A major A-road through Wiltshire will shut for three months during a significant roadworks project.

The A360 will close between its junction with The Avenue, near Salisbury, and the Longbarrow junction with the A303 from Tuesday, April 2.

The busy route will remain shut for three months while works are carried out by Scottish and Southern Electricity Networks in relation to the planned A303 Amesbury to Berwick Down upgrade past Stonehenge.

This scheme is being implemented on behalf of National Highways and will involve installing high voltage and fibre optic cabling along the road.

These cables will provide electricity for the major upgrade scheme on the A303, powering both construction and the planned tunnel in the long term.

A full closure is necessary during this period for safety reasons due to the narrow width of the road and the minimal spaces along the verges.

Work will be carried out seven days a week with some overnight working to allow the closure to be lifted before the school summer holidays.

National Highways says the works could have taken up to a year if single-lane closures and traffic signals were employed.

The diversion route will see drivers follow the A345, and sections of the A303 and A36, and National Highways has warned delays are likely.

Motorists have been advised to plan their journeys ahead of time and allow extra time to reach their destination.

Andrew Clark, National Highways’ project manager for the A303 Stonehenge scheme, says measures are in place to minimise the impact of the road closure.

He added: “The road scheme will ultimately tackle the longstanding issue of rat running and provide a real benefit to local communities, and for this essential preliminary work, we are doing all we can to put in measures to lessen the impact for local communities and the travelling public.

“We need to carry out the work now to maintain our programme, we appreciate that roadworks and road closures can be frustrating and we’d like to thank motorists, local residents, and businesses in advance for their patience.

“Without the full closure, the work would take a lot longer to complete, and working with Wiltshire Council, we’re making every effort to ensure that the impact on drivers and local communities is kept to an absolute minimum.”

A comprehensive signage system will be in place all the way from Devizes to Salisbury to point traffic to the alternative routes.