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Long delays near M4 at Cardiff after huge queues form | Wales Online


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LIVE EVENT ENDEDLast updated 21st July 2026

Long delays near M4 at Cardiff after huge queues form

Traffic built up back to the M4

Queues for drivers at Culverhouse Cross(Image: Traffic Wales )

Drivers travelling near the M4 at Cardiff faced long delays on Tuesday evening as heavy congestion built up on a major route. There were long queues on the A4232 towards Cardiff, with miles of congestion reported.

The slowest traffic was near Culverhouse Cross, but queues backed up towards the M4.

Follow our live traffic updates below. You can also follow all the latest traffic updates below and remember you can get daily breaking news updates on your phone by joining our WhatsApp community here.


New Updates
21st Jul18:35 BST
Traffic returns to normal

Traffic has returned to normal on the A4232. There were long queues for those heading towards this afternoon as congestion built up between the M4 and Culverhouse Cross.

Traffic on the dual carriageway is now flowing freely, with only some short delays around the Culverhouse Cross junction remaining.

21st Jul18:12 BST
Queues remain

Delays are starting to ease following rush hour, but there are still queues for drivers around Culverhouse Cross. Here is the latest image from Traffic Wales cameras at the junction:

21st Jul17:55 BST
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21st Jul17:49 BST
Heavy congestion reported

There is heavy congestion on a number of stretches of the A4232, according to AA Traffic Planner. The busiest areas are just off the M4 and around Culverhouse Cross.

(Image: AA Traffic Planner )

21st Jul17:39 BST
Delays in both directions

There is congestion in both directions, the latest images from Traffic Wales cameras show. There is some slow traffic for drivers heading out of Cardiff towards the M4, but the longest delays are for those heading to the city.

The slowest traffic is around the Culverhouse Cross junction.

(Image: Traffic Wales )

21st Jul17:31 BST
Long queues

There are long queues for travelling inbound on the A4232 towards Cardiff this evening. The latest images from Traffic Wales cameras show severe congestion between Culverhouse Cross and the M4.

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