Meanwhile, in Europe, Volvo is pursuing the convoy model of driverless cars. In this model, a human-driven truck or bus takes the lead and anyone whose car has the appropriate technology can follow with the cars being driven by signals from the lead vehicle.
That’s an interesting idea, but I don’t think it will go very far. People won’t want to pay for the added hardware in their cars until there are a lot of highways with a lot of professionally driven vehicles providing the lead service. Trucking companies will have little incentive to add the electronics their trucks would need to become lead vehicles, which means government will need to subsidize it. Until lots of cars have the equipment needed to take advantage of those services, governments will have little incentive to provide the subsidies.