20 August 2012
Last updated at 10:17 GMT
Traffic tailbacks stretched four miles to Tredegar Park
Traffic is moving very slowly on the M4 eastbound at Newport following a crash in one of the Brynglas tunnels.
The incident involving a car and a van at 09:55 BST on Monday closed one of two lanes on the eastbound carriageway through the tunnel just east of junction 26 at Malpas.
Average speed of vehicles is down to 10mph, and traffic congestion was trailing back four miles to junction 28 of the M4 at Tredegar Park.
The lane later reopened.
Gwent Police said no-one was injured in the collision between a Citroen C2 and a Fiat Doblo van.
The Citroen driver, 17, from Aberdare, was reported for driving without due care and attention.R Soft Web Hosting