We can reclaim cities from the car without inconveniencing people

Stuck in this. Image: Slick-o-bot at Wikimedia Commons.

Since the 1920s, the car has revolutionised the way people travel; eliminating the constraints of distance while offering a personal, fast and convenient way to get from one place to another. Cities have been designed and built to make space for cars, and many cities which existed centuries before the advent of the car reshaped their streets to accommodate it.

The car, along with investments in major road infrastructure, has allowed people to live further away from city centres. The result has been that residential settlements can sprawl out over large areas – a perfect example is US surburbia. Yet people’s dependence on cars poses a major threat to public health and the environment.

It is estimated that there are more than a billion cars in the world. As well as driving up energy use, contributing to more than 70 per cent of C0₂ emissions in the transport sector and reducing air quality, cars are also responsible for increasing obesity and chronic illnesses and killing more than 1.25m people around the globe every year in traffic accidents.

Cities around the world are taking steps to reduce the dominance of the car, to benefit residents and the environment. Of course, big changes in urban planning and individual behaviour are likely to take decades to accomplish. But while there’s no one plan which can work for every city, there are a few ways that authorities can reduce people’s dependence on cars, and reclaim space for pedestrians, cyclists and public transport.

1. Introduce car-free zones and charges

Car-free zones and charges are increasingly being adopted in cities around the world. These areas, which deter or restrict car use, can range in size and nature. In some cities, such as Copenhagen and Brussels, cars are entirely banned from parts of the city centre.

Other cities have instituted partial bans: for example, in Madrid, cars not belonging to residents are banned from the heart of the city. The entire city of Ghent, in Belgium, is car-free – but public transport, taxis and other permit holders may be allowed to drive through the city at up to five kilometres per hour. Elsewhere, like in central London, charges are applied to drivers entering during peak hours or using polluting vehicles.

To make these restrictions work, it’s crucial for city authorities to gain public support for them. The 2008 attempt to introduce what would have been the UK’s largest congestion zone in Greater Manchester was rejected in a referendum by 79 per ecnt of voters on a 53.2 per cent turnout. A number of opposition groups, involving businesses, residents and leaders of councils, mobilised to defeat the plan.

Many did not support the proposals in Manchester because they did not feel adequately consulted. Perhaps experimenting first at a much smaller scale, in the city centre, and gradually expanding to other parts of the city would also help people to accept the proposals.

2. Provide public transport alternatives

Many people living in suburbs or on the outskirts of cities might view restrictions on cars negatively, as a source of inconvenience or even a loss of freedom. An obvious way to address these concerns is to provide people with reliable, flexible and cost-effective public transit.

Adequate investments in public transit today will provide benefits in the long term. For example, evidence shows that there is an overall decreasing trend in car use in many cities across Europe, the US and Australia. A number of factors explain this trend, including the provision of public transit, having more older people who tend to drive less and the rise in fuel prices.

What’s more, young people today – especially young men – are delaying learning to drive and are less likely to own a car, compared to the generation before them. If fewer people are going to drive, then the public transport of the future needs to be affordable and accessible for both young and old.


3. Reshape the city

Significant progress towards reducing car use will be made by addressing underlying factors through urban planning. We need to build high density, mixed-use developments with affordable housing and excellent green spaces. We need to offer people the opportunity to live closer to shops, employment and recreation, thereby promoting “active” travel such as walking and cycling.

There are examples of planned and ongoing urban developments across the globe, including Masdar City in the United Arab Emirates and The Great City in China prioritising walking and public transit over cars, as well as experimenting with electric and driverless vehicles. These new developments are aiming to provide basic services within walking distance, create safe spaces for people to walk and provide public transit that uses clean energy.

Cities such as Copenhagen, Amsterdam, Malmo and Utrecht are reallocating road space from motorised to non-motorised transport and investing in new cycling infrastructure. It should not be unthinkable to have protected cycle highways connecting suburban communities to their city centres, as has been the case for cars for many decades.

So, there are a number of ways by which cities could significantly reduce car dependence and ultimately become car-free. But such policies must aim to change behaviours, as well as reshape the built environment. Both inner city and suburban residents must be able to access reliable public transport.

Above all, people want to be heard and involved in designing interventions that directly affect them. If people can own the vision and understand the benefits of the car-free city, then nothing will stand in the way of reclaiming the city from the car.

Richard Kingston, Professor of Urban Planning and GISc, University of Manchester and Ransford A. Acheampong, Presidential Academic Fellow in Future Cities, University of Manchester.

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

 
 
 
 

The IPPC report on the melting ice caps makes for terrifying reading

A Greeland iceberg, 2007. Image: Getty.

Earlier this year, the Intergovernmental Panel on Climate Change (IPCC) – the UN body responsible for communicating the science of climate breakdown – released its long-awaited Special Report on the Ocean and Cryosphere in a Changing Climate.

