Live road closures & traffic incidents

Stuck in traffic? Check whether the road you are on is closed right now. Live accident and emergency closures from National Highways and Traffic Wales are listed first, followed by roadworks in force and closures starting in the next 48 hours.

Live incidents

0

Accidents and emergency closures right now

Active roadworks

76

Works and lane closures currently in force

Starting soon

215

Closures planned in the next 48 hours

Cleared today

371

Closures resolved in the past 24 hours

Live incident
Active roadworks
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Cleared
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7 live and upcoming closures

Filters applied: Region: cardiff

Roadworks in force now

M4 : Eastbound : J33 Capel Llanilltern : Onslip closed : 03/09/26-06/09/26 2000-0600 : Diversions in place :

Active Roadworks Traffic Wales
Cardiff
Started Start time TBC

Description: M4 : Eastbound : J33 Capel Llanilltern : Onslip closed : 03/09/26-06/09/26 2000-0600 : Diversions in place :, Start time: 03/09/2026 20:00 , End Date: 06/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 28/08/2026 17:25

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M4 : Westbound : J32 Coryton : Onslip closed : Offslip closed : 01/09/26-03/09/26 2000-0600 : Diversions in place :

Active Roadworks Traffic Wales
Cardiff
Started Start time TBC

Description: M4 : Westbound : J32 Coryton : Onslip closed : Offslip closed : 01/09/26-03/09/26 2000-0600 : Diversions in place :, Start time: 01/09/2026 20:00 , End Date: 03/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 01/09/2026 20:00

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M4 : Eastbound : J32 Coryton : Offslip closed : Onslip closed : 03/09/26-06/09/26 2000-0600 : Diversions in place :

Active Roadworks Traffic Wales
Cardiff
Started Start time TBC

Description: M4 : Eastbound : J32 Coryton : Offslip closed : Onslip closed : 03/09/26-06/09/26 2000-0600 : Diversions in place :, Start time: 03/09/2026 20:00 , End Date: 06/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 28/08/2026 17:23

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M4 : Westbound : J30 Cardiff Gate : Onslip closed : 01/09/26-03/09/26 2000-0600 : Diversions in place :

Active Roadworks Traffic Wales
Cardiff
Started Start time TBC

Description: M4 : Westbound : J30 Cardiff Gate : Onslip closed : 01/09/26-03/09/26 2000-0600 : Diversions in place :, Start time: 01/09/2026 20:00 , End Date: 03/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 01/09/2026 20:00

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A470 : Northbound : Taff's Well : 17/08/26-07/09/26 2000-0600 : Improvement work : Entry slip road closed : Diversions in place :

Active Roadworks Traffic Wales
Cardiff
Started Start time TBC

Description: A470 : Northbound : Taff's Well : 17/08/26-07/09/26 2000-0600 : Improvement work : Entry slip road closed : Diversions in place :, Start time: 17/08/2026 20:00 , End Date: 07/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 17/08/2026 20:00

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A470 : Northbound : Taff's Well : Carriageway maintenance : Exit slip road closed : Diversions in place : 17/08/26-07/09/26 2000-0600 :

Active Roadworks Traffic Wales
Cardiff
Started Start time TBC

Description: A470 : Northbound : Taff's Well : Carriageway maintenance : Exit slip road closed : Diversions in place : 17/08/26-07/09/26 2000-0600 :, Start time: 17/08/2026 20:00 , End Date: 07/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 17/08/2026 20:00

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A470 : Both directions : Taff's Well : Carriageway maintenance : Entry slip road closed : Diversions in place : 17/08/26-07/09/26 2000-0600 :

Active Roadworks Traffic Wales
Cardiff
Started Start time TBC

Description: A470 : Both directions : Taff's Well : Carriageway maintenance : Entry slip road closed : Diversions in place : 17/08/26-07/09/26 2000-0600 :, Start time: 17/08/2026 20:00 , End Date: 07/09/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 17/08/2026 20:00

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