Maintaining tollway for self-driving is still going to add to "manually helping" cost. The operational domain of a vehicle includes roads of varying conditions that a human driver can navigate with relative ease.
The operation domain of general purpose consumer vehicles includes all roads of varying conditions that a human driver can navigate with relative ease, but the operation domain of e.g. an EU long-haul truck company can be easily limited to a set of pre-mapped highways.
Manual handling of problem cases that can be done from a central dispatch center would still require far less people to deliver the same cargo than now.
Manual handling of problem cases that can be done from a central dispatch center would still require far less people to deliver the same cargo than now.