The Anonymous Widower

HS4Air’s Connections To HS2, The Great Western Main Line And Heathrow

This map clipped from the Expedition Engineering web site, shows the route of HS4Air to the West of London.

Note the M25 running North-South through the area.

The HS4Air And HS2 Junction

This Google Map shows the area, where HS4Air will join HS2.

Note.

  1. The M25 running North-South.
  2. The Chiltern Main Line running East-West.
  3. The two stations shown are Denham Golf Club and Denham.
  4. At the top of the map, just to the East of the M25 is a large quarry, which shows up in a beige colour.

The route of HS2 as it passes through the area from North-West to South-East is as follows.

  • HS2 crosses the M25 in a tunnel, at the point where the lane crosses just below the M25 label, at the top of the map.
  • HS2 then goes South East towards Denham on a mixture of cuttings, embankments and viaducts.
  • HS2 then follows the Chiltern Main Line in a cutting towards London.
  • HS2 goes into a tunnel just to the West of West Ruislip station.

It looks to me, that HS4Air will branch off HS2, just to the East of the M25, in the area of the quarry, which is shown in this Google Map.

HS4Air would continue along the M25 motorway towards the South, whilst HS2 will continue in to the South East.

The HS4Air And Great Western Main Line Junction

This Google Map shows the area, where HS4Air crosses the Great Western Main Line.

Note.

  1. The M25 running North-South
  2. The M4 running East-West
  3. The Great Western Main Line running East-West.
  4. The two stations are Langley and Iver.
  5. Iver North Water Treatment Works sitting to the North East of where the M25 and the Great Western Railway cross.

This Google Map shows the area, where the M25 and the Great Western Main Line cross in more detail.

Consider.

  • HS4Air would be following the M25 North-South.
  • Two links to allow trains to go both ways from the Great Western to the Southbound HS4Air, would be needed.
  • These links could loop over the Water Treatment Works.
  • As the M25 will probably need widening, combining both projects would probably benefit both.

I think we could see a spectacular junction.

HS4Air North Of Heathrow

|As the first map shows HS4Air goes underneath Heathrow Airport in a tunnel, where there will be a station in the tunnel.

This map shows the M25 to the North of the Airport.

Terminal 5 at Heathrow is picked out with a station symbol.

I suspect that HS4Air will cross the massive M25/M4 junction on a viaduct and then descend into a tunnel for the Airport.

Or if the third runway at Heathrow is built, the railway could go into tunnel to the North of the motorway junction.

I suspect, the rail tunnels will be very deep under the airport, which will mean the following.

  1. They won’t disturb the existing airport.
  2. All the existing Crossrail design and construction expertise will be useful.
  3. The station could be as large as needed, with through and terminal platforms.

With its connections to Crossrail, it would also be West London’s high speed railway station.

HS4Air South Of Heathrow

South of Heathrow, the first map, shows that the Heathrow tunnel will emerge close to the M25, South of the major junction between the M25 and the M3.

This Google Map shows the area.

I will investigate where the Heathrow Tunnel emerges in HS4Air Between Heathrow And Gatwick Airports.

Conclusion

This section of HS4Air looks to be a railway that can be slotted through alongside the M25 with very little disturbance to existing traffic routes.

I doubt that few houses or other buildings will need to be demolished.

The two major junctions with HS2 and the Great Western Railway will cause little disruption during construction, as the former will be over a quarry and the second is by a sewage works, which could be moved if necessary.

This first section is so obvious, I am surprised it hasn’t been included with the building of HS2.

 

 

July 26, 2018 - Posted by | Travel | , , ,

1 Comment »

  1. […] said in HS4Air’s Connections To HS2, The Great Western Main Line And Heathrow, that it appears that HS4Air’s Heathrow Tunnel will emerge somewhere just South of where the […]

    Pingback by HS4Air Between Heathrow And Gatwick Airports « The Anonymous Widower | July 26, 2018 | Reply


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.