Video from the signal box at St Albans. All about railway signalling from the earliest days to the modern technology. The signal box is a registered charity supported entirely by voluntary contributions to preserve the Grade II listed signal box and provide community resource free to the public.
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funny, in Belgium and Germany blue levers act on the turnouts and black ones do the locking
Yes - funny thing colour coding - I recall the introduction of green/yellow (earth), brown (live), blue (neutral) for single phase domestic wiring in UK. It had been green (earth), red (live), black (neutral). Of course, in english, earth (as in soil, mud etc) is usually brown. Maybe the idea was to make fitting a plug a task for an expert and dangerous for the uninitiated.
what happens if you get a unballance in tablets? say theres only 2 tables in the northbound but 18 in the soundbound is there a way to empty a bunch of the tablets out and send them up with the next train to reballance the system? or just it just rely on most the time you tend to get as many trains going each way that they never really run out?
Good question! I'll check with members on the capacity of the Tyer Machines (No6) that we have. In practice though, I think it would be very unusual to have a large number of trains travelling one way with none returning - maybe a town emptying out for holidays (e.g. a wakes week) or a big day at the races. In these circumstances though, I think I have read that the tendency was to create a "very long train rather than have many short ones. Remember if (say) 20 tokens get to one end of the line that would mean that 20 engines, each with their rolling stock and crew, would all be at the end of the line. More plausible perhaps would be where single line working followed a circular route. This could give rise to many more trains in one direction than the opposite. I don't know of any but will see what folks might know and post here, Thanks for the enquiry - always interesting to look at edge cases!
Good evening, I would kindly like to know the meaning of the white band present on some levers. Thanks again for your availability and collaboration
White levers are spares - that is, unused in the current configuration of the lever frame, points and signals. However, in our restored signal box , we use lever 32 (painted white and originally unused) to operate a signal in our garden.
@@sigbox Thank you for the answer, but I meant the white band painted on some red levers (not on all red levers). Thanks again for your availability and collaboration
Luigi - apologies, I missed the intent of your question earlier, The four signal levers with a white band on are 'Section' or 'Starter' signals. When cleared they allow a train to go towards the next station or signal box. Before any of those signals can be cleared the 'Absolute Block System' requires the signaller at St Albans to get permission from the signaller at the next box using the block instruments. Once that signaller has given their permission, the signal is electrically unlocked so the St Albans signaller can then clear the signal. And thanks to John Webb for the details on the answer here, trust this clears it up.
Is there a term for the type of levers here, with that hand safety lock?
Information we have is that the 'Catch Handle' is the small handle that releases the catch holding the lever firmly at each end of its travel. An important difference to other lever frames is that the catch handle also works the interlocking rather than the main lever. Trust this helps and do let is know if you discover other terms out there.
@@sigbox Ooh, thank you, that does help. I've been trying to figure out how to succinctly identify these in print, maybe 'catch-handle lever' will work.
Module TS3 Regulation 3.4.1 states the the line or at a facing junction, the line for which the facing points are set is clear up to and including the clearing point and all points within the clearing points are set for the safety of the approching train. Where is the clearing point in this demonstration out of interest please?
The video is a demonstration of the lever frame and instruments designed for the general public. The precise clearing point (the point to which the line must be clear, in order to accept a train) would, it could be argued, depend on the rolling stock, motive power and track condition. That is, it could perhaps have changed with time and technology. For the purpose of the simulation I think it is safe to assume that Signal 2 would be used as the clearing point. (8.09 minutes in is where the signal numbers are given) Trust this helps. If there is more detail, it will be posted here.
I was that child my dad was a signal man, I used to turn the wheel for the gates and pull the levers.
In America these days, we use "Track and Time" we get verbal authority to travel on track X from mile post to mile post or station. Very interesting!
Extraordinary engineering devised by Victorian engineers. They all deserve medals!
