Drivers heading towards Shrewsbury faced long tailbacks after the crash happened westbound, beyond the last opportunity to turn off before the motorway becomes the A5.
Police and ambulance crews were sent to the scene after the crash happened at 7.20am.
Traffic was backed up from the site of the crash, between Junction 7 for the Wellington and Shrewsbury, to Telford with queues stretching past Junction 6 until around 9am.
There were also long queues of drivers waiting to use the exit road at Junction 7.
The extent of any injuries is not yet known.
The eastbound carriageway was unaffected by the crash.