如今，最具革命性的城市交通措施是优步，而在近期未来，最具革命性的变化可能是���动驾驶汽车 — — 它们都是私人部门的产物。
Today, the most radical step in urban transportation is Uber, and the most radical change in the near future is probably the self-driving car – both creations of the private sector.