Ahh the reassuring sound of Victoria technology working , clatter, crash , thump , and the a nice gong , you could be stone deaf working that box , and still get by . Most enjoyable, thank you .
Thanks for the comments and yes, as they say, nostalgia ain't what it used to be. Did they call it artificial intelligence? No. Is AI any smarter? Only as smart as the people using it is the history I think.
kuno tapi efisyen
Many thanks - and in Malay too! A first for us from across the world - so greetings from UK to you.. Translation of uno tapi efisyen - "old fashioned but efficient". How true. - I hope we got the translation right.
Great explanation. Thank you!
Glad you enjoyed it - and thanks for the comment.
I've just seen one of these in the Japanese film The Railway Man and was wondering how they worked. Thanks.
Thanks for letting us know about the film "the Railway Man". It is on Amazon Prime (free for subscribers) and for a small fee on Google Play Movies, You Tube and Apple TV. The film has good reviews and a summary and background on Wikipedia.
My mistake, it's called The Railroad Man (1999), although The Railway Man (2013) is also a good film.
Oh - thanks for letting us know. It seems to be called Poppoya and can be seen on You Tube at kzread.info/dash/bejne/oXtm3NuidtrWn7w.html and there is a summary on Wikipedia. Sounds great and a must watch! Thanks again.
Brilliant video love how signaling used to be 👍
Thanks for the kind words here - and glad you enjoyed the video - its why we do it - thanks again
Aww, this video is very adorable and sweet to listen to and watch.
many thanks - glad you enjoyed.
Thoroughly enjoyed this demo, in practice though 2-1 wouldn't be sent until the tail light had been seen on the train where there are sections without track circuiting. And of course not forgetting the entries in the train register!
Quite so, and many thanks for watching... always more we could do!
Good evening, some single track museum railways in the United Kingdom are still operated with staff or token blocks although all their stations are equipped not only with home signals but also with departure signals (generally "railway semaphore signals" with arms positioned at 45º in the dial lower or in the upper quadrant to communicate to the driver that the way is clear). It is therefore not clear to me the need to have a staff or token block in the presence of starting signals. In other words, the signals that authorize the sending of trains in the opposite direction along the single track section could not be interconnected with each other in order to avoid head-on collisions as well as pile-ups as happens on double-track lines equipped with "Absolute block" ? If I remember correctly, the intermediate railway stations of the lines operated with the "Radio Electronic Token Block" do not have departure signals, except the "Stop Board". Grateful for the attention given to me, I would like to take this opportunity to extend cordial and sincere regards
Hi - thanks or your question about why single line working uses tokens or staffs rather than just signals to control movements between blocks. A token or staff is used because it provides something physical that has to travel between the start and end of a route. The machine that issues a token is interlocked with the machine that will receive it. Until that token has been received no more tokens can be issued. The use of a physical object as part of the interlocking is safer than relying on information alone. Hope this helps - this is a big subject and my explanation is far from compete really!
Good evening, some single track museum railways in the United Kingdom are still operated with staff or token blocks although all their stations are equipped not only with home signals but also with departure signals (generally "railway semaphore signals" with arms positioned at 45º in the dial lower or in the upper quadrant to communicate to the driver that the way is clear). It is therefore not clear to me the need to have a staff or token block in the presence of starting signals. In other words, the signals that authorize the sending of trains in the opposite direction along the single track section could not be interconnected with each other in order to avoid head-on collisions as well as pile-ups as happens on double-track lines equipped with "Absolute block" ? If I remember correctly, the intermediate railway stations of the lines operated with the "Radio Electronic Token Block" do not have departure signals, except the "Stop Board". Grateful for the attention given to me, I would like to take this opportunity to extend cordial and sincere regards
That is correct, that is the method of operation for single line track circuit block, and tokenless block. But without track circuits, these system do not work. How do you know if the train is clear of the single line, without track circuits?
