Drivers travelling on the M25 face delays of more than 30 minutes following a crash.
The collision happened on the clockwise carriageway just after junction 23 for the A1 and South Mimms.
Traffic officers and police were called to the scene before 7.40am and all traffic was temporarily held.
National Highways says traffic was released by 8am but one lane of four remains closed.
It has led to delays of 30 minutes with six miles of congestion.
Traffic has now been released on the #M25 clockwise within J23, near #PottersBar following the earlier collision. Lane 1 (of 4) remains closed due to this incident. There are delays of 30 minutes on the approach with 6 miles of congestion. pic.twitter.com/gQq8XCQ1Hy
— National Highways: East (@HighwaysEAST) October 21, 2022
Traffic is particularly slow between junction 22 for London Colney and junction 23. It is also queuing approaching junction 22.
There are also delays at Bignells Corner, by South Mimms services, where the M25 and A1 meet and there are also queues in both directions on the A1 approaching Bignells Corner.
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