# Which London Underground line is the fastest?

Winter is coming on the Metropolitan line. Quickly. Well, quite quickly. We're not really sure. Image: Ed Webster

The average London Underground user's need for speed is a phenomenon as remarkable as the notion of shoving steam trains underground in the first place. Dog-eat-dog capitalism in its truest form, the cavalier, arge-barge willingness of Tube users to do anything they can to arrive at their destination 0.45 seconds earlier is formidable.

But escalator jousting can only get you so far in this world. What you really need to know is which Tube line is the fastest.

This, one would imagine, would be a simple case of looking at TfL's official figures and forever remaining content that your dinner party knowledge is a cut above everyone else's. But TfL remains coy about the speed of its services. The official website gives a figure for the average speed on the London Underground – 20.5mph, or 33kph – but no more detail than that.

To make any serious estimation of the fastest Tube line, then, we must look to other sources.

There are two useful bits of information we do have – how long the tracks that comprise each line are, and how long it generally takes to do the whole thing in one go.

To take one of the simple, branch-free lines as an example, the Jubilee runs between Stanmore and Stratford, along a total 22.5 miles of track. If you log onto TfL's journey planner, shove it a short time into the future so it can't account for any live service disruptions, and go, it'll tell you that the journey takes 57 minutes.

TfL's not a liar: she keeps receipts. Image: TfL.

Do the maths, and that’ll tell you that (in theory) the Jubilee line’s overall average speed is 23.7mph.

In theory you can follow that line of inquiry for each line, accounting for the spurious branches of lines like the Central, Northern, Piccadilly, Circle, District and Metropolitan, and come up with a rough estimate for the average speed of the line based on how long it takes to get from one end to the other.

Helpfully, someone else by the name of Michael McHugh has done that before now, and came up with this bar chart to show the results.

Mmmmm, data. Image: Michael McHugh.

The Central line is allegedly fastest, the Victoria and Jubilee are second and third fastest, and the Circle languishes at the bottom of the table.

But it's hardly that illuminating. Some lines have stops closer together, and others have a habit of dithering in certain stations for a while along the way (think lots of District line trains in Earl's Court).

What we do have is some rather patchy indications of where on the network the tube goes especially fast.

The longest gap between two stations is on the north-western end of the Metropolitan line, where the gap between Chesham and Chalfont & Latimer is 3.9 miles. It’s on this part of the network that some of the Tube’s true lovers – its anorak admirers – have gone out and measured speeds with amateur GPS devices.

As the network is above ground at this point (as it is for approximately 60 per cent of the entire London Underground system, ironically), you get pretty good signal, so you can clock up the speed that the train is travelling at.

With the old A-stock trains (the ones recently retired when the shiny, walk-through S7/S8 trains were introduced on the Hammersmith & City, District, Circle and Metropolitan lines), speeds of around 70mph have been allegedly recorded in running service – the allegedly is important, though. None of this is official test conditions, and it’s mostly the handiwork of a bloke spending a Saturday afternoon as God intended.

The old A-stock train, here near Chorleywood station. Image: Antje.

Disclaimer having been said, that’s an impressive speed, and it’s likely that this is the fastest part of the network. When you’ve got 3.9miles of track to play with, you can bounce along quite merrily before you have to slow down for the next station.

What we don’t have that many of are figures for the new trains, the S7 and S8 stock. Being new and shiny, the assumption might be that these trains can go faster, but in reality the opposite is true. The S-stock may benefit from faster acceleration than the A-stock trains, at 2.9mph per second; but the top speed is 8mph down on the older models, down to 62mph.

Looking at the maximum speeds that the rolling stock themselves are capable of is a useful tool. The Victoria line’s 2009 stock is capable of 50mph, while the Jubilee line’s 1996 stock can do 62mph, like the new S-stock trains.

Acceleration, acceleration, acceleration - an alternative Blair slogan. Image: Matt Buck.

The Northern line’s 1995 stock is theoretically capable of 62mph too, as is the Central and Waterloo & City line’s 1992 stock, but in practice this isn’t the case. The Northern line is deliberately limited to 45mph in its underground sections due to the infrastructure of the tunnels, and on most lines you won’t get the chance to go that fast because the stations are too close together.

What really does matter, though, is acceleration – which is why many people assume that the Victoria line is the fastest. While its acceleration is nominally the same as the S7 and S8 stock, at 2.9mph per second, the Victoria line itself was built with hump-backed stations, meaning trains decelerate uphill into stations, storing gravitational potential energy, and accelerate downhill out of them, releasing it and increasing acceleration.

In safety terms, too, it’s in passengers interests for trains not to run that fast. The slower trains run, the closer they can safely run together, as stopping a reasonably slow-running train from crashing into the one in front should something go awry is easier than halting a 62mph, 1996 stock from bumping into the back of the next train on the line.

Essentially, if you’re seeking thrills on the Underground underground, hop on the Central or Jubilee lines in their central sections. If you’re a speed-chaser who doesn’t mind being above ground, catch a Metropolitan line out in the sticks of the artist formerly known as MiddlesexBuckinghamshire. If you’re a fan of acceleration, the Victoria line will give you a quiet thrill.