@@enochliu8316Good question, but in Italy, France and other countries there are still single track lines without track circuits. For example, here in Italy the lines are operated with the so-called "Single Manager" system, where circulation is based on telephone dispatches recorded between the agents (low-skilled, called underwriters) who attend the stations (known in Italian as "underwriters") and the "Single Manager" or between the "Train Manager" and the "Single Manager" in the case of a crossing or priority. In the "train" column of the service timetable, the locations where the train conductor is exempt from the so-called "countersignature" of the "Giunto" phonogram are indicated with a specific symbol. From these stations the train can depart without waiting for further formalities. Instead, if the appropriate symbol is not present in the "train" column of the service timetable, in order to order the train driver to depart, the train conductor must countersign the phonogram of the "Giunto" exchanged between the hirer and the Sole Manager. . This ensures that the route up to the next station where the countersignature of the "Joint" is expected is free. In any case, in the event of delays, the Sole Director can bind the departure of a train to the countersignature of the joint. In the event of a significant delay in one of the two crossing trains, the Sole Manager verbally transmits to the Train Conductor the text for completing the specific prescription to be drawn up on the appropriate form (Form M1, Crossing Movement Order). As you can read, neither in the stations nor along the single track sections between one station and another are there track circuits. The switches (points) are secured via FS type key switch stops whose keys are normally secured in a central lock whose "Control Key" (CC) is kept in a safe. Only the Sole Manager can authorize the removal of the Control Key from the safe. The sole manager communicates, via the same non-selective telephone circuit, also with the "Line Posts" which remotely close the level crossings via simple or double wire transmission (metal rope). In any case, even along single track lines, as well as along double track lines, operated under the "Telephone Block" regime, there are no track circuits between one station and another. The freedom from trains on the routes is based exclusively on the phonograms exchanged between station managers. These obsolete systems are being replaced by more modern systems, such as the CTC with the axle counting block for what concerns the single track lines or with the automatic block with coded currents for what concerns the double track lines operated up to now with the block. telephone or with the manual electric block (this also does not include track circuits between one station and another). The FS plans to activate the European system called ETCS Level 2 for the entire network in the long term.
Very good information but it did not show how hard it is to pull a mile of cable connected to the lever to lift the signal,, My father was a signalman Browney county durham, and I had a go impossible he just threw it into position OMG
Yes indeed - a mile of cable on a winter's morning - that some pull needed! By the time the Box closed in 1979 though, the mechanical distant signals had been replaced with colour light signals. By way of reminding the signaller that the lever did not need to be pulled so hard, the handle at the top of was shortened by half. You can see this on the No1 lever on the frame in this demonstration.
My Dad moved to Seaham station signal box with a level crossing and three tracks in 1974 until he retired 1982@@sigbox
Still got the rule book with the hand updated rules and other memorobillia
Very interesting, but as an engineer of systems that are also extremely safety critical, this is how you use it…not how it works. 0:04
Yes - Fair play - but we only got so many letters to get across the message in the video title - so really, "how it works" could be said to include the signaller as part of the system.
this is why you have stations in the middle of nowhere because the train can't leave the station untill the train ahead of you reach the next station.
hey, guess what, you left hong kong a signal box, that is not a box! it was built in a station and no one was allow to restore it :l anyways, nice to see the demonstration.
Thanks for your comments - interesting to hear of the Hong Kong history - thanks
@@sigbox btw, they don't put the levers on the ground, the lowest of the levers actually are parallel to your hip, unlike BR, your foot
Currently in IST on an AB course. Though it's the same as our simulators, it's so cool to see an actual AB box. Cannot wait to pass out and do this myself!
All best wishes to you Jack - steady hand, study hard!
Great stuff!
Thanks 👍
Really interesting, but may I ask how it proves that the line is clear on a double/four track line? By rail circuit or tablets?
