I would like to see a minimal version of the GPS hailing as a market experiment.

If a licensed livery company can pick up people who've made reservations but not people who hail them on the street, create a quick reservation system for all livery companies, i.e. everyone but cabs, that allows someone to reserve a car they see coming down the street as quickly as raising your hand to hail a cab.

Comply with legislation by only doing pickups based on reservations, but structure the system so you could operate as if you were a cab. Before any kneejerk legislation is created to preserve the medallion monopoly, what might happen with respect to the 4 reasons cited for the monopoly?