Originally Posted by tandempower

There will probably be an expansion of fees and requirements related to driving empty, driving at peak/congestion times, etc. It will be more cost-effective to give someone a cheap ride in an empty self-driving car than to pay a fee for transporting it empty.

In areas where businesses block such fees, the roads will fill with empty cars and hinder business, so it will be in everyone's interest to limit road/lane waste.