[drivingmenuts]

The really evil part of me is thinking, and maybe I've got the wrong end of the stick here, like this:

When you request a ride with a taxi-service, it's up to the discretion of the service which car to send. You need something for a wheelchair? Fine, they send you what's available from their fleet.

When you request a ride from Uber or Lyft, those two are just middlemen who put you in touch with one of a thousand little companies. Potentially, each one is available.

So, here's the evil bit: require each ride-providing service (a taxi company or an Uber contractor or a Lyft contractor) to provide a minimum of one or two ADA-compliant vehicles.

The independent contractors for Uber and Lyft immediately go away, except for the one or two that are so wealthy as to be able to afford a ramp-van or other compliant vehicle.