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Author Topic: HS4Air  (Read 1451 times)
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« on: March 07, 2018, 05:42:26 pm »

 Roll Eyes Tongue

Apologies. There is a map in that article but I still haven't got the knack of copying those over to here (Note to self: Must speak to CfN Tongue)

HS4Air: A new railway proposal revealed for South East England

A new railway route has been proposed by London firm Expedition, creating a high-speed railway version of the M25, connecting both Gatwick and Heathrow airports…

An HS4Air proposal has been revealed for South East England
Expedition, a London-based engineering consultancy firm, have revealed their proposal for a new high-speed railway called HS4Air (High-Speed for Air).

The new railway would connect the existing HS1 with the planned HS2, linking both Gatwick and Heathrow airports. Also included would be a connection to the Great Western Main Line railway (GWML).

Along this planned route, passengers would be able to travel to either airport from cities such as Birmingham, Manchester, Leeds and Cardiff without the need to change trains; reducing road congestion, air pollution and travel times. Journey duration from Sussex and Kent to the Midlands and the West would also be reduced by up to one hour.

Moreover, HS4Air would bring direct international train services, from the Midlands and the North to Europe via the Channel Tunnel. The high-speed rail service to the city centre of Paris, from both Birmingham and Manchester, would be faster in comparison to flying.

Director of Expedition, Alistair Lenczner, Leader of the HS4Air proposal, said: “HS4Air has been developed to allow rail and aviation infrastructure projects in South East England that are currently unconnected to become joined-up. This will offer greatly enhanced benefits for users and provide better value for the investments currently being made in the UK’s strategic infrastructure.”

With HS4Air, South East England’s transport network would become more environmentally-friendly with reduced carbon emissions and less air pollution. The region would experience stimulated economic growth across the nation as a result from the stronger transport links between cities. The nation’s distribution networks could also benefit from HS4Air by running cables and pipes alongside the railway.

“In a way HS4Air can be regarded as a high-speed railway version of the M25 around London, except that it allows much faster journey times with no congestion and with far less impact on the environment,” continued Alistair.

The proposal illustrates the route to be approximately 140km-long between the connections with HS1 at Ashford and HS2 near Denham. Twenty per cent of the line would be tunnelled to avoid impacting the landscape and 40 per cent would re-use the existing straight railway running between Tonbridge and Ashford which would require simple upgrading to operate high-speed trains.

“The proposed HS4Air project is an example of integrated strategic planning that spans across multiple infrastructure sectors that are too often planned within separate ‘silos’,” said Alistair. “Such integrated planning allows projects to achieve better results in terms of their land-use efficiency and investment value.”

Using the cost estimates from HS2 Phase 1, HS4Air has been estimated to cost approximately £10 billion and is expected to provide a similar transport network integration that already exists in France, Germany, the Netherlands, Belgium and Switzerland.
« Last Edit: March 07, 2018, 05:48:17 pm by SandTEngineer » Logged

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« Reply #1 on: March 07, 2018, 06:57:21 pm »

Like this?

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« Reply #2 on: March 07, 2018, 08:17:19 pm »

Interesting idea.  I see the following potential markets, each of which has different benefits:

  • High speed airport interchange LHR – LGW.  This would seem to have the highest benefit in comparison with the current road journey on the M25 or rail via Farringdon.

  • Connections between LHR and the Midlands / North.  There would be obvious benefits in a direct train but the frequency would need to be similar to the 4 tph (at least) LHR to Old Oak Common and the 2tph(?) north from OOC.

  • Connections between the SE and the Midlands / North.  There would be speed benefits compared to travel into London to connect at Euston.  This would be counteracted by a lower train frequency than via Euston.

  • Connections between the Channel Tunnel and the Midlands / North.  This has been discussed in great detail elsewhere in terms of connecting HS1 and HS2 in London.  The arguments against this have included the problems of managing customs / immigration and the relatively low current demand of air services from Manchester etc to Paris.

I would be a lot happier with this type of press release if it gave forecast order of magnitude figures for passengers and the likely fare structure.
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« Reply #3 on: March 07, 2018, 10:48:07 pm »

I think that a few years back it was in the news that DfT were looking into the idea of a high-speed railway line alongside the M25/M23 to join the two airports. I don't remember seeing any more than that, and certainly nothing official, but it did remind me that I thought that was a good idea when the M25 was being built. It would give about 20 minutes for that journey, with the idea it could even be done airside so the two airports could be operated as one for interchange/hub purposes.

Following on from that, there is a convenient straight line already going from Redhill towards Ashford to repurpose - and replace by some nearby alternative if the locals want. That would have offered a choice of short route into a London Eurostar terminal from along the M25. And of course it could have linked onward from Heathrow into whatever the railways would become from then on (which was none too clear at the time).

This latest proposal doesn't put the line alongside a motorway, which may be a disadvantage. Putting the two together is common elsewhere (especially in France) - mainly because if you've ruined one linear neighbourhood for living in already, a bit more ruining isn't such a big deal. It works even better when the road is being built (as in my original M25 idea).
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« Reply #4 on: March 08, 2018, 10:39:00 am »

Al;so seen this referred to as HS4M25 :-)
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« Reply #5 on: May 10, 2018, 07:52:26 am »

Sorry to be so negative, but its another silly idea that won't happen! Just as the link between Windsor & Eton Central & Eton Riverside will never happen.
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