How do you design a city where moving is the obvious choice?
Look down on a six-lane road in the centre of a capital city on a Sunday morning, and you see something that should not be possible. The full width of the tarmac, the lanes built to move thousands of cars, is covered in people instead. Cyclists, runners, a family on rollerblades, a grandmother on a tricycle, children weaving through the crowd. Not one car. The road has not been turned into a park; it is still a road. It has simply, for one morning, been handed to people rather than traffic, and close to a quarter of the city has come out to use it.
This is the Ciclovía in Bogotá, and the image of it, a motorway with no cars and a river of people, makes the whole argument before a word is said. It is one of the clearest examples there is of designing behaviour rather than demanding it, and the mechanism behind it is the same one that decides whether people in your office take the stairs, whether your savings grow, and whether the change you keep asking for ever happens.
What Bogotá actually did
Every Sunday and on public holidays, Bogotá closes more than 120 kilometres of its main roads to motor traffic, from early morning until mid-afternoon. The streets are handed over to people on foot and on wheels. The programme has run in some form since the 1970s, and it has grown into a fixture of the city's life. On a typical week, somewhere between one and a half and two million people take part. In a city of roughly seven to eight million, that is close to a quarter of the population, out moving, in public, by choice.
No one is required to be there. There is no fine for staying home, no reward for showing up, no campaign of posters telling citizens that exercise is good for them. The thing that produces the behaviour is not a message. It is the road.
Why this is design, not motivation
Here is the part that matters. The instinctive way to get a city moving would be to launch a health drive. Tell people about the dangers of inactivity, publish the guidelines, run the adverts with the upbeat music. We have all seen those campaigns, and we have all watched them fade into the background within a fortnight.
Bogotá did not try to change what people want. It changed what is easy. On an ordinary day, the path of least resistance in a car-dominated city is to drive, or to stay off roads that feel hostile to a person on a bike. On Ciclovía Sunday, that calculation flips. The cars are gone, the road is safe and open and inviting, and the easiest, most obvious thing to do on it is to move. People do not have to overcome anything. They follow the path that has been laid out for them, and that path happens to lead to two million people exercising.
This is the difference between motivation and design. Motivation works on the person and asks them to push against their environment. Design works on the environment so the person does not have to push at all.
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The science: the path of least resistance
The behavioural principle underneath Ciclovía is the path of least resistance, sometimes discussed as the role of friction in behaviour. The core finding, repeated across decades of behavioural science, is uncomfortable for anyone who likes to think of themselves as a rational agent: we take the easy option far more reliably than we act on our stated intentions. The brain treats effort, even tiny amounts of it, as a cost to be avoided. A behaviour that requires one less step, one less decision, one less moment of friction, is dramatically more likely to happen, almost regardless of how much people say they want the alternative.
This is why the small things decide so much. Whether the healthy food is at eye level or on the bottom shelf. Whether signing up takes one click or five. Whether the bike is by the door or in the shed behind a locked gate. None of these touch how much someone wants the outcome. All of them change which behaviour is the path of least resistance, and the path of least resistance is the one most people take.
Ciclovía is this principle applied at the scale of a city, and the research has measured what it produces. A study by Andrea Torres, Olga Sarmiento and colleagues, published in the American Journal of Public Health in 2013, surveyed a thousand Ciclovía participants and a thousand users of the city's permanent bike-path network.[1] Most Ciclovía participants, around 60 per cent, were meeting the recommended level of physical activity in their leisure time, and they reported markedly higher social capital, the trust and sense of connection between people, than the comparison group, with roughly twice the odds. The open road does not just move bodies. It brings people into the same space, and connection follows.
No behaviour is purely a matter of willpower
This is where Ciclovía stops being a nice story about a faraway city and starts being useful. The lesson is that when a behaviour is not happening, the first question is usually wrong. We ask: how do I make people want this more? How do I motivate them, remind them, incentivise them? But far more often, the behaviour is not missing because the wanting is missing. It is missing because the environment is quietly making the wrong thing easy.
People do not act on their intentions. They act on what is easy. That single sentence, taken seriously, changes where you put your effort. Instead of working on the person, you work on the path.
Through a Behavioural Design lens: the barrier they removed
It is worth naming what Bogotá actually did, because it is a clean example of how Behavioural Design works, as opposed to how we usually try to change behaviour. The default approach is to push: more information, more motivation, a stronger case for why people should move. In our method at SUE that push is only half the picture, and usually the weaker half. Behavioural Design is, more than anything, the game of taking away barriers.
