The A12 near Southwold has been reopened by police after a serious collision between two cars.
The incident happened between the A1095 at Blythburgh and Hill Road shortly before 7pm on Wednesday.
The road was closed in both directions to deal with the crash, with the ambulance service also called.
Suffolk police later confirmed a man in his 30s died en route to hospital.
Five Suffolk Fire and Rescue Service crews from Southwold, Halesworth, Wrentham and Lowestoft South stations were also sent to the collision.
Crews stood down shortly before 8pm.
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