A303

Replacement of the existing single two-lane road between existing sections of dual carriageway at Amesbury (the Countess roundabout) and Berwick Down (west of Winterbourne Stoke) with a new, purpose-built dual two-lane road. The new section of road will be at least partly in deep bored tunnel in order to avoid the sensitive landscape surrounding Stonehenge. The new road is likely to conform to Highways England's new "expressway" standard and include grade separation of Countess Weir Roundabout which is presently laid out to allow for a flyover to be built.

Construction of a new dual two-lane road to replace the existing single two-lane A303 between Sparkford and Podimore, east of Ilchester. The new road will link two existing sections of dual carriageway and alleviate the congestion that builds up at this bottleneck, especially during the summer months.

The new road is likely to be built to Highways England's new "expressway" standard, and may include provision of a flyover or underpass at Podimore Roundabout, which was built in the mid-1990s with provision for future grade separation.

Construction of a new roundabout at Airman's Corner. Here the new roundabout will be slightly to the south of the existing junction with the A344. This will form the entrance way to the new Stonehenge Visitor Centre. At Longbarrow Crossroads, the existing A360/A303 roundabout will be remodelled within the existing land take. The section of A344 linking to the A303 will be closed as part of this scheme.

Upgrade of all the remaining single-carriageway sections of A303 between the associated works at Stonehenge and the Horton Roundabout at Ilminster. The new dual carriageway sections will be grade-separated and built to dual two-lane standard. From Ilminster, the A358 will be upgraded to reach the M5.

This scheme was withdrawn following the cancellation of the Stonehenge Tunnel scheme in 2010.

Reconstruction of the A303 junction at Boscombe Down, east of Amesbury, about 2.5 miles east of Stonehenge. The new interchange will provide full access, adding the missing west-facing sliproads, and will replace the existing bridge. This is the earliest phase of the A303 realignment scheme that will eventually see the road tunnelled under the Stonehenge site. The new interchange will be renamed Solistice Park.

New three kilometre dual-tube bored tunnel to carry the A303 past the National Trust and World Heritage Site of Stonehenge. This will both remove traffic from the existing A303, which runs just a few yards from Stonehenge itself, and provide additional capacity as the existing road is single carriageway. The scheme includes improvements close to the site also, including a bypass at Winterbourne Stoke and a flyover at Countess Roundabout.