How Much of the Tube is Actually Underground?

[@frankmimnagh420]

Hi Geoff, I worked at TfL in their tunnels engineering department from 2008 to 2020. We worked out that there was roughly 41% of the tube in tunnel (excluding cut an cover sections and measuring from tunnel portal to tunnel portal). So we are converging to a number around 40%.

[@rjjcms1]

Deepthought still thinks the answer is 42.

[@kevinshannon9917]

Thank you for this comment. I was hoping someone could answer this question. For this question, I don’t care as much about stations underground as I do track underground. Thanks for your expertise!

[@YinYangIes]

Bearing in mind the new extensions and whatnot of the tube I feel like that would be I little bit more

[@riorobins1311]

Tunnel Engineers are quite scarce aren’t they? I work in tunnelling and do a lot of work for Thames Water, they had a tunnel engineer who was sick and they were searching months for s replacement

[@VongChung-f1q]

Ufvlvulfvufp7tgp

[@radagastwiz]

Toronto has a great 'gray area' station, Old Mill, as it's built into the side of a hill. The west end of the platform is fully underground, but the east half is on an enclosed bridge over a river valley.

[@anniesoernym]

That sounds like a great looking place! I'll go and see if I can find some photos of it.

[@kenmills4739]

I never been to Toronto, BUT (and a big one too!), I have seen pictures and videos involving TTC's Old Mill station, it looks like a floating museum/art gallery, and I love it; as for the rest of the line (Bloor-Danforth/#2), it is in-and-out of the tunnel at various stations west of Dundas West station, yet a mistake is always made going eastward where on a street/road map the line is 'printed as' coming out of the tunnel after Sherbourne station [staying out] through Castle Frank station just to cross the bridge over the Don Valley area returning into the tunnel for Broadview through Main Street stations (the videos I've seen says otherwise: Castle Frank station is indeed underground); there is the Greenwood trainyard offroute, and the remaining outdoors from Victoria Park to Warden (original terminal until the 1980s extension to current underground Kennedy station). . .future plans call for routes #2 and #3 [Scarborough RT] to be put together as one route (#2's station is underground and #3's station is elevated until take-off time) while transfer privileges would be available further on for still under construction route #5 [Eglinton Crosstown]; I have a track map of the TTC and discovered a track connection between the infamous u-shaped #1 [Yonge/University/Spadina] and #4 [Sheppard]: I always imagined trains could 'alternate' between the two routes for the time being until future changes, while all along, the #1 could have been cut in half each way with Union RR station in it's middle as a terminal (saw a map of such a service that could have been)-fortunately I saw the original map of routes operated 'before' the Spadina extension came years later, yet the recently opened extension to Vaughn Metropolitan Center is completely underground which saddened me just slightly, but was enjoyable to watch, even with the layout of the infrastructure in another video that sowed the seed; surprised the Union-Pearson commuter rail wasn't operated by TTC, the rail line uses the same type of railcar as California's SMART commuter rail route (these acronyms o-mi-gosh) . . .SMART compensates for BART decades later thanks to the usual mathematics of politricks+ignorance+nimbyism=racism that stymies the living transit hell out of any transit expansion plans for the future because of the general unattractiveness that shame opportunities everywhere: "sh/st'eople [depreciation]", meanwhile transit fans continue to fantasize the latest umpteenth 'what if's' of how a transit system would/should/could look like.

[@freesmartdoesfungames9002]

Eglinton West is also another incredible example, as it is located in the centre along Allen Road and located below a road and a hill. The southern end of the station is clearly in tunnels, but once you get to the northern end, it gets very apparent that the station is not completely underground.

[@tkdbrother1977]

Old Mill Station was indeed my station when I lived in Toronto. There are some stations in TTC where a portion is below ground and the other is above ground but enclosed. I am thinking of High Park and Keele.

[@sengsrun2474]

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[@DenkyManner]

Tfl can't err on the side of 'you can see daylight' when it's about emergency vehicle access.

[@sadiqmohamed681]

I think the criteria for the Fire Brigade would have to be how to get fire hoses in. If you can get to track-side, even if it is in a cutting, instead of having to come down stairs then that station would be overground. So I think any station where you can see daylight from the platform would fit that. I would love to see the LFB version of the map, which would have all their access points to stations.

[@roach5219]

Fortunately the London Fire Brigade have issued an urgent statement to clarify that they don't intend to use Geoff Marshall's video for emergency planning purposes ;)

[@QemeH]

From the Fire Precautions Regulations, regarding the definition of sub-surface stations: "A railway platform is an underground platform if the level of the roof or ceiling immediately above the platform and the permanent way to which it is adjacent is below the level of the surface of the ground adjacent to any exit from the railway station providing a means of escape from the station in case of fire." So it's not about vehicular access, but about passenger egress. If you can get out without walking UP, you're not underground...

