Self-driving mini-vans could lie in the car / public bus & subway trade-off on high traffic commute roads. car: high flexibility, high cost public transport:

Self-driving mini-vans could lie in the car / public bus & subway trade-off on high traffic commute roads. car: high flexibility, high cost public transport: low flexibility (last mile, connections, fixed time schedule), lower cost self-driving vans: medium flexibility, possibly low cost.