The document discusses several ways that autonomous vehicles and mobility as a service could impact transportation systems. Robo-taxis and shared autonomous vehicles may replace personal car ownership and integrate with public transit. Autonomous trucks, delivery drones, air taxis, and automated buses and shuttles could transform long-distance freight, package delivery, and short-distance public transit. However, issues around regulation, liability, safety, congestion, and public acceptance would need to be addressed for these technologies to achieve widespread adoption.