Self-driving vehicles make mass transit more usable and economical, if you expand the definition of mass transit. Implement congestion taxes and dedicated lane

Self-driving vehicles make mass transit more usable and economical, if you expand the definition of mass transit. Implement congestion taxes and dedicated lanes for high-occupancy vehicles (vehicle more than 50% occupied) and you have a fleet of highly adaptable, efficient, utilized, and available buses at a fraction of the current cost. You've eliminated some of the major problems of mass transit systems - last mile connectivity, financially marginal routes having to choose between poor service or losing money, lack of frequency at off-peak hours, relative lack of comfort, convenience, needing to know a timetable as a user.