It's not only the car being parked, but the traffic during peak travel times that make cars bad. Roads filled with Autonomous cars might be 10x more efficient

It's not only the car being parked, but the traffic during peak travel times that make cars bad. Roads filled with Autonomous cars might be 10x more efficient then roads filled with cars with drivers, but autonomous buses are 100x more efficient and trains can be 1000x more efficient.