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 21:00 on 11 Dec 2025 to 06:00 on 12 Dec 2025.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 18.83 miles from Merthyr Dyfan.

ROAD WORKS

Location: The M5 northbound between junctions J22 (Burnham on Sea) and J21 (Weston super Mare) .
Lane closures: The hard shoulder is closed.
Reason: Horticultural works.
Status: Currently Active.
Period: expect disruption until 16:00 on 11 Dec 2025.
Nearest town: 17.68 miles from Merthyr Dyfan. CLEARED @ 16:02

ROAD WORKS

Location: The M5 northbound between junctions J22 (Burnham on Sea) and J20 (Nailsea) .
Lane closures: Lanes 1 and 2 will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: From 21:00 on 12 Dec 2025 to 20:01 on 13 Dec 2025.
Schedule: Expect disruption everyday between 20:00 and 06:00 from 15 Dec 2025 to 19 Dec 2025.
Lanes Closed: There will be two of three lanes closed.
Nearest town: 17.53 miles from Merthyr Dyfan.

ROAD WORKS

Location: The M5 northbound between junctions J22 (Burnham on Sea) and J20 (Nailsea) .
Lane closures: Lane three will be closed.
Reason: Emergency barrier repairs are planned.
Status: Pending.
Schedule: From 20:00 on 14 Dec 2025 to 06:00 on 15 Dec 2025.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 17.21 miles from Merthyr Dyfan.

ROAD WORKS

Location: The M5 northbound between junctions J22 (Burnham on Sea) and J21 (Weston super Mare) .
Lane closures: Lane one will be closed.
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 21:00 on 12 Dec 2025 to 06:00 on 13 Dec 2025.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 18.83 miles from Merthyr Dyfan.

ROAD WORKS

Location: The M5 northbound entry slip at junction J20 (Nailsea) .
Lane closures: Lane one will be closed.
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 20:00 on 12 Dec 2025 to 06:00 on 13 Dec 2025.
Lanes Closed: All lanes will be closed.
Nearest town: 19.1 miles from Merthyr Dyfan.

ROAD WORKS

Location: The M5 southbound between junctions J20 (Nailsea) and J22 (Burnham on Sea) .
Lane closures: The hard shoulder, lanes 1 and 2 are closed.
Reason: Roadworks.
Status: Currently Active.
Period: expect disruption until 06:00 on 12 Dec 2025.
Lanes Closed: There are two of three lanes closed.
Nearest town: 18.21 miles from Merthyr Dyfan.

ROAD WORKS

Location: The M5 northbound at junction J20 (Nailsea) .
Lane closures: The hard shoulder and lane 1 are closed.
Reason: Emergency Roadside Drains works.
Status: Currently Active.
Period: expect disruption until 04:00 on 12 Dec 2025.
Lanes Closed: There is one of three lanes closed.
Nearest town: 19.11 miles from Merthyr Dyfan.

Traffic in Nearby Villages

Colcot (0mi)
Cadoxton (0.62mi)
Barry Dock (0.62mi)
Barri (Barry) (0.62mi)
Barry (Barri) (0.62mi)
Palmerstown (1.24mi)
Burdonshill (1.24mi)
Dyffryn (1.75mi)
St Andrews' Major (1.75mi)
Barry Island (1.86mi)
St Lythans (1.96mi)
Wenvoe (1.96mi)
Westra (2.24mi)
The Knap (2.24mi)
Twyn yr odyn (2.49mi)
Moulton (2.56mi)
Sully (2.56mi)
Wallston (2.56mi)
Porthkerry (2.63mi)
Dinas Powis (2.77mi)
Eastbrook (2.77mi)
Tredogan (2.77mi)
Michaelston le Pit (3.1mi)
Lower Porthkerry (3.1mi)

Merthyr Dyfan

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Elsewhere on the web:

National Highways England

Official source of traffic updates.

Transport for London (TFL)

Transport for London's (TfL) portal for transportation in London.

Traffic Wales

The Welsh government's traffic information service for Wales.

Traffic Scotland

Live traffic conditions and news for Scotland's road network.

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Description: M4 : Westbound : J25 (Caerleon) Caerleon to J25A (Newport) Grove Park : Incident : Delays possible :, Start time: 11/12/2025 17:26 , Expected end time: 11/12/2025 21:26, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 17:26
Nearest town: 18.44 miles from Merthyr Dyfan.

51.6--2.98

Description: A470 : Northbound : Nantgarw : Congestion : Delays possible : offslip :, Start time: 11/12/2025 16:54 , Expected end time: 11/12/2025 18:54, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 16:54
Nearest town: 10.32 miles from Merthyr Dyfan.

51.56--3.27

Description: M4 : Westbound : J33 (Cardiff) Capel Llanilltern : Congestion : Delays possible : offslip :, Start time: 11/12/2025 16:57 , Expected end time: 11/12/2025 19:57, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 16:57
Nearest town: 6.59 miles from Merthyr Dyfan.

51.51--3.31

Description: A470 : Northbound : Coryton to Nantgarw : Congestion : Delays possible :, Start time: 11/12/2025 17:00 , Expected end time: 11/12/2025 19:00, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 17:00
Nearest town: 9.01 miles from Merthyr Dyfan.

