If you can just network the driverless cars up to the existing public transportation systems then we'd have a truly useful device. Just walk outside your house

If you can just network the driverless cars up to the existing public transportation systems then we'd have a truly useful device. Just walk outside your house and a car drives on up, opens its doors, and takes you to the most convenient location to transfer to a public bus, or if economical to pick up other passengers going near your destination.