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Tim Stonor and his children are standing on the verge of a traffic junction in the historic Kent town of Faversham. It鈥檚 an idyllic scene 鈥� as junctions go 鈥� with Faversham Creek rippling past and a family of ducks ambling across the grass in the spring sunshine. But local resident Stonor is not happy. As an urban designer who is trying to get people to take more physical exercise, this is exactly what he doesn鈥檛 want to see.

鈥淭his junction has been designed for the benefit of cars. At 8.30am it is teeming with kids trying to get to school but there鈥檚 nowhere to cross the road.鈥� Neither is there a bench, although this would be a lovely place to sit. 鈥淧art of the health agenda is to encourage people to be as active for as much of their lives as possible. If you鈥檙e old or infirm, you want a bench to take a little rest.鈥�

Faversham is not alone in attracting Stonor鈥檚 ire. The unfashionable discipline of town planning is suddenly big news in Britain鈥檚 fight against flab. Just under a quarter of the UK鈥檚 adults are now estimated to be obese, a trend caused by their sedentary lifestyles and calorific diets.

Designing environments and buildings that make walking more attractive is one of many weapons the Department of Health has promised to deploy as part of its 拢372m obesity strategy, launched in January. It set aside 拢30m for research into creating 鈥渉ealthy towns鈥�, and Alan Johnson, the health minister, wants the government鈥檚 15 proposed eco-towns to incorporate healthy town principles, based on best practice from around the world.

Johnson called in Stonor to help him tackle the problem. As managing director of Space Syntax, Stonor was part of a panel of health, planning and transport experts convened by the National Institute for Health and Clinical Excellence (Nice) in 2006. The body, more commonly known for its pronouncements on new drugs than forays into town planning, produced guidance in January on how urban designers can help us all slim down.

And it鈥檚 not such a great leap. Stonor says the resulting guidance doesn鈥檛 call for a wholesale rethink of town or building design 鈥� just a bit more care. The panel recommends that planners consult health experts regularly, prioritise pedestrians and consider how to make places enjoyable to walk around.

One of the best ways of creating mixed communities of users is getting everything exactly the right speed.

Tim Stonor

Usually Space Syntax uses simulation software to show clients how their buildings will work. Today, though, we are going to put an urban environment to a much tougher test: it will not only receive Stonor鈥檚 own verdict, but those of his two children 鈥� worldly vegetarian George, seven, and his four-year-old sister Katherine.

We start in Havisham鈥檚 Coffee House next to the market square. Over tea and cake, Stonor outlines the principles of designing for pedestrians. 鈥溾�楶eds鈥�, as they鈥檙e called, are always thought of as automatons, but they don鈥檛 do what you want them to. What people like most is convenience and having things in the right place, in their desire lines. That鈥檚 why you get tracks across landscaped gardens 鈥� because they鈥檙e not in the right place.鈥�

Faversham鈥檚 main drag, our first stop on the tour, is an example of how to do it right. On Market Street, there is a clearly marked crossing but pedestrians seem to feel emboldened to cross wherever is convenient. The road surface is lowered but not by much, and the crossing point is marked by a 鈥渢able鈥� 鈥� a raised area bounded by bands of grey cobbles 鈥� which function as a more genteel version of speed bumps. The more confident pedestrians feel, the more likely they are to get out of their cars.

鈥淥ne of the best ways of creating mixed communities of users is getting everything exactly the right speed. Twenty miles per hour is a good limit in the town centre. These ladies鈥� 鈥� he points towards two white-haired women driving past 鈥� 鈥渃an drive in, park and pick stuff up, and my kids can cope with the traffic.鈥� Indeed, George and Katherine seem totally unfazed, running around the wide pavement but never straying onto the road.

We approach what Stonor describes as 鈥渢he friendliest zebra crossing in the world鈥�. 鈥淧eople always stop. People almost ring you up to ask if you鈥檙e thinking of crossing. I don鈥檛 know why 鈥� probably because of the really good sight lines.鈥�

Unfortunately, as you walk away from the town centre, the provision worsens. We cross Quay Lane, another popular route home for residents, but here there is no crossing. 鈥淭here should be a consistent level of pedestrian infrastructure, regardless of whether there鈥檚 a bus stop or not,鈥� says Stonor.

If you can鈥檛 stop, you can鈥檛 transact socially or
economically and places don鈥檛 have value.

Tim Stonor

Smack Alley 鈥� named after a type of boat rather than the opiate 鈥� is another well-used cut-through, but the quality of lighting and surfacing is poor. There are three streetlights, but they鈥檙e the standard-issue highway model, and tower above the lane. At least they鈥檙e white, which is essential for facial recognition, but Stonor says people should be lit from below: 鈥淟it from the top, everyone becomes a hoodie.鈥�

George has requested we go to Faversham Creek, a tidal spur of the Thames Estuary. It鈥檚 a gravel-surfaced development of restaurants, offices and housing by the water, with brick cottages and a weeping willow on the opposite bank. But there鈥檚 a flaw. We鈥檇 like to walk along the river but in one direction the path disappears and on the other, it鈥檚 blocked by a stub of brickwork. 鈥淚 wish there was a path along the water, don鈥檛 you?鈥� says George. 鈥淚t鈥檚 not big bits of infrastructure we need, just a little bit of consideration,鈥� adds Stonor.

As we turn to head back to town along the road, there鈥檚 another disappointment. The pavement is wide enough only for us to walk in single file. 鈥淵ou should be able to walk hand in hand with a child,鈥� says Stonor.

The Nice guidance recommends that pedestrians take priority over all other road users. Actually, it鈥檚 already a tenet of planning guidance but is frequently flouted. For example, where Napleton Road meets the busy South Road, it鈥檚 mouth widens dramatically, like an estuary 鈥� ideal for turning cars, but dangerous for the people who cross it. Pedestrians are supposed to walk a little way down Napleton Street to cross, but you can see from the worn patches in the verge that many take their chance with the traffic.

The final stop on our walking tour is a shortcut known, to Stonor and his friends, only as 鈥淧oo Alley鈥�, a 150m stretch linking the main road to the swimming pool and the town centre. 鈥淲atch where you鈥檙e walking,鈥� he advises. The tarmac is poor and the lighting sparse and badly maintained. It would also benefit from the installation of dog waste bins. The result: one of Stonor鈥檚 friends drives her daughter the five minutes to the pool rather than brave the alley.

It鈥檚 considerations such as these that led Norman Foster to turn to Space Syntax when completing the pedestrianisation of Trafalgar Square, and it鈥檚 why the firm has been given a role in untangling the spaghetti of dingy underpasses and roundabouts in Elephant & Castle, south London. 鈥淲hen we did Trafalgar Square, people asked how much more quickly they鈥檇 be able to get across. We said it might take them another hour 鈥� because they might stop to eat their lunch. If you can鈥檛 stop, you can鈥檛 transact socially or economically and places don鈥檛 have value.鈥�

Afterwards, over a pint of local ale in a child-friendly beer garden, Stonor considers the government鈥檚 proposals to make eco-towns into healthy towns. 鈥淎 lot of professionals just don鈥檛 realise their actions can have consequences on health. Current planning policy prioritises safety, and the idea that we鈥檝e got to create safe environments, but nobody鈥檚 been thinking about activity. Faversham isn鈥檛 a bad place. A couple of crossings might make all the difference.鈥