The Anonymous Widower

HS4Air Between Gatwick Airport And Ashford

This map clipped from the Expedition Engineering web site, shows the route of HS4Air between Gatwick Airport and Ashford International station.

The route reuses the existing railway between Ashford International and Edenbridge (Kent) stations.

From Gatwick Airport To Edenbridge

This Google Map shows the countryside between Gatwick and Edenbridge.

According to the first map, the Gatwick Tunnel emerges to the East of the M23 Motorway, which runs North-South down the left side of the map.

It probably emerges South of the Airport spur from the M23 and then it would travel on the surface to Edenbridge (Kent) station, which is in the North East corner of the map.

It looks to be a very challenging route, although there are several industrial sites scattered between the M23 and Lingfield, which is perhaps halfway between the motorway and Edenbridge.

This Google Map shows Edenbridge (Kent) station with the Redhill-Tonbridge Line passing through.

It would appear that the engineering could be reasonably attainable, but getting the natives on-side might not be so easy.

It’s not as though the residents between Edenbridge and Gatwick will get much benefit from HS4Air.

From Edenbridge To Ashford

This line has the following characteristics.

  • It is around forty miles long.
  • It is almost straight.
  • It is double track.
  • There are several stops.
  • There is a maximum speed of 100 mph

It doesn’t appear to have many more than about four trains per hour (tph) in both directions.

Very little has been said about how HS4Air will transform the line, except that it will be upgraded to a high speed line.

The only information of value is that Ashford to Gatwick will take 25 minutes.

How far would a train go in that time at various speeds?

  • 100 mph – 42 miles
  • 125 mph – 52 miles
  • 140 mph – 58 miles

As the route between Edenbridge and Gatwick is probably around a dozen miles, it would appear that a well-designed 125 mph route could enable the time quoted by HS4Air.

Local Stations On The High Speed Line

I’ll take Penshurst station as an example.

This Google Map shows the station.

Note that it is very simple with a platform on each line.

Currently, it gets a single tph in both directions.

HS4Air would probably mean that at least another four tph, passed through the station at 125 mph.

It could be argued that this could cause safety problems.

On the other hand, there are many stations in the UK, where local trains stop and expresses go through at 125 mph.

Platform-edge doors would be a difficult and expensive solution, but why not make access to the platform only possible, when a train is stopping?

Looking at Penshurst station, this station also needs some more facilities, like a fully accessible footbridge.

Conclusion

The Gatwick to Ashford section can be converted into a 125 mph route,  which would give a time of 25 minutes between the two stations.

However, I do think there will have to be a lot of political leverage to get it built.

July 27, 2018 - Posted by | Travel | , , ,

No comments yet.

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.