In the SUE Behavioural Design Method, when we look for ideas to shift behaviour we use a tool we call SWAC, which separates four levers: a person's CAN (their capability to do the thing), their WANT (their willingness), the SPARK that triggers them at the right moment, and the AGAIN that turns it into a habit. The instinctive health-campaign approach pours everything into WANT, trying to make people want to exercise more. Ciclovía barely touches WANT. It works almost entirely on CAN: it makes the desired behaviour so easy that capability stops being the obstacle. No traffic, no danger, no planning, just open road. When you raise CAN that dramatically, you often do not need to touch WANT at all.
This is the move that travels, and it has nothing to do with bikes. A bank that wants people to save raises CAN by making the transfer automatic, rather than lecturing them about thrift. A hospital that wants better hand hygiene puts the gel in the doorway, rather than adding another reminder to try harder. The question Behavioural Design asks first is not how do I make people want this more, but what is making the desired behaviour hard, and how do I remove it. Find the barrier, take it away, and behaviour you have been asking for often simply appears.
What this means in practice
It is tempting to file Ciclovía under city planning and move on, but the same lever sits underneath most of the behaviour we struggle to change, starting with our own. Think of something you keep meaning to do and do not. The standard advice is to want it more: more discipline, more motivation, a stronger reason. Bogotá suggests the opposite. You are far more likely to start exercising because the kit is laid out and the gym is on your route than because you summoned more willpower. Lower the friction and the behaviour follows. Most personal change that sticks is quietly a redesign of how easy or hard something is, not a victory of will.
The same move scales up to leading people. When a team will not adopt the new way of working, the instinct is to push: another briefing, another reminder of why it matters. Far more effective is to ask what makes the old behaviour the path of least resistance and remove it, so the new way becomes the easy one. A good leader changes what is effortless, not just what is expected.
And it scales again to the organisation and its customers. Why do users abandon the sign-up halfway? Rarely because they stopped wanting the product; far more often because one step asked too much. Why does the new system go unused, the change programme stall at week six? Because the surrounding environment still makes the old behaviour easier, and no amount of launch enthusiasm outlasts that. In every case, personal, team, organisational, the high-leverage question is the same: not how do I make people want this more, but what makes it hard to do, and how do I take that away.
What you can design this week
The same move works on a habit of your own, a team you lead, or a customer you are trying to reach. Three ways to start:
Strip a step out of the behaviour you want. For yourself, remove one piece of friction from the thing you keep avoiding: lay it out the night before, delete the app that distracts you. For a team or customer, take out one click, approval or hand-off so the behaviour you want becomes the easy one.
Add friction to the behaviour you want less of. You rarely have to ban anything, in your own life or anyone else's. Make the unwanted option take one extra step, make the better option the default. A modest obstacle tips the choice, exactly as removing the cars tipped a whole city.
Read the situation before you blame the person, including yourself. When you keep failing at something, or a team will not adopt it, or a customer drops off, resist the conclusion that the will is missing. Walk through the actual steps and ask what the situation is making easy. The fix is usually in the path, not the person.
Bogotá did not persuade a quarter of its population to exercise. It built a situation in which moving was the easiest thing available, and got out of the way. That is exactly as useful for a habit you cannot stick to, a team you are trying to move, or a sales funnel that leaks, as it is for a Sunday in a Colombian city.
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Frequently asked questions
What is Ciclovía in Bogotá?
Ciclovía is a weekly programme in Bogotá, Colombia, in which more than 120 kilometres of main roads are closed to motor traffic every Sunday and on public holidays. Between one and a half and two million people use the streets to cycle, run, skate and walk — close to a quarter of the city's population, with no obligation, reward or campaign to drive it.
What is the path of least resistance in behavioural science?
The path of least resistance is the observation that people tend to take the option that requires the least effort, almost regardless of their stated intentions. The brain treats even small amounts of friction as a cost to be avoided. Reducing friction from a desired behaviour, or adding it to an unwanted one, is one of the most reliable levers in behavioural design.
How does Ciclovía relate to behavioural design?
Ciclovía is a textbook example of designing behaviour rather than demanding it. Instead of running campaigns to motivate people to exercise, Bogotá changed the environment so that moving became the easiest option available. It works on CAN (capability) rather than WANT (motivation), which is usually the more powerful lever in behaviour change.
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