This document discusses self-driving vehicles and how they may become shared vehicles. It notes that fully self-driving vehicles (level 5 automation) are likely to be used primarily for shared mobility services rather than private ownership. Shared self-driving vehicles could provide environmental and accessibility benefits by reducing traffic, emissions, and enabling transportation for those who cannot drive. However, self-driving vehicles also face challenges related to public trust, legal issues, and the need for detailed maps and real-time traffic information to operate safely. The document advocates for cities and governments to strategically plan for and support the development of self-driving and shared mobility services.