The impending advent of large numbers of driverless cars in cities will change more than our transport systems. It will also cause an upheaval in the economics of cities, which are highly dependent on revenue from cars with drivers. Parking fees, parking fines and levies – e.g. for car registration and fuel – bring in some $129 per capita in large U.S. cities, according to Governing Magazine. Self-driving cars, which will park in cities without – presumably – committing any violations, will now jeopardise this revenue resulting in a 10 to 15% shortfall.