[@michaelleiper]

@@QemeH Which would be why the Fire Brigade map will include any station with any underground platforms (like the Piccadilly line at Earls Court), where Geoff is excluding the station because of the District Line platforms.

[@florian_aust]

6:45 "You may not disagree, but that is fine" - Geoff Marshall

[@pb4rton]

I used to work at Birmingham New Street station. For fire safety regulations this was classed as an underground station as most of the platforms are underneath a building. There are platform ends in the open, so it was classified as a sub-surface station. So I would guess that it would apply to the underground as well.

[@joermnyc]

So the dark gray on the map is all 15 stories below the street and the light gray is partially 15 stories down?

[@christophernoble6810]

The whole thing is a real mixture for historical reasons. In Hamburg and Berlin some sections of the Ubahn. are elevated and you get the oddity of the Ubahn being above ground and the Sbahn being underground at one station! Fascinating stuff Geoff.

[@norbitonflyer5625]

We have that in London too, at Whitechapel the Underground platforms are on the surface and the Overground platforms are in a tunnel underneath.

[@AltoClef]

Hey Geoff! Hope you don't mind but I've found a tiny mistake on your new map - apparently there's a rogue Stratford station on the lower part of the Northern Line :) Sorry - don't mean to be nitpicky; it's a brilliant map, and thanks so much for still making videos even while everything's shut down - it means a lot to us all :) Edit: I see it's been sorted out - thank you!

[@gillchatfield3231]

Intrigued by your name (not very usual on a train channel) I clicked and found your own. I'll be back!

[@juditharabe4118]

Where?

[@timjohnson689]

I love your dedication to exhaustively research all of this! There’s a good lesson on statistics in this - so much depends on how you define things.

[@welshgit]

I remember my first trip to London - a 2 week family holiday - I was 7. I was really excited by the underground, but felt completely cheated when the trains appeared out in the open.. Suddenly those great mystical tunnels felt more like a railway with a roof.

[@Ealsante]

Well it literally was how they were built in the early days! Deep a deep ditch, put the railway in, put the roof over it.

[@justanotheryoutubechannel]

I had an experience like this in reverse, I’d always been used to the tube being completely underground, but then I took a train that went outside and my mind was blown. It was such a fascinating experience to see something like that, I really had no idea they ever left the tunnels, and it made the tube so much more interesting to me. I also had a funny experience where our conventional train pulled up into a station, and a tube train came out of a tunnel into another platform further down the station, and it was such a bizarre thing to see.

[@martinnyberg9295]

Hey Geoff, here’s an idea for your next video in this series: for the lines on the tube map that run alongside each other (yellow, pink, green et.al.) what percentage of the length do they actually share tracks? That question is easier to answer for the underground that I ride most often, the one in Stockholm. The three colours on the Stockholm TuB-map (TuB för TunnelBana) are three independent systems, with their own depots, connected only at two places (on the bridge between Gamla Stan and Slussen, and between stations Fridhemsplan and Rådhuset). What’s it like in London?

[@rach_laze]

here are all the areas of the tube that share tracks, I don't have it in me to work out the percentage but basically all of the circle line is shared with either Hammersmith and City or Metropolitan lines Hammersmith (Met) - Near Aldgate [Circle Line / Hammersmith & City Line]. Just east of Baker Street - Near Aldgate [[Hammersmith & City / Metropolitan Line] Just east of Baker Street - Aldgate [[Circle Line / Metropolitan Line] Southern side Circle Line [Circle Line / District Line (main section)]. Western side Circle Line [Circle Line / District Line (Edgware Road - Wimbledon service)]. Harrow-On-The-Hill - Moor Park - Amersham [Chiltern Railways / Metropolitan Line]. Acton Town - Ealing Common [District Line / Piccadilly Line]. Rayners Lane - Uxbridge [Metropolitan Line / Piccadilly Line]. Queens Park - Harrow & Wealdstone [Bakerloo Line / Euston-Watford London Overground]. Aldgate East - Barking [District Line / Hammersmith & City Line]. Richmond - Gunnersbury [District Line / North London Line London Overground].

[@SkeledroMan]

The classification would be made clearer if you used platforms instead of stations

[@DAFPvnk]

yeah, because by his definition of "if the weather can touch it" means none of them are underground, they all have entrances above ground level - otherwise they would be pretty useless stations :P

[@kaitlyn__L]

Yes, I would be inclined to count the stations with just a handful of overground platforms to be, say, 25% overground or 50% or whatever the fraction of platforms, perhaps even incorporating a further fraction of those platforms that the weather still can't get to (the other side of the opening, basically, if the outside is immediately through one end of the tunnel). That way an entirely underground station is still 1 and an entirely overground station (like Leytonstone) is still 0. Of course, this method would give an answer that lies within the range Geoff said at the end.

[@adababalola3304]

GEOFF MARSHALL VIDEOS HOW MUCH OF THE TUBE IS ACTUALLY UNDRRGROUND

[@rjjcms1]

But there could also be one for total miles or kilometres of tunnel. Anyway,I like the idea of those maps by both TfL and Geoff that indicate where the tunnel parts are by the grey shading.

