I think people are really missing the fecking point here. The tunnelling out of millions of cubic shintloads of soil and archaeology will create a Silbury somewhere else. The crazy excavators, JCBs, Lorries, big tunnelly-borer machines and tarmac laying gear will for sure be a blight on the landscape. The debate here (and elsewhere) seems to rotatey-diskers on whether the tunnel should be...
1. the size that the feckwads are planning on building
or
2. much, much bigger and much much longer.

Now shall it be the Horseless Carriage or the Iron Horse? Shall it be the knife or the briny deep?
No-one has suggested that those visitors to Stonehenge who dislike traffic should just learn to fecking live with it. How did the offended tourists get to Stonehenge in the first place - perhaps by hoverboard? If the sounds of passing lorries and agricultural vehicles offends them perhaps Stonehenge should be uprooted and re-erected somewhere much quieter (perhaps in Norfolk). No-one has mentioned my designs and plans for a possible flyover bridge. No-one has seriously looked at green camo-canvas masking of the current road to protect the eyes of the 21st Century needy and sensitive.

Perhaps we really need to look at the demolition, flattening and re-landscaping of Callanish Village? And the subsequent submerging of the A858 in a tunnel and eradicating all modern agriculture on Lewis so that our 21st Century senses aren't offended by the sound of Texel Sheep and Massey Fergusons.

Let us look at Orkney. Burn the Viking Sagas! Throw George MacKay Brown's works on the peat hearth flame! The A895 will have to buried under a tunnel! The little townships and broch stumps will have to go. Use them as backfill for the tunnel! Let us get remixing, remodelling and re-imaginising Orkney back to the active period of Ring of Brodgar. Or shall it be the active period of Skara Brae? Who cares? As long as it isn't today. Or tomorrow.