Thank you for your question. Each of the four lines is separately controlled . Track circuits detected the presence of trains, and the signallers used the block instruments to communicate with each other to allow the train movements. The track circuits, the instruments and the levers themselves were all interlocked to prevent any train being signalled into an occupied block. Tablets were only used for single line working - we have a video on our channel @SIGBOX on how Tyer No 6 instruments were used to do this. I hope this helps but do please ask again if anything needs a better explanation. Have a good day and best wishes to Beijing
@@sigbox Thanks a lot, so each signal box connects with each other to reach the semi-automatic blocking between each signal boxes via track circuit which tests the location of trains. CR's semi-automatic blocking is between each station or junction. I really know little about these ancient rail blocking facilities and systems since CR (Concluding KCR/MTR, Hong Kong) had replaced most of which with electrical/computerized facilities and systems after 1975.
@@user-xi8fo6vv1c yes - in the 1970's with semiconductors, we could make very complex logic circuits and computers quite easily. These systems were very much cheaper and easier to maintain and modify. Electric colour lights were also much more reliable and easily operated over long distances. I was born in 1950, so can remember when the railways were all steam engines and mechanical signalling. I have been lucky to work with electronic technology as it has advanced - today it is remarkable how much design, production, distribution, use and maintenance is done with software running on electronic systems. Burning coal and making everything from steel could not have made the modern world..
This is very complicated! 😱
Really interesting to see how it works/worked in my home country, it's strange though that there's no "route locking" as such, as there is here in Germany, over here (in our mechanical signal boxes that is) the entire route (entry or exit) stays locked until the train has passed completely through, either to the platform or out onto the open line. Until this happens one can't actually move any points or derailers, and it's all locked by a green lever. Maybe it's due to the different models of signal box. On one hand it's safer that it stays locked, so that the points can't move under a moving train, however it does mean everything takes a little longer, especially when having trains cross in the station, as one train has to reach the platform before you can even start thinking about setting the route for the one from the opposite direction.
Alex - most interesting - thank you. I always tend to think that the main difference between UK and continental railways is that in the UK the routes arose from naked commercial interest and competition. This led to duplication of routes and the timetabling of express, suburban and freight services all in competition with each other, all on the same lines. On the continent, because distances are so much greater, speeds and procedures had to be much more standardised. Yes, local interests may have suffered, but the system was much more efficient on a continental scale. Trains ran at consistent speeds and rail workers could expect to operate to consistent rules. The same applies in North America I think.. Indeed, perhaps a US military trope puts it best - "In the UK you equip your soldiers, but in NATO we man the equipment." Perhaps it is the same with railways although today, we rightly refer to people not just men.
Mechanical interlocking between the levers will lock the route. When signals are cleared for a specific route, they will lock the levers that control the points through that route, preventing them from being moved. In more modern boxes in the UK, that interlocking is done electronically.
I needed to know why they don’t dig a tunnel and do an extension for the main line Train so that they can extend the unused abandoned underground stations. Why couldn’t they use the part D78 Stock train doors on the sides and also restructure the front face of the A60 and A62 stock and that includes the class 313, class 314 and class 315 remix and make them all together and also redesign them an overhead line and also make them into Five cars per units and also having three Disabled Toilets on those Five cars per units A60 and A62 stock trains and also convert the A60 and A62 stock trains into a Scania N112, Volvo TD102KF, Volvo B10M, Gardner 6LXB, Gardner 6LXC and Gardner 8LXB Diesel Engines and also put the Loud 7-Speed Voith Gearboxes even Loud 8-Speed Leyland Hydra cyclic Gearboxes in the A60 and A62 stock, class 313, class 314, and class 315 and also modernise the A60 and A62 stock