Traffic Treharris

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Treharris
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Nearby: PontypriddPorthMerthyr TydfilAberdareCaerphillyEbbw Vale

SLIGHT

SEVERE

FULL SCREEN UPDATED: 12:59

Current traffic around Treharris

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

J26 MALPAS

Description: M4EastboundJ26 (Newport) Malpas16/12/25-17/12/25 2000-0600Maintenance workEntry slip road closedDiversions in place :, Start time: 16/12/2025 20:00 , End Date: 17/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:28
Nearest town: 13.98 miles from Treharris.

J37 PYLE TO J39 GROES

Description: M4WestboundJ37 (Porthcawl) Pyle to J39 Groes14/12/25-19/12/25 2000-0600Maintenance workClosedDiversions in place :, Start time: 14/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:17
Nearest town: 19.72 miles from Treharris. CLEARED @ 12:30

J32 CORYTON

Description: M4WestboundJ32 (Cardiff) Coryton17/12/25-19/12/25 2000-0600Maintenance workOnslip closedDiversions in place :, Start time: 17/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:19
Nearest town: 10.04 miles from Treharris. CLEARED @ 12:30

J24 COLDRA TO J26 MALPAS

Description: M4WestboundJ24 (Newport) Coldra to J26 (Newport) Malpas13/12/25-14/12/25 2000-0600Maintenance workClosedDiversions in place :, Start time: 13/12/2025 20:00 , End Date: 14/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:05
Nearest town: 15.81 miles from Treharris. CLEARED @ 12:18

J24 COLDRA TO J26 MALPAS

Description: M4WestboundJ24 (Newport) Coldra to J26 (Newport) Malpas15/12/25-16/12/25 2000-0600Maintenance workClosedDiversions in place :, Start time: 15/12/2025 20:00 , End Date: 16/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:09
Nearest town: 15.81 miles from Treharris. CLEARED @ 12:18

J38 MARGAM TO J37 PYLE

Description: M4EastboundJ38 (Port Talbot) Margam to J37 (Porthcawl) Pyle14/12/25-19/12/25 2000-0600Maintenance workClosedDiversions in place :, Start time: 14/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:14
Nearest town: 19.77 miles from Treharris. CLEARED @ 12:18

TAFF'S WELL

Description: A470NorthboundTaffs Well15/12/25-16/12/25 2000-0600Maintenance workEntry slip road closedDiversions in place :, Start time: 15/12/2025 20:00 , End Date: 16/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 11:42
Nearest town: 9.15 miles from Treharris. CLEARED @ 11:54

UPPER BOAT

Description: A470NorthboundUpper Boat18/12/25-20/12/25 2000-0600Maintenance workEntry slip road closedDiversions in place :, Start time: 18/12/2025 20:00 , End Date: 20/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 11:45
Nearest town: 6.28 miles from Treharris. CLEARED @ 11:54

UPPER BOAT

Description: A470NorthboundUpper Boat18/12/25-19/12/25 2000-0600Maintenance workExit slip road closedDiversions in place :, Start time: 18/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 11:48
Nearest town: 6.28 miles from Treharris. CLEARED @ 11:54

M4 J33 CAPEL LLANILLTERN

Description: A4232EastboundM4 J33 Capel Llanilltern11/12/25-19/12/25 2000-0600Maintenance workExit slip road closedDiversions in place :, Start time: 11/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 11:38
Nearest town: 10.97 miles from Treharris. CLEARED @ 11:42

PANT IND EST TO CEFN COED

Description: A465WestboundPant Ind Est to Cefn CoedIncidentBroken down vehicleLane closedDelay: s possible :, Start time: 13/12/2025 7:54 , Expected end time: 13/12/2025 11:52, Severity: Slight, Source: Welsh Government, Last updated: 13/12/2025 7:54
Nearest town: 7.76 miles from Treharris. CLEARED @ 08:06

There are no current incidents in this location.

