A driver has been arrested on suspicion of drug driving after a serious crash on the A14 which left a man in hospital with serious injuries.
Two cars crashed just past the junction for the A140 at Creeting St Mary near Needham Market in Suffolk at around 6.40am on Monday.
Police said the road was closed in both directions and warned of long delays, though it had reopened westbound by 11.30am.
One man suffered serious injuries and was airlifted to Addenbrooke's Hospital in Cambridge for treatment.
A driver was arrested on suspicion of drug driving and will be questioned "in due course", said police.
National Highways earlier reported delays of 20 minutes and two miles of congestion leading up to the crash site.