Drivers on the M1 in Northamptonshire faced long delays on Friday evening after the motorway was closed following a serious crash.
The motorway was closed northbound between junction 15 and 15a shortly before 5pm after a crash involving a lorry and four cars.
Queues of traffic have built up back to junction 13 and motorists were advised to use alternative routes.
Northants RPU tweeted at 6.10pm : “M1 at junction 15 is likely to be closed for a couple of hours folks. Please avoid the area.”
The road was reopened by 10pm on Friday.