[@Leblribrbrrq]

Stations? Platform? The Underground is more than just the stations. I've expected an answer with the unit miles/kilometres. And then you can still argue about built-over and service tracks that are not used with passengers and all that …

[@OlePalnatokeAndersen]

Your exposure to weather metric is fine, but fails on a hypothetical overground station that has been encased in a shopping centre. You could also argue that cut-and-cover stations that are not covered, are really at least below ground level though not exactly underground.

[@lzh4950]

Reminds me in HK where quite a no. of stations' are located within shopping malls on 1 of their upper floors, so they feel more enclosed & like underground stations although they're elevated

[@lucsciousluca9702]

I used Hounslow West all the time before lockdown, it was strange because it seems underground, except u can see the outside on the east exit, and when heading eastbound you actually end up travelling above ground level in the way to Hounslow central and Hounslow East

[@photoisca7386]

Before the Piccadilly line was extended to Heathrow, Hounslow West was an open air station, it was also the terminus of the line. I remember watching aircraft going into the airport while waiting on the platform.

[@RalphHammett]

For your series ‘The Secrets Of The...’ You should do: -Secrets of The Brighton Volks Railway -Secrets Of The Blackpool Trams -Secrets Of MerseyRail -Secrets Of The Edinburgh Trams -Secrets Of The Manchester MetroLink

[@azeb2009]

Secrets of West Midlands metro

[@EElgar1857]

For a train nerd like me, this is excellent! I always enjoy your videos.

[@ib9rt]

It might be more precise to count individual stations on each line rather than treating an interchange with three lines as one station? After all, a strict definition of "station" is a place where trains are stationary allowing passengers to get on or off. Therefore Notting Hill Gate in your example would have both a Central Line station and a subsurface lines station with an interchange between them.

[@pfscpublic]

My auntie told me how the tube stopped at the end of tunnel during the WW2 Blitz and how she and her boyfriend would have to walk the last bit home to East Acton in the open, sheltering when enemy planes flew over. She said the AA fire shell cases would rain down in front of them sheltering in a porch

[@helentodd1829]

Hi Geoff, remember watching your attempt of all stations on ‘The Tube’ years ago! Glad I found your KZbin channel!

[@rohitdoestech]

Another great Geoff video. relaxing at home watching this on my tv..Hope your fine Geoff!

[@AverytheCubanAmerican]

Waterloo & City is underground, that's for sure! The Little line that could

[@highpath4776]

But the depot for it is open to air and you can see daylight from Waterloo Platforms

[@lucasbarton1773]

I love the Waterloo and city line! I use it every day, or used to *sad face*

[@BenCol]

Lucas Barton _Every_ day? But it doesn’t run on Sundays.

[@EwanMarshall]

Sort of, the whole depot is unique in being below street level though. There is a shaft in the depot for ventilation and lowering/raising trains (used to have an elevator on a siding but there was a major accident with that). The line is considered a deep level line as it is more than 20m underground and was not constructed using cut and cover.

[@lucasbarton1773]

BenCol oh yeah, sorry I meant weekday

[@michaelocyoung]

4:09 Yes I see a lot of grey areas there

[@dvdvnr]

As I child in the 1960s I remember standing on Hounslow West station many times when it was a terminus and before the Heathrow extension was built. Back then it was completely "overground" and exposed to the weather. So, Geoff, would it be worth making a video on all the stations that have changed from one type to another?

[@Tomsonic41]

Baker Street is interesting because although the Circle line platforms are fully underground now, that wasn't always the case. You've probably seen those lit-up ceiling recesses - these were originally wide open when the station was built, allowing daylight in and smoke out.

[@MagicaLucem]

Geoff is clearly a god. He is just unbelievably wise about the tube... So I was thinking ... shouldn't there be a statue of our Geoff on the tube system. . No brainer is it. ..yeah !!! The question must be... Where would you think on the tube network should the statue of Geoff be located? Sudbury Town ? Cockfosters? Then where...on a platform or in a forecourt or .. Terah.... above an entranceway ? So many questions... Can anyone help?

[@benjeffery1415]

Halfway down the fifteen storey steps at hampstead😂😂😂

[@stolenps4729]

Maybe ontop of Chiswick park?

[@darrenduffy1227]

Brixton

[@wintrwunderland]

Maybe they could’ve called it the Overground if that name wasn’t already taken.

[@ianwood2031]

Maybe the Wombling Network. Underground Overground. 🙂

[@highpath4776]

@@ianwood2031 That is , interestingly, Whitechapel. Where the Overground is Underground and the Underground is Overground. Wimbledon incidentally is Open to the Air, as is Wimbledon Park , Southfields Too, but the track then goes in a Tunnel to East Putney which is also within walking distance of Wimbledon Common.

[@creativejamieplays7185]

wood wombeling free.

