A303 and A36 improvements
National Highways is responsible for the A303, A36 and M4 in Wiltshire. Wiltshire Council works with National Highways, the Department for Transport and neighbouring authorities to help make sure these routes support safe, reliable and sustainable journeys for local communities, businesses and visitors.
This page provides an overview of current and recent work affecting the A303 and A36 in Wiltshire.
A303 Improvements
The proposed A303 Amesbury to Berwick Down scheme, also known as the A303 Stonehenge scheme, was intended to provide a new dual carriageway between Amesbury and Berwick Down, including a tunnel past Stonehenge and changes at Countess Roundabout and Longbarrow. The scheme was granted a Development Consent Order in July 2023, but it is no longer being taken forward.
In July 2024, the Government announced that the A303 Stonehenge scheme would not proceed. In March 2026, the Secretary of State for Transport formally revoked the A303 Amesbury to Berwick Down Development Consent Order 2023, bringing the scheme to an end.
Wiltshire Council continues to recognise the long-standing congestion, journey reliability and local traffic issues on and around the A303. The council will continue to work with partners to consider future options for improving journeys and addressing the effects of traffic on local communities in the Amesbury and Stonehenge area.
A36 Salisbury corridor
National Highways is investing in improvements to the A36 through Salisbury. The current A36 Salisbury corridor programme is planned to run from January 2026 to 2031 and includes work to improve traffic signals, road markings, resurfacing and pedestrian crossing facilities.
The first phase includes upgrading traffic signals at St Paul’s, Castle and St Mark’s roundabouts. The new signals are designed to respond to traffic conditions in real time, helping to improve traffic flow, reduce queuing and improve journey reliability.
For the latest information about the A36 Salisbury corridor works, including closures and diversion routes, visit the National Highways A36 Salisbury corridor page.
