Hamburg's Green Network: The Plan to Make Cars Unnecessary

Hamburg did not ban cars. In January 2014 the city described a long-term Green Network plan: link its parks, gardens, playgrounds, sports grounds and cemeteries with continuous walking and cycling routes, so that within roughly 15 to 20 years a person could cross the city from the outskirts to the centre without needing a car. Headlines turned that into "Hamburg goes car-free", but the idea was more practical and more interesting than that: make driving unnecessary for many everyday and weekend trips by giving people a green, connected alternative.

Image: 02B

Below is what the plan actually said, how Hamburg's green network is put together, why a large port city cared so much about it, and what the project can teach other places that want fewer cars without forbidding them.

What the Green Network plan proposed

Hamburg is Germany's second-largest city, a busy port on the Elbe with close to two million residents. It already had a lot of open space. According to the city's figures reported by ArchDaily, around 40% of Hamburg's area is made up of green areas, cemeteries, sports facilities, gardens, parks and squares. The problem was not a lack of greenery but that the pieces were scattered. Getting from one park to another, or from a suburb to the centre, usually meant using a road, and in practice the car was the only convenient way to move between many parts of the city.

The Green Network plan set out to join those pieces. New paths and corridors would connect existing parks and gardens so that pedestrians and cyclists could follow green routes across the whole city. City spokeswoman Angelika Fritsch told reporters that within 15 to 20 years people would be able to explore the city exclusively on bike and foot. She also contrasted Hamburg with London: London has green belts and rings, but Hamburg's network was meant to reach all the way from the outskirts into the city centre.

The plan was coordinated by a core team working with representatives from the municipalities around the city, because a network that stops at the city boundary would only solve half the problem. Some reports later described the goal as turning about 40% of the city into car-free green zones by around 2034. That number is best read as the share of the city that is already green and would be linked together, not as 40% of streets being closed to traffic. A figure of "17,000 acres" also circulated in early coverage; it does not match the 40% figure (Hamburg covers about 755 square kilometres, so 40% would be roughly four times larger), and it is safest to rely on the percentage given by the city.

How the network fits together: axes, rings and paths

Hamburg's open-space planning has deep roots. The idea of green "axes" reaching into the city goes back to the 1920s plans of city architect Fritz Schumacher, and the modern Green Network builds on that framework. According to the city's own district pages, the network has three main parts:

Landscape axes that run like rays from the countryside towards the centre, following rivers, parks and old farmland.
Two green rings, the First Green Ring close to the centre and a larger Second Green Ring further out, which connect the axes to one another.
Green path connections, smaller links and corridors that fill in the built-up areas between the larger elements.

In the Eimsbüttel district, for example, one axis runs from farmland on the northwest edge of the city, through the Niendorfer Gehege woods and past Hagenbeck's zoo, then through allotment gardens towards the inner city. The Second Green Ring is meant to tie together the Alster valley in the north, the Niendorfer Gehege and the Altonaer Volkspark in the west.

The district is open about the gaps. Its planners note that some links still need legal protection, some routes are awkwardly aligned, and land purchases or a lack of money have held up certain connections. Many green spaces, such as allotment gardens and the zoo, are only partly open to the public. That honesty is useful: a green network is not built in one go, but parcel by parcel and path by path.

Why a port city cared: heat, floods and quality of life

Transport was only part of the motive. Hamburg sits on a tidal river not far from the North Sea, and climate change is a practical concern there. ArchDaily reported that the sea level at Hamburg had risen about 20 centimetres over 60 years and was expected to rise a further 30 centimetres by 2100. Connected green spaces can soak up heavy rain and act as buffers during floods, which is far cheaper than dealing with flooded streets and basements.

Temperature was the other concern. Some articles at the time claimed that Hamburg's average temperature had risen by 9 °C in half a century. That figure is wrong. The same reporting from ArchDaily gives a rise of about 1.2 °C over 60 years, and Germany's Federal Environment Agency records an increase in the country's average annual temperature of about 1.7 °C since 1881. Those numbers sound small, but they are significant: warmer summers mean more heat stress in dense neighbourhoods, and trees and parks are one of the most reliable ways to cool a city.

Then there is everyday life. Parks linked by safe paths let people walk to work, cycle to a lake, take children to a playground or simply get some quiet without driving. The city's descriptions of the project talk about places to hike, swim, picnic and watch wildlife within the city itself, which is the kind of benefit residents notice long before any climate statistic changes.

Car-free or car-optional? Clearing up the headlines

The plan was widely reported as Hamburg "banning cars by 2034". That was never the proposal. Roads would remain, deliveries and emergency services would keep working, and nobody would be forbidden to own a car. The aim was to make a car optional for a large share of trips by offering a pleasant, continuous network for walking and cycling.

Smithsonian magazine raised sensible questions at the time: how would such a city handle large deliveries, emergencies, people with disabilities and bad weather? It also quoted Michael Sivak of the University of Michigan Transportation Research Institute, who said zero cars was probably not realistic but that having a target to work towards was still worthwhile. That is a fair way to read Hamburg's ambition. A city does not have to eliminate cars to benefit from making them less necessary.

How Hamburg compares with other cities

Hamburg was not alone. Copenhagen has spent years building cycle superhighways from the suburbs into the centre, and London introduced a congestion charge for private cars entering central areas at busy times. Each city chose a different lever: Copenhagen made cycling fast and safe, London made driving into the centre more expensive, and Hamburg focused on stitching together green space so that walking and cycling would also be enjoyable.

The common lesson is that people change how they travel when the alternative is genuinely convenient. A painted bike lane next to heavy traffic rarely persuades anyone. A quiet, continuous path through parks that actually goes where people need to go often does.

What other cities can learn from the plan

Start with what you have. Hamburg's network uses parks, cemeteries, riverbanks and allotments that already exist. Connecting them is cheaper than creating new space from scratch.
Think in networks, not projects. A single beautiful park helps its neighbours. A linked system changes how a whole city moves.
Plan beyond the city line. Working with surrounding municipalities matters, because commuting and weekend trips do not stop at administrative borders.
Combine goals. The same green corridor can carry cyclists, absorb floodwater, cool the air and give wildlife room to move.
Be patient and honest about gaps. Land, money and legal protection take time, and a plan measured in decades will always have unfinished pieces.

Hamburg's Green Network is less a dramatic ban than a steady redesign of how a city connects its open spaces. That is exactly why it is worth studying: it shows how a large, busy, working city can make the car optional for many journeys while becoming greener, cooler and better prepared for floods.

Sources: ArchDaily, January 2014: Hamburg's plan to eliminate cars in 20 years; Smithsonian Magazine: Hamburg plans to become car-free by 2034; hamburg.de: Grünes Netz (Eimsbüttel district); German Environment Agency (UBA): Development of Germany's climate; 02B (image); originally shared via True Activist.

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