Overview
- Westbound traffic remains affected between J28 Tredegar Park and J30 Cardiff Gate with lanes two and three open and lane one blocked.
- AA and Inrix report severe delays peaking at about 94 minutes with average speeds around 5 mph.
- South Wales Fire and Rescue Service says crews extricated a trapped person and dealt with a second four-car crash about 200 metres away.
- Drivers are being diverted via the A48 past the Garden Centre to Pontprennau and then the A4232 Pentwyn Link Road.
- Eastbound flow is slow due to onlookers, with Met Office amber warnings linked to Storm Claudia increasing risks of difficult driving and disruption.