and make it into an 11 car per unit so it could have fewer doors, more tables, computers and mobile phone chargers. A Stock Train and 8 Disabled Toilets on those A stock trains. why couldn’t we refurbish and modernise the waterloo and city line Triple-Track train tunnel and make it bigger and extend it to the bank station, making it into a Triple-Track Railway Line so those 4 European countries such as Germany, Italy, Poland And Sweden to convert the waterloo and city line Triple-Track Train tunnel into an High-Speed train? The Third Euro tunnel Triple-Track Train line to make it 11 times better for passengers so they could go from A to B. then put the modernised 11 car per unit A Stock and put them on a bigger modernised waterloo and city line Triple-Track train tunnel so it could go to bank station to those 4 European countries such as Germany, Italy, Poland And Sweden. The modernised refurbished 11 cars per unit A stock could be a High Speed The Third Triple-Track Euro Tunnel Train So it is promising and 37 times a lot more possible to do this kind of project that is OK for London Germany, Italy, Poland And Sweden. oh by the way, could they also tunnel the Triple-Track Railway Line so it will stop from Buckinghamshire, Hertfordshire and Essex so that the Passengers will go to Germany, Italy, Poland and Sweden and also extend the Triple-Track Railway Line from Bank to Buckinghamshire, Hertfordshire and Essex Stations so that more people from there could go to Germany, Italy, Poland And Sweden Easily. Why couldn't they extend the Piccadilly line and also build brand-new underground train stations so it could go even further right up to Clapton, Wood Street and also make another brand new tunnel train station in Chingford could they extend the DLR. All of the classes 150, 155, 154, 117, 114, 105, and 106, will be replaced by all of the Scania N112, Volvo TD102KF, Volvo B10M, Gardner 6LXB, Gardner 6LXC and Gardner 8LXB Diesel Five carriages three disabled toilets are air conditioning trains including Highams Park for extended roots which is the Piccadilly line and the DLR trains. Could you also convert all of the 1973 stock trains into an air-conditioned maximum speed 78 km/hours (48 MPH) re-refurbished and make it into a 8 cars per unit if that will be alright, and also extend all of the Piccadilly train stations to make more space for all of the extended 8 car per unit 1973 stock air condition trains and can you also build another Mayflower and Tornado Steam Locomotive Companies and they can order Every 17 Octagon and Hexagon shape LNER diagram unique small no.13 and unique minor no.11 Boilers from those Countries such as Greece, Italy, Poland, and Sweden, can they make Mayflower and Tornado Steam Locomotive speeds by up to 117MPH so you can try and test it on the Original Mainline so it will be much more safer for the Passengers to enjoy the 117MPH speed Limit only for HS2 and Channel Tunnel mainline services, if they needed 16 Carriages Per units can they use those class 55’s, class 44’s, class 40’s and class 43HST Diesel Locomotive’s right at the Back of those 18 Carriages Per Units so they can take over at the Back to let those Mayflower and Tornado Steam Locomotive’s have a rest for those interesting Journeys Please!!, oh can you make all of those Coal Boxes’s 16 Tonnes for all of the 117MPH Mayflower and Tornado Steam Locomotive’s so the Companies will Understand us PASSENGER’S!! so please make sure that the Builders can do as they are Told!! And please do something about these very important Professional ideas Please Prime Minister of England, the Prime Minister of Sweden, the Prime Minister of Germany, the Prime Minister of Italy, the Prime Minister of Poland and that Includes the Mayor of London.
The AI is coming on here (a bit, not a lot, but a bit) - the language is theoretically correct, but not meaningful - best to do Latin or ancient Greek first I think (although few will be able to read and less interpret for meaning) - English is a compound of many language roots and thus quite difficult to simulate I think,
This is NOT single Line working - this is the working of a single line. Two completely different modes of working.
Alan = good point (depending on your country of origin) and thanks for the comment - do tell more please.
This was so engrossing that I have let my brussel sprouts get far too overcooked!
Some of us, and so long as the sprout is well drained, warm and adequately buttered, are not quite sure a sprout can necessarily be overcooked. All this al dente vegetable craze maybe good for teething infants but is not necessarily suited to the leathery gums and pungent taste preferences of life's later years.. 🙂
I was wondering about this as I walked past the other day.. very informative!