[@JBS319]

In this case, I'd almost suggest going with a New York approach where each set of platforms is considered a station. For example, 161st St Yankee Stadium would for you count as one station, and it shows as one dot on the subway map. The 4 is above ground and the B and D are below ground, and the MTA considers these to be separate stations. Times Square is a 4 station complex, Grand Central is 3 (as is Atlantic Avenue and Broadway Junction, the latter of which is also a case of split above and below ground). The oddest case here is Wilson Avenue on the L, where the southbound platform is aboveground and the northbound platform is below ground. So Baker St would count as four separate stations, two of which are below ground and one of which is above ground.

[@highpath4776]

Baker Street has Eight? Platforms . Two Hammersmith&City/Circle, Two Jubillee and Four Metropolitan (two through to the H&C and two terminating.

[@JBS319]

@@highpath4776 but the two terminating platforms are in the same part of the station as the two thru platforms, so that could count as one station. the two H&C would count as one station, etc...

[@norbitonflyer5625]

@@highpath4776 Ten: you forgot the Bakerloo

[@michaelpilling9659]

That's the interesting thing about watching your videos Geoff. In every single one, you learn something new. Super film - loved it

[@mcollier4566]

So this video is actually "How many of the Tube stations are actually underground". "How much of the Tube is actually underground" is next week's video?! How hard would it be to calculate just how much of the running lines is in tunnels and how much of it is open to the weather?

[@alejandrayalanbowman367]

Or how about "How much of the Underground is actually Tube?"

[@darylcheshire1618]

might there be sections of line between stations that are above ground or in a cutting? Not stations I know.

[@jackiespeel6343]

@@darylcheshire1618 Would Finchley Road-Baker Street Metropolitan line be an example of what you are looking for?

[@TheRip72]

6:46 "You may not disagree & that's fine". That amused me. Regarding Aldgate. As well as part of the platforms being out in the open, it also has a station roof ... but the platforms are below ground level.

[@richardturnnidge]

By the title of the video, I thought you were going to measure linear length of lines which are underground/overground, therefore needing a proper map rather than the standard tube diagram. As well as the partially exposed stations and parts of track in zones 1/2, with longer overground sections outside zone 1, that might make the percentage 'underground' even less?

[@lewfinnis7795]

Regarding your comments about shopping centres built over stations, that hell-hole Birmingham New Street was classified as 'underground' when the regulations regarding smoking were changed following the Kings Cross fire, as so much of it is beneath the shopping centre above, though the platform ends are in the open.

[@OnkelJajusBahn]

The metro of Vienna has some very special caveat: Donauinsel station at the line U1 looks almost completely like an underground station. The only thing are two windows on the side. So there is no weather influence there whatsoever. But the station is actually lokated on the lower floor of a bridge crossing the river Danube. Here is Wikipedia article in German about it: de.wikipedia.org/wiki/U-Bahn-Station_Donauinsel Very interresting video. I also like those kind of calculations.

[@scythal]

My Viennese special other says this is true!

[@ryanrowe6097]

How much of the docklands light railway is actually over or near the docklands

[@ruairievans]

It uses a disused viaduct from Tower Gateway and the whole Docklands area was leveled during the blitz so there was lots of room to make it above ground

[@norbitonflyer5625]

Nearly all of it, except Bank, the two branches from Poplar and Canning Town to Stratford, and the sections south of the Thames. (All the London Docks were on the north bank except the Surrey Docks - the name is a clue! - which are served by Rotherhithe, Canada Water and Surrey Quays on the Overground.

[@holger_p]

Most lines or street names describe the destination, not the location. Imagine every railway in England would be called the English Line to fulfill your requirement.

[@flyingbananatree5661]

So where is the partial station (0.1%)? Extra-dimensional maybe.... I love the detail you`ve gone into here!

[@justsumting]

I was thinking the same and calculated the figures. The percentages are actually 61.5% and 38.5%.

[@jcrailwayvideos6588]

We now go to the weather with Geoff Marshall: (5:19) Look up, daylight, weather, in your face! 😎 Thank you Geoff. In other news...

[@tonywilson1845]

Geoff, I've just recently started watching your fantastically informative videos, especially the underground, purple trains and other 'oddities' like the £1.50 fare. I have mostly lived in Warrington and recently moved to Bristol so these areas are outside my railway experiences. I noticed in the what % of tube lines are overground, in the background it appears, that just like me, you have a large selection of OS maps (I think). Keep making these 'niche' videos.

[@Crepnick]

Fellow Warringtonian!

[@ste2442]

I’ve recently just finished working for network rail in Warrington at the slutchers lane depot

[@zanelindsay1267]

Interesting, but I was expecting to hear a percentage number based on track mileage rather than a station count. On the map at 3:14 I was puzzled to see a spur from the Jubilee line going to Charing Cross but apparently that's not normally used now.