Based on almost 7,000 peer-reviewed research articles, the report is a cutting-edge crash course in how human-caused climate breakdown is changing our ice and oceans and what it means for humanity and the living planet. In a nutshell, the news isn’t good.

Cryosphere in decline

Most of us rarely come into contact with the cryosphere, but it is a critical part of our climate system. The term refers to the frozen parts of our planet – the great ice sheets of Greenland and Antarctica, the icebergs that break off and drift in the oceans, the glaciers on our high mountain ranges, our winter snow, the ice on lakes and the polar oceans, and the frozen ground in much of the Arctic landscape called permafrost.

The cryosphere is shrinking. Snow cover is reducing, glaciers and ice sheets are melting and permafrost is thawing. We’ve known this for most of my 25-year career, but the report highlights that melting is accelerating, with potentially disastrous consequences for humanity and marine and high mountain ecosystems.

At the moment, we’re on track to lose more than half of all the permafrost by the end of the century. Thousands of roads and buildings sit on this frozen soil – and their foundations are slowly transitioning to mud. Permafrost also stores almost twice the amount of carbon as is present in the atmosphere. While increased plant growth may be able to offset some of the release of carbon from newly thawed soils, much will be released to the atmosphere, significantly accelerating the pace of global heating.

Sea ice is declining rapidly, and an ice-free Arctic ocean will become a regular summer occurrence as things stand. Indigenous peoples who live in the Arctic are already having to change how they hunt and travel, and some coastal communities are already planning for relocation. Populations of seals, walruses, polar bears, whales and other mammals and sea birds who depend on the ice may crash if sea ice is regularly absent. And as water in its bright-white solid form is much more effective at reflecting heat from the sun, its rapid loss is also accelerating global heating.

Glaciers are also melting. If emissions continue on their current trajectory, smaller glaciers will shrink by more than 80 per cent by the end of the century. This retreat will place increasing strain on the hundreds of millions of people globally who rely on glaciers for water, agriculture, and power. Dangerous landslides, avalanches, rockfalls and floods will become increasingly normal in mountain areas.


Rising oceans, rising problems

All this melting ice means that sea levels are rising. While seas rose globally by around 15cm during the 20th century, they’re now rising more than twice as fast –- and this rate is accelerating.

Thanks to research from myself and others, we now better understand how Antarctica and Greenland’s ice sheets interact with the oceans. As a result, the latest report has upgraded its long-term estimates for how much sea level is expected to rise. Uncertainties still remain, but we’re headed for a rise of between 60 and 110cm by 2100.

Of course, sea level isn’t static. Intense rainfall and cyclones – themselves exacerbated by climate breakdown – can cause water to surge metres above the normal level. The IPCC’s report is very clear: these extreme storm surges we used to expect once per century will now be expected every year by mid-century. In addition to rapidly curbing emissions, we must invest millions to protect at-risk coastal and low-lying areas from flooding and loss of life.

Ocean ecosystems

Up to now, the ocean has taken up more than 90 per cent of the excess heat in the global climate system. Warming to date has already reduced the mixing between water layers and, as a consequence, has reduced the supply of oxygen and nutrients for marine life. By 2100 the ocean will take up five to seven times more heat than it has done in the past 50 years if we don’t change our emissions trajectory. Marine heatwaves are also projected to be more intense, last longer and occur 50 times more often. To top it off, the ocean is becoming more acidic as it continues to absorb a proportion of the carbon dioxide we emit.

Collectively, these pressures place marine life across the globe under unprecedented threat. Some species may move to new waters, but others less able to adapt will decline or even die out. This could cause major problems for communities that depend on local seafood. As it stands, coral reefs – beautiful ecosystems that support thousands of species – will be nearly totally wiped out by the end of the century.

Between the lines

While the document makes some striking statements, it is actually relatively conservative with its conclusions – perhaps because it had to be approved by the 195 nations that ratify the IPCC’s reports. Right now, I would expect that sea level rise and ice melt will occur faster than the report predicts. Ten years ago, I might have said the opposite. But the latest science is painting an increasingly grave picture for the future of our oceans and cryosphere – particularly if we carry on with “business as usual”.

The difference between 1.5°C and 2°C of heating is especially important for the icy poles, which warm much faster than the global average. At 1.5°C of warming, the probability of an ice-free September in the Arctic ocean is one in 100. But at 2°C, we’d expect to see this happening about one-third of the time. Rising sea levels, ocean warming and acidification, melting glaciers, and permafrost also will also happen faster – and with it, the risks to humanity and the living planet increase. It’s up to us and the leaders we choose to stem the rising tide of climate and ecological breakdown.

Mark Brandon, Professor of Polar Oceanography, The Open University.

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