Glad it was helpful!
really intresting video your efforts at this age is appreciate sirr in your voice so positiveness and how polietly you explained its great sirr thank you for making this video
and thank you RaVish for your kind comments - they are greatly appreciated.
Thank you.
In some boxes the blue is a king lever to put the box in auto working for for through running. For times when the box can be unmanned.
there is a child somewhere...that will see this video and will never be the same...many years ago...I was that child...thank you!
Not a child anymore, but I am enjoying the journey of getting hooked on a topic I had as a child never imagined to enjoy.
does the british...run trains in sections...1..2 or 3 sections of trains in the same block segments?
Dave - thanks for the question - I'm not a signaller, but I am pretty sure that we are always just have one train per block. I think the big difference between UK and continental railroads is that in UK all the blocks are small - few miles maximum, whereas on continental railroads there can be huge distances between signal boxes..
There are special circumstances when two trains can be signalled in to the same block - one train coming to the assistance of a broken down train, or when two trains need to be coupled together to make a bigger train for example - but the general rule is that only one train can be in a section.
thank you...as a railroaded from the u.s. the terminology varies ...on the functions...but the functions are still the same! easy to understand...thanks!
Interesting. In my country the dispatchers just are communicating through telephone. Dispatcher from station A calls the dispatcher in station B and asks them if station B can accept train X. If dispatcher in station B confirms the station can accept train X then both of them write it into a logbook. Then dispatcher at station A send the train on track. When the train arrives in station B the dispatcher at station B calls the dispatcher at station A informing them the train has arrived and the track is free now. This system is also used as backup at railways equipped with modern electronic equipment for cases when there is malfunction. And it works safely - last serious accident caused by miscommunication happen in 1991.
Yes - the signalmen are trustworthy and the system relies on trusted relationships. Interlocking systems are predicated on the idea that employees may be hostile, forgetful or incompetent. It is remarkable how simple life would be if people could just trust each other and that trust would always be returned. But if there is any risk, what can the system designer do but design out the risk.
Yes, you make a good point about simplicity. In the system you describe there is trust between the signallers, the drivers and the passengers. A trusted network. The Tyer machine and indeed all interlocking systems arise from a lack of trust somewhere. Not necessarily a lack of trust between the people doing the work, but more usually the people managing the service. Can they trust everyone not to make a mistake, to be forgetful, to be impulsive, to be destructive. If there is any risk, the system designer has no choice, how much risk will the people building the system tolerate? With unlimited funds, we can find unlimited risk. At some point there is compromise and a certain level risk is accepted. Thank you for your thoughts - most instructive on how trust can make life simple.
And people will often take shortcuts and cut corners. It's human nature.
@@sigbox to be fair trust and capacity are 2 different things lets take the fictitious bob the signalman bob would never have a bad intent to anyone even if you really grind him hell save his temper for when your at the pub and whilst on the job takes it verry serious at all times bob can be trusted to always do the right thing but bob is only human and one day bob despite all his trying will inevitably make a mistake even if only a small one anyone could make interlocking is desighned more to cure the mistakes we make rather than not being able to trust each other
Love the commentary!
Thanks Rod... A labour of love for sure!
Hello I'm a volunteer signalman in Australia. I noticed you pulled the red lever before changing the points understandably In compliance with the interlocking of the ground frame, however I understand that lever movement to be clearing a signal for a train before the points are changed which normally doesn't work. Is there a reason for this? I look forward to hearing from you.
Thanks for query not many visitors pick that up. The ground frame came from an avoiding line at Leicester Station and was used to control access from a small siding that normally contained a tamper. When the tamper was needed the green lever was pulled to notify the signalman that the frame was in use, it was out of his sight line. This released the red lever which was used to block the avoiding line so that the points could be moved with the black lever to allow the tamper out. I assume this was a local fix for an unusual problem. Tony Furse - Chairman
@@sigbox Thank you kindly, if ever you find yourself in south Australia come say hello at woodville signal box at the NRM Adelaide, Kind regards Reuben.