But if you just like getting from A to B as quickly as possible, the question of which London Underground line runs the fastest probably won’t actually help you that much. Wonkish questions about acceleration, service frequency and station design almost certainly will.

Happy riding.

Jack May is a regular contributor to CityMetric and tweets as @JackO_May.

# There isn’t a single national housing market – so we need multiple models of local regeneration, too

Rochdale. Image: Getty.

This week’s budget comes ten years after the 2007 financial crisis. The trigger for that crisis was a loss in confidence in mortgages for homes, with banks suddenly recognising the vulnerability of loans on their books.

In the last ten years, the UK’s cities and regions have followed very different paths. This week’s focus on housing affordability is welcome, but it will be a challenge for any chancellor in the coming decade to use national policy to help towns up and down the country. Local housing markets differ drastically. The new crop of city-region mayors are recognising this, as rents in parts of south Greater Manchester are on average double the rents in parts of the north of the city-region.

When it comes to buying a home, politicians are increasingly articulate about the consequences of inequity in our housing system. But we must recognise that, for 9m citizens who live in social rented homes, the prospects of improvements to properties, common areas and grounds are usually tied to wider projects to create new housing within existing estates – sometimes involving complete demolition and rebuilding.

While the Conservative governments of the 1980s shrank the scale of direct investment in building homes for social rent, the Labour governments from the late 1990s used a sustained period of growth in property prices to champion a new model: affordable housing was to be paid for by policies which required contributions to go to housing associations. Effectively, the funding for new affordable housing and refurbished social homes was part of the profit from market housing built next door, on the same turf; a large programme of government investment also brought millions of social rented homes up to a decent standard.

This cross-subsidy model was always flawed. Most fundamentally, it relies on rising property prices – which it is neither desirable nor realistic to expect. Building more social homes became dependent on ratcheting up prices and securing more private profit. In London, we are starting to see that model come apart at the seams.

The inevitable result has been that with long social housing waiting lists and rocketing market prices, new developments have too often ended up as segregated local communities, home to both the richest and the poorest. They may live side by side, but as the RSA concluded earlier this year, investment in the social infrastructure and community development to help neighbours integrate has too often been lacking. Several regeneration schemes that soldiered on through the downturn did so by building more private homes and fewer social rented homes than existed before, or by taking advantage of more generous legal definitions of what counts as ‘affordable housing’ – or both.

A rough guide to how house prices have changed since 2007: each hexagon is a constituency. You can explore the full version at ODI Leeds.

In most of England’s cities, the story does not appear to be heading for the dramatic crescendo high court showdowns that now haunt both developers and communities in the capital. In fact, for most social housing estates in most places outside London, national government should recognise that the whole story looks very different. As austerity measures have tightened budgets for providers of social housing, budgets to refurbish ageing homes are under pressure to do more with less. With an uncertain outlook for property prices, as well as ample brownfield and greenfield housing sites, estates in many northern towns are not a priority for private investors in property development.

In many towns and cities – across the North and the Midlands – the challenges of a poor quality built environment, a poor choice of homes in the local are, and entrenched deprivation remain serious. The recent reclassification of housing associations into the private sector doesn’t make investing in repairs and renewal more profitable. The bespoke ‘housing deals’ announced show that the government is willing to invest directly – but there is anxiety that devolution to combined authorities simply creates another organisation that needs to prioritise building new homes over the renewal of existing neighbourhoods.

In Rochdale, the RSA is working with local mutual housing society RBH to plan for physical, social and economic regeneration at the same time. Importantly, we are making the case – with input from the community of residents themselves – that significant investment in improving employment for residents might itself save the public purse enough money to pay for itself in the long-run.

Lots of services are already effective at helping people find work and start a job. But for those for whom job searching feels out of reach, we are learning from Rochdale Borough Council’s pioneering work that the journey to work can only come from trusting, personal relationships. We hear time and again about the demoralising effect of benefits sanctions and penalties. We are considering an alternative provision of welfare payments, as are other authorities in the UK. Importantly, residents are identifying clearly the particular new challenges created by new forms of modern employment and the type of work available locally: this is a town where JD Sports is hiring 1000 additional workers to fulfil Black Friday orders at its warehouse.

In neighbourhoods like Rochdale’s town centre, both national government and the new devolved city-region administration are considering an approach to neighbourhood change that works for both people and place together. Redevelopment of the built environment is recognised as just one aspect of improving people’s quality of life. Residents themselves will tell you quality jobs and community facilities are their priority. But without a wider range of housing choices and neighbourhood investment locally, success in supporting residents to achieve rising incomes will mean many residents are likely to leave places like Rochdale town centre altogether.

Meaningful change happen won’t happen without patience and trust: between agencies in the public sector, between tenants and landlords, and between citizens and the leaders of cities. This applies as much to our planning system as it does to our complex skills and employment system.

Trust builds slowly and erodes quickly. As with our other projects at the RSA, we are convinced that listening and engaging citizens will improve policy-making. Most of those involved in regeneration know this better than anyone. But at the national level we need to recognise that, just as the labour market and the housing market vary dramatically from place to place, there isn’t a single national story which represents how communities feel about local regeneration.

Jonathan Schifferes is interim Director, Public Services and Communities, at the Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA).