The world will add four billion more people by the end of the century, and over 70 percent of them will live in cities. Accommodating that swell will be the mission for generations of urban planners, as they will be forced to reshape city grids to make the most of limited space.

What won’t help the space crunch? Autonomous cars. That’s the opinion of Peter Calthorpe, a 30-year veteran of urban design, who during a Wednesday TED Talk in Vancouver wasn’t confident self-driving cars will be the answer.

“There’s almost too much hype here,” Calthorpe said.

While self-driving cars could create a reduction in the number of cars on the road, they will inevitably create more “moving miles.” That is, people will be inclined to use cars to travel longer distances and that will only exacerbate urban sprawl and the problems that come with commuting.

Calthorpe fears what might happen if people choose to forego ridesharing in favor of privately owned autonomous cars, which he says surveys suggest will be the case.

“If [people] don’t share [these cars], you can end up with a 90 percent increase” in total miles driven.

Even if self-driving cars are shared by more than one person — a future being forecasted by everybody developing autonomous cars, including Elon Musk — there is still a 30 percent increase in those “moving miles,” Calthorpe projected.

“Walking, biking, and [mass] transit are the way cities and communities thrive,” Calthorpe said,

Calthorpe and his firm worked with city planners in Jinan, China, a city of over 4.4 million, to create designs to make better use of the city’s underdeveloped spaces. A third of the Chinese population uses cars to travel, and it’s contributed to a spike in motor vehicle-associated deaths, pollution, and congestion.

“It’s a deadly environment they’re building,” said Calthorpe.

peter calthorpe ted talk urban design china
Peter Calthorpe presenting his TED Talk on Wednesday. 

Calthorpe and his team created a concept for an increased “green edge” of forest by the water to preserve ecological features, instead of simply bulldozing and leveling sites to prop up new buildings. In addition, more walking and biking paths were created out of street space.

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“If only one-third of people have cars, why give 100 percent of the street space to cars?” he said.

To that end, Calthorpe lists seven guiding principles he has used during his work and research into the future of Chinese urban development, and thinks they can apply to most places around the world:

  • Preserve natural ecologies, historical sites, and agriculture as a way to foster imbue urban communities with a sense of identity
  • Create more opportunities for mixed-use infrastructure as well as mixed-income communities, to stymie monolithic neighborhoods divided by wealth
  • Emphasize walkability. “The places you go on vacation are places you can walk,” said Calthorpe. “Why not make it everywhere?”
  • Biking is easier, affordable, and a great way reduce the number of cars on the road. China, according to Calthorpe, seems serious about returning to bicycles as a staple form of transportation once again.
  • Connecting many kinds of streets into one to allow for multiple modes of transportation on a single path, to reduce the need to construct several different tracks.
  • Investing heavily in high-quality mass transit and affordable bus rapid transit systems.
  • Focusing matching city density with transit capacities, in order to avoid overwhelming different modes of transportation with too many commuters.

Calthorpe hopes these lessons can help the world avoid an epidemic of global sprawl, and turn cities into zones of cosmopolitan efficiency and high living. We’ve got 86 years to work on it.

Photos via TED, Peter Calthorpe / TED Talk