This seems to be the case for many of the US-based pilot programmes. As part of this provision, real-time mapping system would need to be able to locate and book the nearest accessible vehicle. In all circumstances and situations, an adequate pool of accessible vehicles would need to be available at all times so that people with disabilities did not have to wait (much) longer than other people to make their trip. There is some experimentation underway (e.g. Uber in New York City) on mixing short-term leases for accessible vehicles, a flat incentive payment for drivers undertaking those trips and reduced commissions by the ride service platform.