I ride a train 5 days a week. Not every destination can be reached by train. We need a multimodal approach to transport.
In the morning I ride to the railroad station with my own bike. There I take the train to the nearest hub and depending on my final destination I take a train or a bus. When I take the train I always take a shared bike for the last part of my journey.
Sometimes I really need to take a car because there is no suitable connection or the total commute takes up to much time by public transport. Then it would be great to eb able to call a self driving car to get me to my destination. A car that uses the highway and maind roads as if it was a railroad. Just attach your car to the line of cars passing. They could all go at the same speed and crossings could be arranged at turn by turn system so nobody really has to wait.