The North West Air Ambulance was called to the M6 in Lancashire this afternoon after an accident involving a car.
The car was on its roof and passengers were treated at the scene by paramedics.
Emergency services were alerted after a collision on the southbound carriageway between junction 33 at Galgate and 32 at Broughton at about 2pm.
The incident caused delays and slow-moving traffic before the carriageway was cleared.
No further details have been released.
The accident came just 24 hours after a major incident which led to the M6 southbound being closed overnight between Lancaster and Galgate.