Good evening, some single track museum railways in the United Kingdom are still operated with staff or token blocks although all their stations are equipped not only with home signals but also with departure signals (generally "railway semaphore signals" with arms positioned at 45º in the dial lower or in the upper quadrant to communicate to the driver that the way is clear). It is therefore not clear to me the need to have a staff or token block in the presence of starting signals. In other words, the signals that authorize the sending of trains in the opposite direction along the single track section could not be interconnected with each other in order to avoid head-on collisions as well as pile-ups as happens on double-track lines equipped with "Absolute block" ? If I remember correctly, the intermediate railway stations of the lines operated with the "Radio Electronic Token Block" do not have departure signals, except the "Stop Board". Grateful for the attention given to me, I would like to take this opportunity to extend cordial and sincere regards
I wanted to know why don’t dig a tunnel and do an extension for the main line Train so they extend the new abandoned underground stations. Why couldn’t they use the part D78 Stock train doors on the sides and also restructure the front face of the A60 and A62 stock that includes the class 313, class 314 and class 315 remix and make them all together and also redesign them an overhead line and also make them into six cars per units and also having three Accessible Toilets on that six cars per units A60 and A62 stock trains and also convert the A60 and A62 stock trains into a Scania N112, Volvo TD102KF, Volvo B10M, Gardner 6LXC, Gardner 6LXB and Gardner 8LXB Diesel Engines and also put the Loud 7-Speed Voith Gearboxes even Loud 8-Speed Leyland Hydra cyclic Gearboxes in the A60 and A62 stock, class 313, class 314, and class 315 and also modernise the A60 and A62 stock and make it into an 11 car per unit so it could have fewer doors, more tables, computers and mobile phone chargers? A Stock Train and also having 8 DisaAccessiblelets on those A stock trains. why couldn’t we refurbish and modernise the waterloo and city line Triple-Track train tunnel and make it bigger and extend it to bank station, making it into a Triple-Track Railway Line so those 4 European countries such as Germany, Italy, Poland And Sweden to convert the waterloo and city line Triple-Track Train tunnel into a High-Speed train? The Third Euro tunnel Triple-Track Train line to make it 11 times better for passengers so they could go from A to B. then put the modernised 11 car per unit A Stock and put them on a bigger modernised waterloo and city line Triple-Track train tunnel so it could go to bank station to those 4 European countries such as Germany, Italy, Poland And Sweden. The modernised refurbished 11 cars per unit A stock could be a High Speed The Third Triple-Track Euro Tunnel Train So it is promising and 37 times a lot more possible to do this kind of project that is OK for London Germany, Italy, Poland And Sweden. Oh by the way, could they also tunnel the Triple-Track Railway Line so it will stop from Buckinghamshire, Hertfordshire and Essex so that the Passengers will go to Germany, Italy, Poland and Sweden and also extend the Triple-Track Railway Line from Bank to Buckinghamshire, Hertfordshire and Essex Stations so that more people from there could go to Germany, Italy, Poland And Sweden Easily. Why couldn't they extend the Piccadilly line and also build a brand-new underground train station so it could go even further right up to Clapton, Wood Street and also make another brand new tunnel train station in Chingford and could they extend the DLR? All of the classes 150, 155, 154, 117, 114, 105, and 106, will be replaced by all of the Scania N112, Volvo TD102KF, Volvo B10M, Gardner 6LXB, Gardner 6LXC and Gardner 8LXB Diesel Six carriages three accessible toilets are air conditioning trains including Highams Park for extended roots which is the Piccadilly line and the DLR trains. Could you also convert all of the 1973 stock trains into an air-conditioned maximum speed 78 km/hours (48 MPH) re-refurbished and make it into a 8 cars per unit if that will be alright, and also extend all of the Piccadilly train stations to create more space for all of the extended 8 car per unit 1973 stock air condition trains and can you also build another Mayflower and Tornado Steam Locomotive Companies and they can order Every 17 Octagon and Hexagon shape LNER diagram unique minor no.13 and unique small no.11 Boilers from