There has been a revolution in urban transportation over the past five years--set off by start-ups across the US and internationally. Sleek, legible mobility platforms are connecting people to cars, trains, buses, and bikes as never before, opening up a range of new transportation options while improving existing ones. While many large city governments, such as Chicago, New York, and Washington, D.C., have begun to embrace creative forms and processes of government, most still operate under the weight of an unwieldy, risk-averse bureaucracy.
With the advent of self-driving vehicles and...