https://www.theothersideofmidnight.com/2024-06-22-bulldozers-under-stonehenge/
Any new A-Road or motorway shouldn't have to go under or anywhere too close to such a historical site.
However, according to drawings and plans, the stonehenge-tunnel-section might get no closer than 200m of the ancient site. But is that enough distance?
https://nationalhighways.co.uk/our-roads/a303-stonehenge/fact-checker Obviously, the motorway should be as far away from the ancient site as much as possible.
https://www.nationalgeographic.com/travel/article/reviving-europes-first-superhighway Its also important to try to preseve ancient roads and pathways.