Stonehenge road tunnel the scheme in 2018. A cost of £1.6 billion and a planned start date in 2021 were indicated. English Heritage, the National Trust and Historic England are quoted as supporting the concept of the tunnel with some concerns about the linking of byways, whilst the Stonehenge Alliance and Friends of the Earth remain opposed, as are the Campaign for Better Transport. Stonehenge road tunnel The Stonehenge road tunnel is a planned tunnel in Wiltshire, England drawn up by Highways England to upgrade the A303 road. It would move the A303 into a tunnel under the Stonehenge World Heritage Site, completing
Stonehenge atop mounds. The mounds are known as "barrows" although they do not contain burials. Stonehenge Avenue, a parallel pair of ditches and banks leading to the River Avon, was also added. Two ditches similar to Heelstone Ditch circling the Heelstone (which was by then reduced to a single monolith) were later dug around the Station Stones. During the next major phase of activity, 30 enormous Oligocene-Miocene sarsen stones "(shown grey on the plan)" were brought to the site. They may have come from a quarry around north of Stonehenge on the Marlborough Downs, or they may have been collected from