[@sintsmeding2371]

Hi Geoff, have you listened to the latest podcast of Well There's Your Problem about the 1987 Kings Cross Fire? What are your thoughts on this event and about their view on this tragic event?

[@kliximBRUH]

3:11 why does it show the jubilee line to charing cross?

[@anaroong]

Before 19 Nov 1999, Jubilee Line also terminates at Charing Cross platforms 3&4 when it was still the Fleet Line. Then comes the 1999 Millenium Extension which sees a new section going to Stratford as it is, the new line splits at Green Park due to changes in land use past Charing Cross and therefore Charing Cross Fleet Line platforms had to be closed . Charing Cross platforms 3&4 are still being regularly maintained and is used as a film set from time to time.

[@davegreenlaw5654]

We have a couple of stations that are like that, in a grey area. One, Old Mill on the Bloor-Danforth Line (Line 2), the western end is underground, and continues west in tunnels. However, the eastern end, about half of the station, is open, has large windows, and is actually elevated as you head east over the Humber River. Another one much like that is Eglinton West Station on the Yonge-University-Spadina Line (Line 1). Running north, it is underground at the southern end of the station, but the northern end, as the subway starts its run up the middle of the Allen Expressway, is full of daylight from the many windows.

[@ReaperUnreal]

I decided to do the same thing for the Toronto subway. There's equally some interesting grey areas. Consider Old Mill station that is well above ground on the east side, but in a tunnel on the west side, but is entirely covered. Or Keele station which is entirely covered but well above ground. However there's a section between Royal York and Islington that's above ground track, but both stations are underground. This was fun, thanks for the idea!

[@OntarioTrafficMan]

Yeah Old Mill is the classic example. From street level you go downstairs, and then the platform is on a bridge over the Humber River! Keele is odd too, I doubt most people would know that it's actually elevated, since the station is so dark.

[@fredrickfraser1659]

Really the best way to answer this question would be to go to Google Earth, map out which sections of the tube are underground and which are exposed, and then to figure out from that what percent of the Tube is underground.

[@srfurley]

Is the Section 12 map available to the public anywhere? Hounslow West usef to be on the surface but was moved underground when the line was extended. Eastern end of the Central is odd; comes to the surface at Stratford but then goes underground to pass below the main lines and the new part of the Hainalt loop is underground. I think you would probably get a different percentage if you considered kilometres of route, or track, rather than number of stations. The open air sections tend to be on the outskirts, or at least outside the cee ntral area, where the stations tend to be further apart, so the open area percentage would probably be higher than by counting stations.

[@ClarinoI]

As I said in the previous video, you should forget about the stations, and concentrate on the lines. That'll give you a much better idea, and you won't have the issue of trying to figure out if something is underground or not because some platforms at a given station are exposed to the weather but others are deep level.

[@michaelleiper]

You've got Stepney Green station (which I believe you once called a "pain in the bum") as underground. But on the Eastbound platform, near the exit, there's a bit where you can look out and see the sky

[@marchionybros1920]

Civic Center MARTA Station in Atlanta might be one of the strangest edge-cases. While its under the road, it's actually an elevated station above a highway. Both the roadway and station are built as a bridge over the highway.

[@sambarton5963]

What would you say about Whitechapel, where the District/H+C is overground and the Overground is very much underground?

[@montyirish206]

There is a section at Victoria station on the district/circle line platform where there is daylight and weather. It’s nearly at the end of the platform. If you look up, you can see a big skyscraper.

[@highpath4776]

I think its the Car Park next to Victoria Coach Station ? (cant be thats a bit too far away), ! Platforms 16-20 Victoria main line are under an office development ?

[@Red_wine]

Was one of the people who asked this, glad to see a video on it :)

[@p4gash]

THAT WE ME

[@thatacerzedguy]

It's taken me 3 years to realise this... I just went to Victoria station today and I found an opening on the Circle and District line. If you go to the westbound platform and go left, you can see daylight. I don't know how I've never realised this, but its better now than never.

[@matthewteller6095]

What about Blackfriars? At the eastern end of the sub surface lines platform there is a short section of open air definitely big enough for the weather to come in. Co-ordinates: 51.511763, -0.103183

[@driverone7857]

2:27 When I went to London to see the Science Museum, I took the Circle line from Blackfriars to South Kensington. The direction I was sitting meant I thought Sloane Square was a fully underground station/cut and cover tunnel station

[@JamesTheBell1]

06:47: "You may not disagree" Sir, yes, sir!

[@SK_3PT1]

were not in the military u kno but oki

[@Rodhern]

"But that is fine."

[@DanceswithDustBunnies]

Bravo! Someone who actually knows the difference between may and might. Although I think Geoff really meant to say "agree" rather than "disagree".

[@boofalah36]

You mentioned Mill Hill East as above ground, but are there any elevated stations where you have to climb stairs or a ramp to get from the street to the trains? I can't think of any in London, although obviously common in urban rail networks elsewhere in the world.

