The National Highways proposed A303 Stonehenge scheme is intended to improve the A303 past Stonehenge between Amesbury and Berwick Down.

• New eight-mile dual carriageway with a two mile tunnel under much of the World Heritage Site
• A new junction at the Countess roundabout so the A303 will run directly over the A345
• Bypass to the north of the small village of Winterbourne Stoke, with a viaduct over the River Till valley
• A new junction between the A303 and A360 moving the existing Longbarrow roundabout away from the World Heritage Site