Who should decide how drones operate in cities?

A drone over Lille. Image: Getty.

Amazon recently filed a patent for a new technique involving parachutes and magnets to deliver parcels via drone safely to customers’ back gardens.

This came hot on the heels of 300 drones dancing over Lady Gaga’s Super Bowl performance only to be upstaged by a 1,000-drone light show in Guangzhou a few days later. Meanwhile, Japanese scientists have created drones that can pollinate flowers, offsetting global declining bee populations.

A decade or two from now it’s entirely plausible that we could see fleets of drones crisscrossing our cities. Some will be delivering medicine to housebound patients and vaccines to hospitals, while others will drop off lunches and contracts for harried city workers. Drones will be performing bridge assessments following winter storms, monitoring air pollution, delivering live broadcasts or even carrying people.

Drones are seemingly everywhere – but there is still plenty of scepticism. As Richard Andrew Williams rightly points out, there is a host of regulatory, legal and practical barriers to overcome before drones become a fixture of the urban landscape. Our cities have been transformed by a succession of technological breakthroughs over the last two centuries: the arrival of electricity, telephones and of course the car. In the 21st century, drones could have a similarly profound impact, swooping amongst skyscrapers and flying high above our roads and rail lines.

But turning that vision to reality won’t be easy. Indeed, the prospect of packages dropping via parachutes over densely populated areas means we urgently need smart policy development and a wider public conversation about how this technology impacts our lives.

Some challenges still to be addressed are technical in nature: engineering vehicles that can operate quietly and autonomously, designing infrastructure like landing pads or next generation air traffic control systems, creating better sensor technology and emergency landing capabilities, agreeing on technical standards that enable scalability and interoperability. While these questions are largely solvable, not enough has been done on how they operate together, at scale, in real-world environments.

From a policy point of view, the big questions are about whether drones should be restricted to well-defined routes. The Civil Aviation Authority’s Dronecode limits where and how drones can fly – but this is only a start.


Possible exceptions pose thorny ethical debates. For instance, we’ll need to decide how to enable a drone carrying a life-saving organ to surpass standard flight paths, or whether some operators can pay for premium routing priority and faster, more direct routes. Will key parts of the infrastructure like landing pads be open to anyone, as roads are? If so, how will the public pay for and manage them? These considerations echo the current narrative around the autonomy of driverless cars, but are not being given the same attention.

Another cluster of issues centres on real-time data sharing and the appropriate rights of regulators. How will flight paths and movement in real time be shared, to achieve optimal coordination? Should regulators be able to override the drone’s controls? For example, if drones are hacked (as drug traffickers along the US-Mexico border have done) or go haywire, what will trigger decision-makers to step in? As cities from New York and London to Helsinki and Sofia have opened up transport data to improve urban mobility, the data generated from drone-based services can similarly illuminate local movement patterns and services needs – if managed correctly.

Other issues to tackle will be inherently economic. We don’t yet know how drones will influence patterns of economic growth, or particular sectors, such as insurance or logistics. After the US released drone regulations last year, forecasters predicted that the industry will create 100,000 new jobs by 2025 – but others worry that increased automation will leave some workers out in the cold. Before long we’ll also face questions of tax. Will drone usage require registration fees or pay-per-mile arrangements to cover the costs of shared infrastructure?

And most importantly, who will make these decisions?

A century ago the regulation of cars moved forward haphazardly, mainly thanks to problems: crashes, accidents and pollution. All too often, a new technology comes along and cities must find ways to adapt. This is an opportunity to think differently and move the conversation forward, bringing together cities, technologists, regulators and the public.

Drones could be a fantastic boon for cities. but that requires careful thought now – which will be as much about urban planning as it is about technological design.

Geoff Mulgan, Tris Dyson and Kathy Nothstine at innovation foundation Nesta.

Nesta’s Challenge Prize Centre is looking at how drones can enhance city life rather than damage it. It is scoping a series of outcome-based funding opportunities, culminating in live, large-scale and complex urban drones systems demonstrations projects.

 
 
 
 

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.