At the risk of sounding cynical about the current state of UKGOV, you can't really bung your mates a hedge planting contract and expect to get something in return later.
And seeing the controversy is due to the fact that it's the whole landscape that is historic, arguing that you should put a massive a-historic hedge straight across it undermines the main argument against the other proposals.
Do you really think that the planners haven't thought of a hedge and discarded the idea?
10 years later, problem solved. And the tunnel is probably still being argued about in court.
I know this is a bit trite but it wouldn't surprise me given the UK government's record in this area, questionable transport policy is as British as complaining about the weather.
Bonus points for the noise reduction vs a hedge/fence.
What would solve the problem easily (rather than trying to hide it with a hedge), would be to do as they do up in Scotland in the national parks: Provide plenty of parking places anywhere the henge is in view. I drove through Galloway National Park a few weeks ago and every 200 yards the scenery changes to another amazing view and every 200 yards or so, there's somehwre you can safely stop and enjoy it. People can now safely stop to have a look and take photos, and traffic on the road can drive.
If people are amazed enough at a piece of national heritage that they want to admire it, hiding it from view seems like entirely the wrong response.
Rubbernecking is not the only problem. The existing A303 road splits the Stonehenge landscape in half. The whole ambiance of Stonehenge is kind of ruined by the roar of the trunk road running right next to it.
This might also be due to the fact that the largely dual-carriageway A303 narrows and becomes a single-lane road through the Stonehenge site.
But you know what would sort it… a hedge. A simple hedge. Stick something in the way of the drivers seeing the thing from the road, and you’ve cured the problem.
Why it is insisted that a multi-million (probably billion as costs will overrun) pound highway tunnel project is required, I have no idea. Just plant a bloody hedge!