Traffic St Mellons

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St Mellons
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Nearby: CardiffCaerphillyNewportCaerleonCwmbranBarry

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FULL SCREEN UPDATED: 15:21

Current traffic around St Mellons

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

NANTGARW

Description: A470NorthboundNantgarwCyclic maintenanceExit slip road closedDiversion07/09/26-19/09/26 2000-0600 :, Start time: 07/09/2026 20:00 , End Date: 19/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 07/09/2026 20:00
Nearest town: 7.35 miles from St Mellons. CLEARED @ 14:42

J32 CORYTON

Description: M4EastboundJ32 (Cardiff) CorytonResurfacing workEntry slip road closedDiversions in place17/09/26-18/09/26 2000-0600 :, Start time: 17/09/2026 20:00 , End Date: 18/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/09/2026 16:24
Nearest town: 5.78 miles from St Mellons. CLEARED @ 14:42

J32 CORYTON

Description: M4SouthboundJ32 (Cardiff) CorytonResurfacing workOffslip closedDiversions in place17/09/26-18/09/26 2000-0600 :, Start time: 17/09/2026 20:00 , End Date: 18/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/09/2026 16:25
Nearest town: 5.78 miles from St Mellons. CLEARED @ 14:42

M4 J24 COLDRA

Description: A449SouthboundM4 J24 Coldra14/09/26-17/09/26 2000-0600Improvement workClosedDiversions in place :, Start time: 14/09/2026 20:00 , End Date: 17/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 11/09/2026 18:18
Nearest town: 9.68 miles from St Mellons. CLEARED @ 14:42

CORYTON

Description: A470WestboundCoryton14/09/26-15/09/26 2000-0600Resurfacing workClosedDiversions in place :, Start time: 14/09/2026 20:00 , End Date: 15/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 12/09/2026 7:49
Nearest town: 5.78 miles from St Mellons. CLEARED @ 14:42

CORYTON

Description: A470WestboundCoryton15/09/26-22/09/26 2000-0600J32M4 Resurfacing workClosedDiversions in place :, Start time: 15/09/2026 20:00 , End Date: 22/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 12/09/2026 7:55
Nearest town: 5.78 miles from St Mellons. CLEARED @ 14:42

NANTGARW

Description: A470NorthboundNantgarw07/09/26-19/09/26 2000-0600Maintenance workExit slip road closedClosedDiversions in place :, Start time: 07/09/2026 20:00 , End Date: 19/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 12/09/2026 8:00
Nearest town: 7.35 miles from St Mellons. CLEARED @ 14:42

There are no current incidents in this location.

Roadworks

Traffic in Nearby Villages

Trowbridge (0.62mi)
Llanrumney (0.88mi)
Rhymney (1.21mi)
Marshfield (1.39mi)
Began (1.39mi)
Castleton (1.75mi)
Rumney (1.76mi)
Pentwyn (1.86mi)
Blacktown (1.86mi)
Newton (1.86mi)
Peterstone Wentlooge (1.96mi)
Llanedeyrn (1.96mi)
Michaelston y Fedw (1.96mi)
Pwll Mawr (1.96mi)
Coedkernew (2.77mi)
Clearwell (2.78mi)
Pen y lan (2.78mi)
Pen y lan (3.1mi)
Tremorfa (3.1mi)
Cyncoed (3.16mi)
Lisvane (3.34mi)
Roath Park (3.34mi)
Roath (3.51mi)
Pentre poeth (3.62mi)
Llanishen (3.72mi)
St Brides Wentlooge (3.77mi)
Draethen (3.78mi)
Heath (3.92mi)
Cathays (3.97mi)
Rudry (3.97mi)
Bassaleg (3.97mi)
Splott (3.97mi)

St Mellons

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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: A470 : Northbound : Nantgarw : Cyclic maintenance : Exit slip road closed : Diversion : 07/09/26-19/09/26 2000-0600 :, Start time: 07/09/2026 20:00 , End Date: 19/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 07/09/2026 20:00
Nearest town: 7.35 miles from St Mellons.

51.56--3.27

Description: M4 : Eastbound : J32 (Cardiff) Coryton : Resurfacing work : Entry slip road closed : Diversions in place : 17/09/26-18/09/26 2000-0600 :, Start time: 17/09/2026 20:00 , End Date: 18/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/09/2026 16:24
Nearest town: 5.78 miles from St Mellons.

51.53--3.25

Description: M4 : Southbound : J32 (Cardiff) Coryton : Resurfacing work : Offslip closed : Diversions in place : 17/09/26-18/09/26 2000-0600 :, Start time: 17/09/2026 20:00 , End Date: 18/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/09/2026 16:25
Nearest town: 5.78 miles from St Mellons.

51.53--3.25

Description: A449 : Southbound : M4 J24 Coldra : 14/09/26-17/09/26 2000-0600 : Improvement work : Closed : Diversions in place :, Start time: 14/09/2026 20:00 , End Date: 17/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 11/09/2026 18:18
Nearest town: 9.68 miles from St Mellons.

51.6--2.93

Description: A470 : Westbound : Coryton : 14/09/26-15/09/26 2000-0600 : Resurfacing work : Closed : Diversions in place :, Start time: 14/09/2026 20:00 , End Date: 15/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 12/09/2026 7:49
Nearest town: 5.78 miles from St Mellons.

51.53--3.25

Description: A470 : Westbound : Coryton : 15/09/26-22/09/26 2000-0600 : J32 : M4 Resurfacing work : Closed : Diversions in place :, Start time: 15/09/2026 20:00 , End Date: 22/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 12/09/2026 7:55
Nearest town: 5.78 miles from St Mellons.

51.53--3.25

Description: A470 : Northbound : Nantgarw : 07/09/26-19/09/26 2000-0600 : Maintenance work : Exit slip road closed : Closed : Diversions in place :, Start time: 07/09/2026 20:00 , End Date: 19/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 12/09/2026 8:00
Nearest town: 7.35 miles from St Mellons.

51.56--3.27

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