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Old September 29th, 2016, 06:21 AM   #1221
StuZealand
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Impressive! Will the Ceneri Base Tunnel also be controlled from here?
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Old September 29th, 2016, 10:32 AM   #1222
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Quote:
Originally Posted by Luganese1980 View Post
Bad news

The first passenger trains are set to pass through the Gotthard Base Tunnel on December 11 – but how fast will they be travelling? Greater wind resistance than expected is slowing them down and threatening to play havoc with the timetable.

Instead of the planned 200km/h (125mph), a physical phenomenon apparently overlooked by engineers means the trains running through the longest rail tunnel in the world will have a top speed of only 160-180km/h, according to a report in the NZZ am Sonntag.
The problem is air columns. Out in the open these air flows created by every moving body can easily escape sideways or upwards. In a tunnel there isn’t much room – especially in the 57km (35.5-mile) Gotthard, which for economic reasons was built almost 10% narrower than the Lötschberg Tunnel for example.

The air columns must therefore be moved along both one-way tunnels by the trains – which requires a lot of energy. “In this case the trains act like pistons in a bike pump,” an engineer told the NZZ am Sonntag.
The problem is exacerbated by slow goods trains which also use the tunnel but have a top speed of only 100km/h. These take 41 minutes to get through the tunnel compared with around 19 minutes for passenger trains.

In theory, the Gotthard timetable is a thing of logistical beauty. Most of the time five trains are travelling in each direction: two goods trains travelling quite close together, one passenger train and two more goods trains. The fast passenger train enters the tunnel just ahead of two goods trains, catches up with the two goods trains ahead of it and leaves the tunnel just behind them. This system, which has a 30-minute rhythm, fits perfectly into Switzerland’s scheduled timetable.

In practice, however, the four goods trains slow down the moving air packet by 100km/h – the difference between the trains’ speeds.
Based on non-representative test runs, engineers reckon 10%-20% will be knocked off the passenger trains’ top speed. More test runs, which will be technically representative, are set to begin on Monday.
If the slower times are confirmed, the timetable will have to be rewritten with fewer than 100 days until the first passengers climb aboard.

Swissinfo.ch
Japan's tunnels are quite narrow in diameter compared to your average European tunnel. They solved the problem of tunnel boom by having longer noses. As a by-product, you end up with gorgeous trains without stubby noses. Perhaps they can solve this problem with more sleek aerodynamic trains?
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Old September 29th, 2016, 11:16 AM   #1223
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all these problems could be denied by the Federal Department of the Environment, Transport, Energy and Communications (UVEK)
Quote:
Originally Posted by steple View Post

https://www.uvek.admin.ch/uvek/de/ho...m-sonntag.html


In english:

- Test runs showed that passenger trains can run at 200 km/h according to the timetable.

- Freight trains will run at 100 km/h. There is no restriction to 900 tons as claimed in the original article.

- Air flow conditions behave according to the engineered calculations. The tunnel cross-section was not reduced compared to initial plans, but was extended in the Lötschberg base tunnel LBT to allow car transporting shuttles.

- Testing results showed that any concerns were unfounded. The planned timetable in the GBT can be run reliably.
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Old October 3rd, 2016, 03:24 PM   #1224
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I doubt they would not think about putting in powerful ventilation system, which they need require in case of fire anyway.

System like that should be able to produce slight under-pressure and "wind" inside the tunnel.
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Old October 6th, 2016, 10:51 AM   #1225
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Quote:
Originally Posted by StuZealand View Post
Impressive! Will the Ceneri Base Tunnel also be controlled from here?
It will control all the line from Arth Goldau to Chiasso (both mountain and base rotues) and its branches (Locarno/Luino/Lugano-Vedeggio/the two border lines near Stabio).

There are 4 such centres managed by SBB, and one by BLS. These control nearly all the standard gauge network in Switzerland (some private lines and -IIRC- major SBB stations like Chiasso will continue to be operated separately, and maybe other border stations?). Some lines are still controlled locally, but will be connected to one of the centres soon. For instance, the Luino branch is not yet controlled by Pollegio, but has station masters in each of its stations.

Each SBB control center has extra rooms as a reserve, both in case of maintenance of a control room of the same building, and to replace other control centers. For example, if Lausanne control center caught a fire and is completely destroyed, all its employees can be moved to the other centres (Pollegio, Zürich Airport and Olten) waiting the restore of the unusable control center.
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Old October 6th, 2016, 11:15 PM   #1226
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Is the entire Rhaetische Bahn network also centrally controlled from one location?
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Old October 7th, 2016, 03:06 AM   #1227
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Yes, it's vital to have redundant control centres for something so important as controlling (most of) the rail network. If one was destroyed or out of commission and there was no back up centre can you imagine the chaos it would lead to?
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Old October 11th, 2016, 02:49 PM   #1228
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Why the longest train tunnel in the world is a double-edged sword

http://www.independent.co.uk/travel/...-a7221661.html
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Old October 11th, 2016, 06:54 PM   #1229
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Quote:
Originally Posted by Luganese1980 View Post
Why the longest train tunnel in the world is a double-edged sword

http://www.independent.co.uk/travel/...-a7221661.html
Mr Calder seems to forget that after the tunnel opening, there will still be IR trains on the old line. So no need to take the plane because you want to see the scenery.
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Old October 12th, 2016, 08:25 AM   #1230
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But it will cost you more, as you will lose the price advantages of yield-managed through tickets. I think that's what the author of the article meant. Also, two more train changes, going through stairs with your luggage, more possibilities to get delayed, etc
.