Roadworks

Traffic in Nearby Villages

Taff Merthyr Garden Village (0.62mi)
Trelewis (0.62mi)
Quaker's Yard (0.62mi)
Craig Berthlwyd (0.62mi)
Melin Caiach (0.88mi)
Pentwyn Berthlwyd (0.88mi)
Edwardsville (0.88mi)
Mount Pleasant (1.39mi)
Llancaiach (1.39mi)
Ynysboeth (1.39mi)
Abercynon (1.39mi)
Ynysowen (1.75mi)
Merthyr Vale (1.75mi)
Nelson (1.76mi)
Cwmfelin (1.86mi)
Tyntetown (1.96mi)
Tai'r heol (1.96mi)
Aberfan (2.24mi)
Carnetown (2.24mi)
Penrhiwceiber (2.48mi)
Perthcelyn (2.48mi)
Bedlinog (2.48mi)
Newtown (2.56mi)
Penybryn (2.56mi)

Treharris

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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 : Eastbound : J26 (Newport) Malpas : 16/12/25-17/12/25 2000-0600 : Maintenance work : Entry slip road closed : Diversions in place :, Start time: 16/12/2025 20:00 , End Date: 17/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:28
Nearest town: 13.98 miles from Treharris.

51.6--3.01

Description: M4 : Westbound : J37 (Porthcawl) Pyle to J39 Groes : 14/12/25-19/12/25 2000-0600 : Maintenance work : Closed : Diversions in place :, Start time: 14/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:17
Nearest town: 19.72 miles from Treharris.

51.54--3.73

Description: M4 : Westbound : J32 (Cardiff) Coryton : 17/12/25-19/12/25 2000-0600 : Maintenance work : Onslip closed : Diversions in place :, Start time: 17/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:19
Nearest town: 10.04 miles from Treharris.

51.53--3.25

Description: M4 : Westbound : J24 (Newport) Coldra to J26 (Newport) Malpas : 13/12/25-14/12/25 2000-0600 : Maintenance work : Closed : Diversions in place :, Start time: 13/12/2025 20:00 , End Date: 14/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:05
Nearest town: 15.81 miles from Treharris.

51.6--2.96

Description: M4 : Westbound : J24 (Newport) Coldra to J26 (Newport) Malpas : 15/12/25-16/12/25 2000-0600 : Maintenance work : Closed : Diversions in place :, Start time: 15/12/2025 20:00 , End Date: 16/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:09
Nearest town: 15.81 miles from Treharris.

51.6--2.96

Description: M4 : Eastbound : J38 (Port Talbot) Margam to J37 (Porthcawl) Pyle : 14/12/25-19/12/25 2000-0600 : Maintenance work : Closed : Diversions in place :, Start time: 14/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 12:14
Nearest town: 19.77 miles from Treharris.

51.53--3.73

Description: A470 : Northbound : Taffs Well : 15/12/25-16/12/25 2000-0600 : Maintenance work : Entry slip road closed : Diversions in place :, Start time: 15/12/2025 20:00 , End Date: 16/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 11:42
Nearest town: 9.15 miles from Treharris.

51.54--3.26

Description: A470 : Northbound : Upper Boat : 18/12/25-20/12/25 2000-0600 : Maintenance work : Entry slip road closed : Diversions in place :, Start time: 18/12/2025 20:00 , End Date: 20/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 11:45
Nearest town: 6.28 miles from Treharris.

51.58--3.29

Description: A470 : Northbound : Upper Boat : 18/12/25-19/12/25 2000-0600 : Maintenance work : Exit slip road closed : Diversions in place :, Start time: 18/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 11:48
Nearest town: 6.28 miles from Treharris.

51.58--3.29

Description: A4232 : Eastbound : M4 J33 Capel Llanilltern : 11/12/25-19/12/25 2000-0600 : Maintenance work : Exit slip road closed : Diversions in place :, Start time: 11/12/2025 20:00 , End Date: 19/12/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 13/12/2025 11:38
Nearest town: 10.97 miles from Treharris.

51.51--3.31

Description: A465 : Westbound : Pant Ind Est to Cefn Coed : Incident : Broken down vehicle : Lane closed : Delays possible :, Start time: 13/12/2025 7:54 , Expected end time: 13/12/2025 11:52, Severity: Slight, Source: Welsh Government, Last updated: 13/12/2025 7:54
Nearest town: 7.76 miles from Treharris.

51.77--3.39

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