Like your hypothetical HS2? Your points 2 and 3 about greenbelt land are rendered laughable if you propose cutting a new alignment through the North Yorkshire Landscape.
They are?
The land is cheap and the fact remains that there are some road connections, compared to a random greenfield site with nothing at all.
And I'll reiterate a couple of my earlier points, how many billions would it cost, compensation would have to be paid, how environmentally and socially damaging would it be to cut a new HS line to London via Leeds and Birmingham to save what? Minutes off the existing and more direct route to London via the ECML.
The current Darlington-Dinsdale travel time is 5 minutes and the Darlington-Allens West journey time is 12 minutes.
That would tend to indicate a travel time to Teeside Airport of six or seven minutes.
Even if you add a nice ten minute connection time (easily sufficient considering the short journey use loose only 17 minutes from central Darlington).
Upgrades linked to new rolling stock could probably improve this performance still further.
A 2hr Journey time was rather pessimistic it now appears, it should be roughly 17-18 minutes more than a journey to Leeds if it has a similar stopping pattern.... which takes us to the 1hr50 or so mark. Which is rather less than the 2hr30 that appears to be the typical journey time.
Even if you lose ~17 minutes on the transit (which is probably excessive) you save nearly
25 minutes.
On the point of parkway stations, which I found whole heartedly repulsive, What is the point of siting parkway stations 30 minutes away from major regional urban centres on a high speed railway which is only saving that on existing lines which forge right into the heart of these very important regional econimic and social centres? All it is favouring is mass commuting to London and a mass exodus of economic activity from these centres in my opinion.
Firstly, as noted above, 30 minutes is probably an excessive estimate, especially if TVM does eventually happen and push the frequency towards turn up and ride.
Secondly the saving of 20 minutes I estimated earlier was deliberately pessimistic and savings of 40 minutes are achievable.
The "mass exodus" of economic activity is
already occurring, we can't hope to stop it.
People will simply move closer to London if they can't commute from the north. By deploying high speed rail we push the viable commuter belt further north which will spread the load of London's commuters over more ground.
London's dominance is essentially irreversible, the country is simply too small and travel speeds are already too high for anywhere south of Newcastle to hope to remain economically "independent".
If the rest of the country wants to tap London's potential then we must
all become Londoners.
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Have you any idea what such macro scale barriers running through the landscape can do ecologically?
Yes, and this can be ameliorated by providing wildlife underpasses..... but since you aren't suggesting pulling up the ECML then you must consider it is an acceptable loss?
If there are no noise complainers around you could just put the whole thing on a cheap prefabricated concrete viaduct a few metres above the ground.