Ahead of construction starting on the scheme between Sparkford and Ilchester in September, Highways England will be updating communities and users on the latest progress and plans.
A virtual exhibition will be held this week where residents along the route can find out more and put questions to the project team.
Hannah Sanderson, Programme Manager for Highways England, said:
The scheme is incredibly important for Somerset's future, vital to the A303 / A358 corridor, and is part of the biggest investment in our road network for a generation alongside the A303 Stonehenge tunnel project.
From a project perspective, it's exciting that we are now close to works starting in September, with the scheme supporting economic growth and facilitating a growth in jobs and housing by creating a free-flowing and reliable connection between the south east and south west.
It will also tackle a long-standing bottleneck, reduce journey times to the south-west and improve traffic flows in that area at peak times and during peak seasons.
While closures will be kept to a minimum, I'm sure local residents will have questions around the latest plans and traffic management, so we encourage everyone to join the virtual exhibition.
The virtual exhibition will run from midday to 8pm on Thursday 22 July and Friday 23 July, where people will be able to post questions on a live chat.
You'll be able to visit the virtual exhibition with a link that will be available from Thursday 22 July on our A303 Sparkford to Ilchester web page.
Anyone unable to log in on the day can leave a comment on the exhibition or contact us by emailing