AS a 40-year-old Parisian dad, my views on urban transportation are suitably middle-aged. Getting my son to daycare involves navigating a 40-m-wide 19th-century boulevard on which cars, motorbikes, vans, e-bikes, scooters and a newly-extended tramway all duke it out for space.

It’s 200 years of road rage at the edge of a city in the midst of a carless revolution.