[@norbitonflyer5625]

Plenty - most of those on the West Ruislip branch of the Central Line for a start - Greenford was, for many years, the only station on the Underground with an escalator to take you up from street level to the platform. Other examples include Stratford (Central Line), stations from Chiswick Park to Ravenscourt Park on the District, Wood Lane, Shepherds Bush Market, Goldhawk Road, East Finchley, East Putney, Putney Bridge...…...

[@boofalah36]

@@norbitonflyer5625 thank you. I haven't lived in London for a few years. I'd completely blanked out the western end of the Hammersmith and City Line. That surprises me, as I went to primary school a stone's throw from Ladbroke Grove station!

[@BulletNoseBetty]

In Toronto, the east-west Bloor Danforth line is both underground and overground. What's really fun is when it goes over the Don River. You're underground and all of a sudden you're high up in the air and then back underground!

[@temporalcomet]

Amazing work, and Bow Road is a very interesting one - never thought about that! Quick question - where we live in E1, all stations/lines are underground *except* Whitechapel (apart from the Overground, ironically) - any idea why this cut and cover line emerges above ground just for Whitechapel? Would be great to find out! Oh, and Aldgate is weird too! Right next to Aldgate East (not in the open) but Aldgate is above ground as you say!

[@highpath4776]

Because the old East London Railway ran from the Liverpool Street Platforms - Shorditch High Street(the old station) then Whitechapel , where the met/district lines had chords that connected with it , it then had to get underground to get under the thames using Brunel's existing tunnels. the gradient would be too wrong from shoreditch high street to pass under the district lines .

[@norbitonflyer5625]

@@highpath4776 The East London Railway was there first. The Met/District were then extended to a junction with it just south of the present Whitechapel station. This was, of course, built at the same level as the ELL. Only later was the "Whitechapel & Bow" line built, and this had to branch off the existing line from Aldgate, and rise over the East London Line in order to carry on towards Bow. You can still see where what is now the main line veers left approaching Whitechapel as the original line (now closed) goes straight on.

[@caw25sha]

I always thought the underground/overground percentages referred to track miles rather than stations.

[@PhilSergeant88]

Hi Geoff, you’ve missed a bit on your map. If going westbound on the district line, there’s a tiny underground section between Upney and Barking where it crosses underneath the c2c track, so there’s then a cross-platform interchange for passengers at Barking between westbound c2c and westbound District and also Hammersmith starters. The tube then crosses c2c over a bridge shortly after leaving Barking. which then of course means no cross-platform interchange at West Ham. Heading eastbound towards Upminster it remains overground all the way.

[@ailaG]

Interesting. Maybe do one on how many kilometers of track are underground or overground too? The under-over ratio is bound to be small, I wonder jow small. They're building an underground train system over at my area / metropoline (different country) and people keep claiming that it's not an underground train system that they're building because most of it is above ground. Now I have some numbers to show them.

[@Sim0nTrains]

That Fire precaution regulations map, is that not the Secret Tube map that only for employees or is that a different map all together? but it was very interesting indeed.

[@DaReS297]

It's actually quite fascinating how we define 'station'. I see you (and myself to a degree) consider a station to be a hub, and each line has their own platforms at a certain level of that station, which makes sense in the context of the Tube. For comparison, in New York, a station in many cases refers to just one or two lines, and we consider stations to be connected underground into a multi-station hub or station complex. This mostly stems from the fact that stations are named after streets, and intersecting lines are therefore named after different streets (and have different 'stations'), even though they are actually in the same spot.

[@norbitonflyer5625]

We also get this (see Edgware Road, Hammersmith), and had it more in the past when different companies had stations next door to each other, which have since been connected - see Notting Hill Gate, Highbury & Islington. Kings Cross - St Pancras is two main line stations served by the same Tube station. Paddington is the other way round.

[@SaturnCanuck]

Very cool. In Toronto much is underground, but, like London, in the suburbs the trains run overground. Yet, some stations -- such as Victoria Park and Warden -- while the track is above ground the stations are covered -- full buildings but open at either end.

[@rosiefay7283]

3:26 Strange that this map includes the Jubilee Line spur from Green Park to Charing Cross even though the Charing Cross terminus closed in 1999.

[@norbitonflyer5625]

It is for the emergency services, who need to know where all the lines and platforms are, even if they are not in regular use. It also shows, for example, Hammersmith and Lillie Bridge depots and Kilburn High Road station (occasionally used by empty trains ending/starting journeys at Queens Park when the tunnel section is closed)

[@arthurvasey]

Edgware Road on the Circle Line is exposed to the elements! There’s also one of the lines at Paddington in the open air - and Finsbury Park as you approach King’s Cross - and a stretch of the West Country line from Paddington!

[@malcolmgoodwin2135]

What if you do a mass count of station/lines being totally underground, partially under ground, and totally over ground, so that eg Baker Street would have several station/line counts grabbed as totally under ground to totally over ground. Partial could be graded into less than 30 percent exposed etc.

