The DLR has a new map – with line colours on it!

A test ride at South Quay in July 1987. Image: Hulton Archive/Getty.

The Docklands Light Railway may well be worrying that its youth is behind it, and debating whether it’s time to leave London – for this month, the DLR turns 30.

The first passenger trains ran on the network ran on 31 August 1987, and at the time the system was much smaller than it is now: just two branches, from Island Gardens up to Stratford and Tower Gateway respectively. Even those lines had fewer stops than they have now: Pudding Mill Lane (1996), Langdon Park (2006) and, most important, Canary Wharf (1991) didn’t come until later.

Thirty years on, the network has tripled in size, in terms of both route length (from 13km up to 38km), and stations (from 15 to 45). Its tentacles now stretch to Bank and Lewisham, Woolwich and Beckton. There’s even a second route to Stratford, because you can never have too many. (That, at least, seems to be the core principle of London transport planning over the last few decades.)

All this has made for a more complex and confusing network than the 1987 version. So to celebrate the DLR’s birthday, Transport for London has produced a new map. Here you go:

You probably want to click to expand this. Image: TfL.

Two things about the map jump out at me. The smaller one is that hatched chunk of line at the very bottom, which shows that southbound trains from Bank to Lewisham skip West India Quay.

This has been happening for some time: a new section of track opened as part of network capacity upgrades completed in 2009 bypasses the station altogether. But most maps have tended to ignore the fact because, well, it’s difficult to illustrate and West India Quay is a five minute walk from both Poplar to Canary Wharf, so it doesn’t matter very much. This is – correct me if I’m wrong – the first network map that illustrates the bypass graphically, rather than with a footnote.

The bigger change is the introduction of line colours. I have very vague memories of this being a thing on some maps in the early 90s – Beckton was blue, Stratford was red and Bank was green, I think – but this is the first time it’s happened this century.

The line colours are helpful in communicating whether you can get a direct train between two specific stations. And while I instinctively dislike the way they’ve done it, the more I think about it, the more I suspect that the designers are a lot cleverer than me.

Look at all that lovely green. Image: TfL.

My instinct, you see, stems from my long-standing belief that the Northern line of the tube should be broken up into two separate lines, one running via Charing Cross and the other via Bank. Knowing which bit of central London your train is going to seems to me to be more important than knowing which suburb it ends up in.

The DLR designers took a different approach, colouring the lines based on which bit of suburbia they end up in to the south or east. That, in this case, actually makes more sense. Partly that’s because there isn’t really a DLR equivalent of the “oops, I wanted a Bank train” trap for tourists: the destination station alone should give you enough information, without any of that ‘via’ nonsense.


And partly it’s because the DLR doesn’t really serve central London: you’re more likely to want to know if your train will go to Canary Wharf, City Airport or Excel, three stations which are, helpfully, served by three different colours.

Or partly – I’m not ruling this out – I’m wrong about the northern line.

My only other complaint about this map is that the shades of green inescapably bring to mind three slightly different flavour mints.

Jonn Elledge is the editor of CityMetric. He is on Twitter as @jonnelledge and also has a Facebook page now for some reason. 

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Green roofs improve cities – so why don’t all buildings have them?

The green roof at the Kennedy Centre, Washington DC. Image: Getty.

Rooftops covered with grass, vegetable gardens and lush foliage are now a common sight in many cities around the world. More and more private companies and city authorities are investing in green roofs, drawn to their wide-ranging benefits which include savings on energy costs, mitigating the risk from floods, creating habitats for urban wildlife, tackling air pollution and urban heat and even producing food.

A recent report in the UK suggested that the green roof market there is expanding at a rate of 17 per cent each year. The world’s largest rooftop farm will open in Paris in 2020, superseding similar schemes in New York City and Chicago. Stuttgart, in Germany, is thought of as “the green roof capital of Europe”, while Singapore is even installing green roofs on buses.

These increasingly radical urban designs can help cities adapt to the monumental challenges they face, such as access to resources and a lack of green space due to development. But buy-in from city authorities, businesses and other institutions is crucial to ensuring their success – as is research investigating different options to suit the variety of rooftop spaces found in cities.

A growing trend

The UK is relatively new to developing green roofs, and governments and institutions are playing a major role in spreading the practice. London is home to much of the UK’s green roof market, mainly due to forward-thinking policies such as the 2008 London Plan, which paved the way to more than double the area of green roofs in the capital.

Although London has led the way, there are now “living labs” at the Universities of Sheffield and Salford which are helping to establish the precedent elsewhere. The IGNITION project – led by the Greater Manchester Combined Authority – involves the development of a living lab at the University of Salford, with the aim of uncovering ways to convince developers and investors to adopt green roofs.

Ongoing research is showcasing how green roofs can integrate with living walls and sustainable drainage systems on the ground, such as street trees, to better manage water and make the built environment more sustainable.

Research is also demonstrating the social value of green roofs. Doctors are increasingly prescribing time spent gardening outdoors for patients dealiong with anxiety and depression. And research has found that access to even the most basic green spaces can provide a better quality of life for dementia sufferers and help prevent obesity.

An edible roof at Fenway Park, stadium of the Boston Red Sox. Image: Michael Hardman/author provided.

In North America, green roofs have become mainstream, with a wide array of expansive, accessible and food-producing roofs installed in buildings. Again, city leaders and authorities have helped push the movement forward – only recently, San Francisco created a policy requiring new buildings to have green roofs. Toronto has policies dating from the 1990s, encouraging the development of urban farms on rooftops.

These countries also benefit from having newer buildings, which make it easier to install green roofs. Being able to store and distribute water right across the rooftop is crucial to maintaining the plants on any green roof – especially on “edible roofs” which farm fruit and vegetables. And it’s much easier to create this capacity in newer buildings, which can typically hold greater weight, than retro-fit old ones. Having a stronger roof also makes it easier to grow a greater variety of plants, since the soil can be deeper.


The new normal?

For green roofs to become the norm for new developments, there needs to be buy-in from public authorities and private actors. Those responsible for maintaining buildings may have to acquire new skills, such as landscaping, and in some cases volunteers may be needed to help out. Other considerations include installing drainage paths, meeting health and safety requirements and perhaps allowing access for the public, as well as planning restrictions and disruption from regular ativities in and around the buildings during installation.

To convince investors and developers that installing green roofs is worthwhile, economic arguments are still the most important. The term “natural capital” has been developed to explain the economic value of nature; for example, measuring the money saved by installing natural solutions to protect against flood damage, adapt to climate change or help people lead healthier and happier lives.

As the expertise about green roofs grows, official standards have been developed to ensure that they are designed, built and maintained properly, and function well. Improvements in the science and technology underpinning green roof development have also led to new variations on the concept.

For example, “blue roofs” increase the capacity of buildings to hold water over longer periods of time, rather than drain away quickly – crucial in times of heavier rainfall. There are also combinations of green roofs with solar panels, and “brown roofs” which are wilder in nature and maximise biodiversity.

If the trend continues, it could create new jobs and a more vibrant and sustainable local food economy – alongside many other benefits. There are still barriers to overcome, but the evidence so far indicates that green roofs have the potential to transform cities and help them function sustainably long into the future. The success stories need to be studied and replicated elsewhere, to make green, blue, brown and food-producing roofs the norm in cities around the world.

Michael Hardman, Senior Lecturer in Urban Geography, University of Salford and Nick Davies, Research Fellow, University of Salford.

This article is republished from The Conversation under a Creative Commons license. Read the original article.