Nick Bilton:

As scientists and car companies forge ahead — many expect self-driving cars to become commonplace in the next decade — researchers, city planners and engineers are contemplating how city spaces could change if our cars start doing the driving for us. There are risks, of course: People might be more open to a longer daily commute, leading to even more urban sprawl.

That city of the future could have narrower streets because parking spots would no longer be necessary. And the air would be cleaner because people would drive less. According to the National Highway Traffic Safety Administration, 30 percent of driving in business districts is spent in a hunt for a parking spot, and the agency estimates that almost one billion miles of driving is wasted that way every year.

“What automation is going to allow is repurposing, both of spaces in cities, and of the car itself,” said Ryan Calo, an assistant professor at the University of Washington School of Law, who specializes in robotics and drones.

Harvard University researchers note that as much as one-third of the land in some cities is devoted to parking spots. Some city planners expect that the cost of homes will fall as more space will become available in cities. If parking on city streets is reduced and other vehicles on roadways become smaller, homes and offices will take up that space. Today’s big-box stores and shopping malls require immense areas for parking, but without those needs, they could move further into cities.

The Autonomous Intersection Management project, created by the Artificial Intelligence Laboratory at the University of Texas at Austin, imagines cities where traffic lights no longer exist but sensors direct the flow of traffic. Although a video showing off the automated traffic intersection looks like total chaos, the researchers insist that such intersections will reduce congestion and fuel costs and can allow cars to drive through cities without stopping.