[@marsgal42]

My first thought on borderline stations was Earl's Court. The Piccadilly Line platforms are definitely underground but the District Line platforms are at cut and cover level under a large roof.

[@gregbruce1253]

Geoff I think you can put it into 3 basic categories, 1= all of the platforms are underground, 2= all platforms are above ground, 3= a mixture of underground and above ground. Just to add I also think if a station is built by the cut and cover method its underground.

[@vananderson2895]

I'm wondering if a better metric might be line-stations, so Baker Street would count as four underground and one overground line-station. Splits could count for half, and that would give you a much more salient percentage reflecting the platforms people actually use.

[@howdyhamster]

I'm from the Dallas area and it's easy to work out how many DART stations are underground: One. Cityplace/Uptown. SMU/Mockingbird is below ground level, but counts as open-air following your weather rule. An interesting bit of trivia: there's a ghost station between the two named Knox-Henderson. It was excavated, but never completed, which is why passengers' ears pop while riding through that part of the tunnel.

[@kamikazegargoyle]

Here's a couple of anecdotes from Tokyo's metro systems: the Toei and Tokyo Metro lines are almost completely underground, but there are a few exceptions. Unlike London they tend to come out of tunnels near the end of the line and then join onto other railway lines (often with through-service but you'll be charged separately for tickets as there's no zone system). So there's a few stations that are overground near the end of the line but the rest of the line is mostly/completely underground. For example Shibuya's Ginza line platform is actually the highest in the whole station complex. The Ginza and Marunouchi lines are the equivalent of London's cut-n-cover lines, not so far underground, so the Marunouchi line comes out of the tunnels a few times - there's a famous picture of Ochanomizu bridge with the Marunouchi line coming out and straight back into a tunnel to go over a river. Yotsuya station on the Marunouchi line is also mostly overground, and the Korakuen Marunouchi line station near Tokyo Dome is also completely overground. On the other hand, the newer Toei Oedo line is completely underground from start to finish. By some accounts that might make it one of the longest tunnels in the world at something like 40 km. (There are quite a few longer completely underground metro lines in China and other places but it's pretty cool all the same. I'm not 100% sure it really counts as one tunnel though if you have stations on the line)

[@Septimus_ii]

What about passenger numbers? How many passenger journeys are entirely overground, underground or go from one to the other? Or if those figures aren't available, how many entries and exits are overground vs underground

[@Mission-Study-Official]

Hi Geoff! Just some suggestions... Are you going to add the Elizabeth line to the map? Also, the London Overground would be an interesting one - how much of it is actually underground?

[@Rog5446]

I noticed on Geoff's map that he had a short section of the Met (Hammersmith & City) between Westbourne Park and Royal Oak as underground. I scratched my head on this one, but then remembered that there is an underpass, that gets the Met from the south side of GWR's lines to the Met's Padding station, which is on the north side of GWR's lines. So does a short dip under and up the other side really count as underground?

[@metropod]

There was something just the other day, actually. Pelham Parkway station on the #5 train here in New York does not have the WiFi system the other stations that are below ground have here. It’s in an isolated “enclosed” section, no stations in tunnels nearby. (This section, the Dyre Avenue Line, was once a mainline rail route the city bought and converted for subway use) Someone asked New York City Transit about that Station the other on Twitter and they came back with an answer of “its not underground, it’s in an open cut that got roofed over, we don’t think it’s underground and didn’t count it as such”. Make of that what you will.

[@michaelhaywood8262]

I remember from when I was a child travelling from Barking or Elm Park to Central London, the District Line surfaced at Whitechapel, before disappearing underground. You could also see what proportion of the Underground is underground by mileage rather than number of stations, the answer may be different.

[@catriona3279]

How many copies of the current tube map do you have, Geoff?

[@Sean-D78]

He probably has a lot of them to replace toilet paper.

[@thewoolwichbusguy]

@@Sean-D78 😂Real true

[@markstramtrainbuscapades1729]

I've always felt that the Metropoloitan Line platforms at Baker Street have the feel of a main line terminus, which, of course, is as the Meropolitan Railway sort of intended it!

[@rixster98]

What about stations like Edgware and Kingsbury that are street level entrances but then go below street level to the platforms with some open ends?

[@brian9731]

And then you get places like Farringdon and Baker Street which has some "above" ground track next to them but the track is predominantly sub-surface "under" ground. Or the little bit of the Met line which does not have a station but did have many years ago just across the road from Lord's.

[@ChrisH-1952]

Another interesting video. I'm wondering why Morden isn't 'above ground' on your map, Geoff. It is on TfL's. I've only been there once, but I thought it was daylight I saw when I got off the train.

[@marktickner7160]

“Eat Putney”... what’s Putney ever done to you? 🤣😂

[@ekvedrek]

Eat Chutney

[@billyb3689]

@Geoff why did you not define it as under ground, as in soil rock etc, rather than under stuff, like shopping centres canopys etc? Just a thought

[@johnstilljohn3181]

Here's my test - if you can see rails on Google Earth, the stations not underground...!