those Countries such as Greece, Italy, Poland, and Sweden, can they make Mayflower and Tornado Steam Locomotive speeds by up to 117MPH so you can try and test it on the Original Mainline so it will be much more safer for the Passengers to enjoy the 117MPH speed Limit only for HS2 and Channel Tunnel mainline services, if they needed 16 Carriages Per units can they use those class 55’s, class 44’s, class 40’s and class 43HST Diesel Locomotive’s right at the Back of those 16 Carriages Per Units so they can take over at the Back to let those Mayflower and Tornado Steam Locomotive’s have a rest for those fascinating Journeys Please!!!!!! oh, can you make all of those Coal Boxes’ 16 Tonnes for all of the 117MPH Mayflower and Tornado Steam Locomotive’s so the Companies will Understand us, passengers!! so please make sure that the Builders can do as they are Told!! And please do something about these very important Professional ideas Please Prime Minister of England, Prime Minister of Sweden, Prime Minister of Germany, Prime Minister of Italy, Prime Minister of Poland and that Includes the Mayor of London.
Artificial intelligence with syntax dependant phrasing and noun selection could engender meaningful discourse if verb relevance were truly based only on heuristics. But is it? Only time and a larger training set will inform. Still, worth watching.
thank you very much, this is the most detailed intro I've ever seen!
Many thanks for your comments - much appreciated, we also have a video on single line working that you may find interesting.
Can we see a longer video of the box in action?
This is the longest we have, we are sorry to say. We can do more complex demonstrations and simulations, but we do these on member days and we haven't yet had time enough to make videos of them. Perhaps in time, yes, but it is a lot of volunteer effort. Thank you for your enquiry ad encouragement.
@@sigbox thank you!
I really hope that apparatus has been disconnected or God help us all.
Explanation rather biased to those in the know. The abbreviations rather mean that those who do not understand single track working will still be uninformed. They may be impressed by your knowledge of the system. You suffer from the phenomenon of explanations by operators, who learned on the job. They are describing their routine and not explaining the system. The actual system is amazingly safe and its derivative (RETB) still protects me as I travel on the Far North line day by day.
Note: (RETB) - stands for "Radio Electronic Token Block" - and as Jimmy says, it is derived from single line physical token systems, one of which is demonstrated in the video here. A full explanation from first principals of why the system is indeed fail safe and how the equipment implements the system model would always be good to have.
We still used this system in Thailand..
Thank you for your comment.. That is most interesting - do you have any pictures or video you could share? You can contact us through our web site www.sigbox.co.uk if you have files you can share . Thank you again
Yes, I have been watching a bunch of SRT videos as of recent, and came here looking for a good explanation in English on how this works.
This chap :)) has given a way basic explanation to this Tyler 6 or other existing protocols.
Can you please reupload the video without all the annoying tiny cuts? You don't need to jump the video forward if he stops talking for a moment.
Its a judgement call - the clips remove repeats, errors and stumbles not just pauses - some like them out, others don't mind. Takes a lot of editing time and skill to smooth them out and stress we are not a pro media company! Balance at the moment is to deliver the details correctly and as best we have them, but yes there is always room for improvement. Message received - can do better!
I watched Thomas & Friends and wondered what the signalmen were doing, and I had no idea about the interlocking until I watched this. If only you had token machines that were not using metal plates (not sure about carrying a lump of metal all day), then you could demonstrate those as well.
Did you see "Percy and the signal"? I rewatched it recently even though I'm an adult since i've been learning about semaphores
@@kinkisharyocoasters I haven't seen that episode, but I've seen a video pointing out little mistakes in it. GWR Studios is WAY overdue for a return.
@@ColtonRMagby the GWR actually had "backing signals"
@@kinkisharyocoasters "Backing signals" are probably for single line use only. I don't know.
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