The Prince of Wales Bridge has finally reopened after a lorry crashed down the embankment and onto land alongside the M4 Westbound.
All lanes were closed on the M4 Westbound between J21 (M48 / Chepstow) and J22 (M49 / Avonmouth).
Repair work had to be carried out to the central reservation and the barriers before the lanes could be reopened.
This meant lanes were closed for more than 12 hours, they have now fully reopened all lanes.
The lorry is believed to have hit the central reservation and then ended up off the road.
Despite a passing doctor performing CPR on the driver, he has since died of his injuries.
Gwent Police are at the scene and are advising motorists to avoid the area due to the heavy traffic. Both eastbound and westbound sides of the bridge were closed for a time on Wednesday evening.
The M4 westbound road is closed and police say they expect it will be closed all day and into the evening.
Highways England says the central barrier of the bridge is "in the process" of being repaired but a reopening time has not been given.
Traffic is being diverted on to the M48 where traffic is will be heavier than usual.
Gwent Police are appealing for anyone who saw what happened to get in touch with them.