51.54--3.26

Description: A4232 : Northbound : A48 Interchange to M4 J33 Capel Llanilltern : Congestion : Delays possible :, Start time: 11/12/2025 15:31 , Expected end time: 11/12/2025 18:50, Severity: Moderate, Source: Welsh Government, Last updated: 11/12/2025 15:31
Nearest town: 5.27 miles from Merthyr Dyfan.

51.49--3.29

Description: M4 : Westbound : J24 (Newport) Coldra to J26 (Newport) Malpas : Roadworks : Closed : Diversions in place : 12/12/25-13/12/25 2000-0600 :, Start time: 12/12/2025 20:00 , End Date: 13/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 06/12/2025 16:51
Nearest town: 18.61 miles from Merthyr Dyfan.

51.6--2.96

Description: A470 : Southbound : Upper Boat : onslip : Roadworks : Closed : 09/12/25-12/12/25 2000-0600 :, Start time: 09/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 09/12/2025 20:00
Nearest town: 11.21 miles from Merthyr Dyfan.

51.58--3.29

Description: A470 : Southbound : Glyntaff : onslip : Roadworks : Closed : 08/12/25-12/12/25 2000-0600 :, Start time: 08/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 08/12/2025 20:00
Nearest town: 8.08 miles from Merthyr Dyfan.

51.53--3.25

Description: A470 : Southbound : Broadway Interchange : 08/12/25-12/12/25 2000-0600 : onslip : Roadworks : Closed :, Start time: 08/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 08/12/2025 20:00
Nearest town: 8.08 miles from Merthyr Dyfan.

51.53--3.25

Description: A4042 : Northbound : A4051 Interchange (Croes-y-Mwyalch) to Turnpike R/bout : 11/12/25-12/12/25 2000-0600 : Closed : Roadworks :, Start time: 11/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 06/12/2025 14:40
Nearest town: 18.72 miles from Merthyr Dyfan.

51.62--3

Description: A4042 : Southbound : Cwmbran to A4051 Interchange (Croes-y-Mwyalch) : 08/12/25-12/12/25 2000-0600 : Closed : Diversions in place :, Start time: 08/12/2025 20:00 , End Date: 12/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 08/12/2025 20:00
Nearest town: 18.72 miles from Merthyr Dyfan.

51.62--3

Location: southbound between junctions J21 (Weston super Mare) and J22 (Burnham on Sea) .

Lane Closures : Lane three will be closed.

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 21:00 on 11 December 2025 to 06:00 on 12 December 2025.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 18.91 miles from Merthyr Dyfan.

51.25--2.93

Location: northbound between junctions J22 (Burnham on Sea) and J21 (Weston super Mare) .

Lane Closures : Lane three will be closed.

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 21:00 on 11 December 2025 to 06:00 on 12 December 2025.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 18.83 miles from Merthyr Dyfan.

51.24--2.94

Location: northbound between junctions J22 (Burnham on Sea) and J21 (Weston super Mare) .

Lane Closures : The hard shoulder is closed.

Due to: Horticultural works.

Period : expect disruption until 16:00 on 11 December 2025.
Nearest town: 17.68 miles from Merthyr Dyfan.

51.33--2.89

Location: northbound between junctions J22 (Burnham on Sea) and J20 (Nailsea) .

Lane Closures : Lanes 1 and 2 will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : From 21:00 on 12 December 2025 to 20:01 on 13 December 2025.

Schedule : Expect disruption everyday between 20:00 and 06:00 from 15 December 2025 to 19 December 2025.

Lanes Closed : There will be two of three lanes closed.
Nearest town: 17.53 miles from Merthyr Dyfan.

51.34--2.89

Location: northbound between junctions J22 (Burnham on Sea) and J20 (Nailsea) .

Lane Closures : Lane three will be closed.

Due to: Emergency barrier repairs are planned.

Status : Pending.

Schedule : From 20:00 on 14 December 2025 to 06:00 on 15 December 2025.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 17.21 miles from Merthyr Dyfan.

51.35--2.9

Location: northbound between junctions J22 (Burnham on Sea) and J21 (Weston super Mare) .

Lane Closures : Lane one will be closed.

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 21:00 on 12 December 2025 to 06:00 on 13 December 2025.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 18.83 miles from Merthyr Dyfan.

51.24--2.94

Location: northbound entry slip at junction J20 (Nailsea) .

Lane Closures : Lane one will be closed.

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 20:00 on 12 December 2025 to 06:00 on 13 December 2025.

Lanes Closed : All lanes will be closed.
Nearest town: 19.1 miles from Merthyr Dyfan.

51.43--2.84

Location: southbound between junctions J20 (Nailsea) and J22 (Burnham on Sea) .

Lane Closures : The hard shoulder, lanes 1 and 2 are closed.

Due to: Roadworks.

Period : expect disruption until 06:00 on 12 December 2025.

Lanes Closed : There are two of three lanes closed.
Nearest town: 18.21 miles from Merthyr Dyfan.

51.39--2.86

Location: northbound at junction J20 (Nailsea) .

Lane Closures : The hard shoulder and lane 1 are closed.

Due to: Emergency Roadside Drains works.

Period : expect disruption until 04:00 on 12 December 2025.

Lanes Closed : There is one of three lanes closed.
Nearest town: 19.11 miles from Merthyr Dyfan.

51.43--2.84

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