[@transportflick923]

John Still John what about Bermondsey where you can see daylight from the underground platforms?

[@johnstilljohn3181]

@@transportflick923 Ah yes - but look on Google Earth...!

[@RealConstructor]

If you dig a hole in the ground, is the hole underground or on ground or overground ? Or is it only underground if you bury it with ground? I would say underground is if you dig a hole, if it’s buried with ground or not. So below surface level is underground in my opinion, if you can see daylight or not.

[@mcwulf25]

Love the way you used the font at the end. Nice touch.

[@car_tar3882]

What is the furthest out underground underground station? Here in the dc area more specifically the northern suburbs in Maryland the last three stations of the red line are underground because people didn’t want the demolition of 25 buildings which seems quite unusual. They also happen to be the closest to a London station with one tube per direction instead of the station being one huge area like the other stations.

[@railrunners]

Pretty sure you can see daylight at Victoria on the sub surface platform if you stand in the right place... because I was there when it rained once Victoria or cannon street, not sure which

[@theurchin65]

It's been many years since I was last there, but I'm pretty sure that on the west bound platform of the Central Line at Mile End, there are some shafts of light coming down from the sky above. From memory, it is only a very small section of the track (about the middle).

[@RS-pb2se]

Nah, Mile End is fully underground.

[@roach5219]

4:08 "There are some grey areas" Most of the map is a grey area Geoff :D

[@1258-Eckhart]

Far more important to know if it's underground for evacuation purposes than if a drop of rain falls on 2% of the platform area. I'm with TfL here and would err if in any direction then even more towards the "covered is effectively enclosed" argument (--> 50%).

[@broadway254]

Forgot to say also. Should TFL decide to go ahead with the Bakerloo Line extension, that will add to more percentage, along with the Northern Line extension to Battersea Power Station.

[@BornToPun7541]

A good "gray area" station in the US can be found in the Washington DC Metrorail system. That station is called Fort Totten and it serves Washington's Red, Green and Yellow Lines. Part of the station is in an open cut, while the remainder is, for all intents and purposes, underground.

[@ianwood2031]

So if I look at Paddington, Hammersmith and City is overground, Bakerloo is underground, and Circle and Disrict is sort of both. Maybe this should be redone with each line at each station?

[@TomRyanElliott]

Another great video. The hell of us all being stuck inside. You'll soon find yourself creating a similar replica TFL map on one of the computer games 😅

[@theo1881]

Should there be dark shading of Piccadilly at Hammersmith/Earls Court? You have it between Stratford and Leyton

[@yosolo5797]

So what about if you counted a station multiple times if it has multiple lines running through it, remembering to note whether each is above or below ground, then rack up a total for the entire tube network and work out a percentage from that? It won't be a station percentage, obviously, rather it would be a platform percentage!

[@harshilpatel684]

Isnt there a bike map which states that you cant take your bike in a tube train where it travels under a tunnel during rush hour (or is it at all). I know the stretch between Colindale to Hendon Central has a tunnel which means you cant take a bike between Edgware and Brent Cross.

[@toddhunter3137]

The victoria line is completely underground from end to end. A mate in London once told me the London underground is 55 percent above ground and 45 percent underground, however this about 20 years ago, so allowing for expansions and extensions plus alterations etc.. What Geoff is saying sounds about right to me. I love watching your videos Geoff, it's clear that you are passionate about the subject of transport! 😉 😉 😉

[@norbitonflyer5625]

There haven't been any extensions or alterations since the Jubilee Line extension opened twenty years ago.

[@toddhunter3137]

@@norbitonflyer5625 I hear the Northern line is expanding to Battersea with a underground branch line.

[@toddhunter3137]

I wasn't aware this hadn't opened yet..🐢 🐢 🐢 I live in Manchester and we get a fraction of what you get for infrastructure down south.. Ok we got a new tram line built to the Trafford Centre but pond life will benefit from that! What they spend in Manchester is F All compared to London and the South East.

[@mrzon9344]

could do it by line and station? so if a station serves 3 lines then it counts for 3 and you can count 1 for the surface line and 2 for the underground? is there a breakdow per km of line? interesting to see the difference.

[@ianmcclavin]

Moorgate Met/H&C/Circle Line platforms are 100% underground now but were originally partially in the open at the eastern end (a bit like Barbican). They built a multi -storey office block on top, a bit like Mansion House later on, but that still had open-air sections of platform. Also I remember Blackfriats Districr/Circle platforms having open air sections before they were reconstructed (in the 70's, not the more recent rennovations). Anotheri interesting one is Bermondsey Jubilee Line platforms, definitely underground I would agree (and the weather can't get in) but you can definitely see daylight from the platforms if you stand under the skylights at the eastern end near the entrance/exit!