About the project
As part of the most direct route between the South East and the South West, the A303 between Amesbury and Berwick Down plays a big part in the daily lives of tens of thousands of people.
The current single carriageway is a bottleneck with congestion affecting the natural environment and blighting local villages, especially in the busy summer months. Average traffic flows are twice what it was designed for.
What’s more the road cuts through the Stonehenge World Heritage Site, running just 165 metres away from the most famous stone circle in the world.
Explore the interactive map
We plan to improve the A303 past Stonehenge with a new high quality dual carriageway and two-mile long tunnel, which will remove traffic from a large part of the Stonehenge landscape.
Explore the scheme in images and visualisations on our interactive map. Simply click the info points and image to expand.
Roads Investment Strategy announcement
A303/A358 corridor schemes included as part of the Roads Investment Strategy.Read more
Route options assessed
Options for the A303 Amesbury to Berwick Down scheme are evaluated by Highways England.Read more
Non-statutory consultation takes place between January and March, asking for feedback on route option proposals to upgrade the A303 past Stonehenge.Read more
Preferred route announced
The Secretary of State for Transport announces the preferred route for the scheme, including a twin-bore tunnel.Read more
Highways England holds a second public consultation between February and April, asking for feedback on design proposals for the preferred route.Read more
A supplementary consultation takes place in July and August, covering design changes made in direct response to feedback received earlier in the year.Read more
Highways England submits application for DCO (development consent order) to the Planning Inspectorate.View our application
People register with the Planning Inspectorate as an interested party and make formal representations about the scheme.Read more
A panel of Inspectors has six months to examine the application. People who have registered as interested parties can submit written representations and ask to speak at public hearings.
Within three months of the examination ending, the Inspectors complete their report and make a recommendation to the Secretary of State.
The Secretary of State then has three months to make a decision, followed by a public announcement.
Works start on site
The new dual carriageway and tunnel opens to the public.
Keep me updated on the A303 Amesbury to Berwick Down