All lanes on the M4 have reopened 13 hours after a man died following a crash near Newport.
Police were called to the incident on the motorway which involved a BMW X4, Vauxhall Agila, and a Volkswagen Polo between junctions 28 and 29 heading east on Monday evening around 9pm.
The 52-year-old driver of the Vauxhall from Newport died at the scene.
A 34-year-old man from Cardiff has been arrested on suspicion of causing death by dangerous driving and is currently being questioned.
On Tuesday morning, Traffic Wales were reporting the eastbound carriageway between Junction 30 Cardiff Gate to J28 Tredegar Park was closed and to expect delays of more than 90 minutes.
Drivers were being told to find alternative routes and to expect delays to bus services whilst emergency services remained at the scene.
Superintendent Mike Richards said:
“We know that there is likely to be a high level of travel disruption so we’re asking motorists to avoid the area and follow the diversions which are in place.”