Cardiff traffic conditions - incidents & roadworks

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Current traffic around Cardiff

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

J30 CARDIFF GATE

Description: M4EastboundJ30 (Cardiff) Cardiff GateCongestionoffslipDelay: s possible :,Start time: 18/06/2026 8:23 ,Expected end time:18/06/2026 11:23,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 8:23
Nearest town: 4.96 miles from Cardiff. CLEARED @ 08:30

A48 INTERCHANGE TO M4 J33 CAPEL LLANILLTERN

Description: A4232NorthboundA48 Interchange to M4 J33 Capel LlanillternCongestionDelay: s possible :,Start time: 18/06/2026 7:38 ,Expected end time:18/06/2026 11:38,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:38
Nearest town: 5.22 miles from Cardiff. CLEARED @ 07:54

J32 CORYTON

Description: M4EastboundJ32 (Cardiff) CorytonoffslipCongestionDelay: s possible :,Start time: 18/06/2026 7:39 ,Expected end time:18/06/2026 9:09,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:39
Nearest town: 4.83 miles from Cardiff. CLEARED @ 07:54

NANTGARW

Description: A470NorthboundNantgarwCongestionoffslipDelay: s possible :,Start time: 18/06/2026 7:46 ,Expected end time:18/06/2026 9:16,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:46
Nearest town: 7.44 miles from Cardiff. CLEARED @ 07:54

J33 CAPEL LLANILLTERN

Description: M4EastboundJ33 (Cardiff) Capel LlanillternCongestionoffslipDelay: s possible :,Start time: 18/06/2026 7:25 ,Expected end time:18/06/2026 11:25,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:25
Nearest town: 6.38 miles from Cardiff. CLEARED @ 07:42

NANTGARW TO CORYTON

Description: A470SouthboundNantgarw to CorytonCongestionDelay: s possible :,Start time: 18/06/2026 7:03 ,Expected end time:18/06/2026 9:03,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:03
Nearest town: 6.18 miles from Cardiff. CLEARED @ 07:18

There are no current incidents in this location.

Roadworks

Traffic in Nearby Villages

Splott (0.2mi)
Caerdydd (Cardiff) (0.57mi)
Cardiff (Caerdydd) (0.57mi)
Monmouthshire and Brecon Canal (0.63mi)
Roath (0.8mi)
East Moors (0.83mi)
Cathays (0.96mi)
Tremorfa (1.06mi)
Riverside (1.17mi)
Cathays Park (1.17mi)
Butetown (1.19mi)
Blackweir (1.41mi)
Pen y lan (1.42mi)
Grangetown (1.57mi)
Canton (1.79mi)
Maindy (1.83mi)
Pontcanna (1.95mi)
Roath Park (2.11mi)
Mynachdy (2.28mi)
Gabalfa (2.28mi)
Heath (2.35mi)
Pwll Mawr (2.4mi)
Rumney (2.43mi)
Llandochau (Llandough) (2.45mi)
Llandough (Llandochau) (2.45mi)
Llandaff (2.53mi)
Cogan (2.58mi)
Leckwith (2.62mi)
Cyncoed (2.72mi)
Llanedeyrn (2.75mi)
Llandaff North (2.79mi)
Newton (2.93mi)

Cardiff

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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 : J30 (Cardiff) Cardiff Gate : Congestion : offslip : Delays possible :,Start time: 18/06/2026 8:23 ,Expected end time:18/06/2026 11:23,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 8:23
Nearest town: 4.96 miles from Cardiff.

51.54--3.13

Description: A4232 : Northbound : A48 Interchange to M4 J33 Capel Llanilltern : Congestion : Delays possible :,Start time: 18/06/2026 7:38 ,Expected end time:18/06/2026 11:38,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:38
Nearest town: 5.22 miles from Cardiff.

51.49--3.29

Description: M4 : Eastbound : J32 (Cardiff) Coryton : offslip : Congestion : Delays possible :,Start time: 18/06/2026 7:39 ,Expected end time:18/06/2026 9:09,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:39
Nearest town: 4.83 miles from Cardiff.

51.53--3.25

Description: A470 : Northbound : Nantgarw : Congestion : offslip : Delays possible :,Start time: 18/06/2026 7:46 ,Expected end time:18/06/2026 9:16,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:46
Nearest town: 7.44 miles from Cardiff.

51.56--3.27

Description: M4 : Eastbound : J33 (Cardiff) Capel Llanilltern : Congestion : offslip : Delays possible :,Start time: 18/06/2026 7:25 ,Expected end time:18/06/2026 11:25,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:25
Nearest town: 6.38 miles from Cardiff.

51.51--3.31

Description: A470 : Southbound : Nantgarw to Coryton : Congestion : Delays possible :,Start time: 18/06/2026 7:03 ,Expected end time:18/06/2026 9:03,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 7:03
Nearest town: 6.18 miles from Cardiff.

51.54--3.26

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