Police are appealing information from people who witnessed the fatal collision on the M4 Eastbound this morning.
A 67-year-old man from the Cardiff area died after a vehicle collided with a wall and an electrical sub-station.
CCTV shows a number of motorists stopping at the side of the vehicle immediately after the collision, officers are particularly interested in speaking to these people. They include heavy goods vehicle drivers, and one man who actually got out of the passenger side of a passing vehicle and walked over to have a look inside.
Witnesses are asked to contact Gwent Police’s Collision Investigation Unit on 01633 642404.
More top news
Two female doctors have appeared at Cardiff Crown Court accused of the manslaughter of a 12-year-old boy in their care.
The contest's 'flag policy' says only official national flags of participating countries are allowed.
A car was left completely submerged by water after a driver was caught out by the tide when he drove onto the beach at Burry Port.