Envoyé de mon GT-I9505 en utilisant Tapatalk
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Old October 12th, 2016, 11:50 PM   #1231
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There aren't many "yield management" discount tickets for domestic trips in Switzerland, anyway (there are some other discounts however, if you live there and knows them). However, there are such discount tickets for international trips on EuroCity trains. But not on international RegioExpress trains, of which some link directly Milano and Erstfeld:

Erstfeld 14.30 - Milano Centrale 17.50
Erstfeld 15.30 - Milano Centrale 18.50
Erstfeld 16.30 - Milano Centrale 19.50

Milano Centrale 08.10 - Erstfeld 11.25
Milano Centrale 16.10 - Erstfeld 19.25
Milano Centrale 17.10 - Erstfeld 20.25

Next year there will be just these three pairs, but in the following years some more will follow (ideally every hour). In Erstfeld there are connections with InterRegios, so one can go from Milan to Zürich or Luzern-Basel via the old line changing just one time, and with cross platform interchange.

During tourist summer season there will also be a Zürich-Bellinzona, from where one can take an EC or RE to/from Milano.

The inconvenience of changing trains and the possible delays will remain, however.
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Old October 15th, 2016, 02:13 AM   #1232
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There has been very little fresh info coming from AlpTransit in the last few months.
  • Their last press release was back in June regarding a new person appointed to the board of directors.
  • The Ceneri Base Tunnel page still says "The final breakthrough to the north is planned for the beginning of 2016."
  • They've removed the graphic displaying progress on the CBT.
  • Some of the webcams are now pointless as they show views that aren't going to have any more construction or changes.
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Old November 25th, 2016, 09:31 PM   #1233
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Old November 29th, 2016, 01:26 PM   #1234
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2004 was 12 years ago. Is there an updated map?
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Old December 11th, 2016, 08:38 AM   #1235
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The GBT finally opens today to regular trains. Does anyone know at what time these trains will start going through?
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Old December 12th, 2016, 12:16 AM   #1236
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The first commercial passenger train was the 11.09 Zürich-Lugano InterCity on 6th September 2016.

Today, the first train of this timetable period was IC 856 Chiasso 5.15-Zürich 7.51, which was followed by EC 11 Zürich 6.09-Milano 9.35. The day started directly with the normal schedule, they didn't wait a special ceremony to mark the event although a much smaller event was organized in Lugano (mainly to mark the end of works there).

I took IC 856 northwards until Flüelen, then alighted there to take, 18 minutes later, EC 11 to go back south. On IC 856 SBB gave for free bottles of water, fruit juices and croissants to all passengers (the train was nearly empty, with some railfan and a few regular passengers). EC 11 on the other hand was quite full, with two coupled ETR 610 sets, one with authorities (including SBB management), one for regular passengers (again, mostly railfans and tourists who wanted to take the "first" train).

IC and EC trains do not stop in Flüelen, except three per direction.

A special train also did run, it was composed of a Re 460, two first class coaches, some freight wagons clearly chosen by sponsors, and a Re 420 at the back. This departed from Basel and ended in Lugano bringing simbolic presents (don't know exactly what), and loaded something back to Basel. Official speeches followed, including the smaller ceremony of the reopening of the funicular linking Lugano station with the city centre which was closed to allow full reconstruction of the station and mechanical equipment of the funicular. By the way, this is the most trafficked cable transport in Switzerland on an annual basis (sure, some ski lifts have higher loads on peak days, but much less most of the year). As EC 11 was a regular train, it then continued normally to Milano.

On the afternoon, a northbound freight train broke down inside the base tunnel, which caused delays to other trains. A northbound passenger train was diverted on the old line, others arrived with delays of up to 45 minutes or so.

Today push-pull sets formed of Re 460+Bt EC* started timetabled operation on some trains, a kind of vehicle which never operated regularly on the Gotthard before. The train diverted on the old line because of the broken down freight was one of this kind, so if there were trainspotters standing on the old line, they might have taken quite a rare photo. These push pull sets until now were used only on extra trains on peak days like Easter holidays, and mostly only from Zürich to Göschenen, not south of it.

*see here for some photos...

Code:
http://www.bahnREMOVETHISbilder.de/name/galerie/kategorie/Schweiz~Wagen~IC+Steuerwagen/digitalfotografie/192.html
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Old December 12th, 2016, 01:29 AM   #1237
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gorgeous trainset

https://en.wikipedia.org/wiki/New_Pendolino
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Old December 12th, 2016, 04:39 PM   #1238
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Thanks for that info. It appears that AlpTransit have removed the last two webcams that covered the GBT at Erstfeld.

I suppose now the tunnel is open for business they aren't really needed.

The four remaining webcams cover the Ceneri Base Tunnel, and only two of those views show progress in its construction.
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Old December 17th, 2016, 05:23 AM   #1239
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another pic

http://viatrolebus.com.br/2016/12/ja...ario-do-mundo/
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Old December 17th, 2016, 07:31 PM   #1240
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Quote:
Originally Posted by Coccodrillo View Post
Official speeches followed, including the smaller ceremony of the reopening of the funicular linking Lugano station with the city centre which was closed to allow full reconstruction of the station and mechanical equipment of the funicular. By the way, this is the most trafficked cable transport in Switzerland on an annual basis (sure, some ski lifts have higher loads on peak days, but much less most of the year).
Are you sure about that? I always thought that title belonged to the Polybahn in Zurich.
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