Ask him about urban design and there’s a good chance that Demetrio Scopelliti, Director of Urban Planning and Public Space in Milan, Italy, will get personal. His childhood neighbourhood had no sidewalks, so he roamed his neighbourhood streets, bouncing between his house and his school, friends’ homes and the basketball court behind the local church. His mobility habits changed abruptly at age 18 when he learned to drive. It’s a typical story: coming of age and transitioning from footpower to horsepower. But keep listening and Scopelliti will share how a family tragedy reversed that trajectory and inspired him to give up driving and devote his life to restructuring how city dwellers, including his own three-year-old son Elia, use Milan’s sidewalks and streets.

In Italy today, most streets are built for cars, not people. This point was made jarringly clear to Scopelliti when he was a young adult, finishing university, and an SUV hit his Aunt Paola, Uncle Francesco, and their 10-year-old son Marco. Their deaths were devastating. 3,000 Italians die in car crashes each year, a tragedy that Scopelliti believes is built into his country’s car-centred infrastructure.

As a public servant, his goal is to make his city safer for pedestrians and bikers and most especially children, like his son, who he walks to and from school each day. “The city that’s good for kids is a good city for everyone,” he told me. Yet for years, his dream of converting parking spaces and asphalt into public parks and walkways felt elusive. Habits are hard to change. Ask people to stop driving and Scopelliti says they become aggressive and sharp, more aware of what they’re losing than what they’re gaining. “It’s polarising.”