Highways England is planning to dual an eight-mile stretch of the A30 between Chiverton and Carland Cross.

The transportation authority launched a public consultation on the plans in January.

The scheme is part of the UK Government’s £15bn Road Investment Strategy announced in July. It aims to improve journey times for residents, businesses and visitors, unlocking one of the last bottlenecks in Cornwall.

“We were at the Golowan Festival in Penzance last weekend and received plenty of interest from both communities local to the scheme and holiday-makers.”

Highways England project manager Josh Hodder said: “Since consultation, we have been progressing with details of the design, working to reduce the impact on the environment, and continuing our engagement and discussions with local communities.

The A30 scheme will receive £8m from the European Regional Development Fund, with an additional £12m to be provided during construction.

The remaining cost for developing and delivering the upgrade will be provided by the government.

Subject to statutory approval, construction is expected to begin in 2020.

The transportation authority has urged people who will be affected by plans to cut congestion on one of the major roads in Cornwall to attend information events.

Hodder further added: “We were at the Golowan Festival in Penzance last weekend and received plenty of interest from both communities local to the scheme and holiday-makers, and we are keen to keep communities updated on our plans.

“I’d urge anyone with an interest to come and chat with us to find out more and answer any questions they have.”