I wonder how small/efficient (and compatible with the rest of the world’s existing ecosystem without requiring special large parking spots and such, high in a c

I wonder how small/efficient (and compatible with the rest of the world’s existing ecosystem without requiring special large parking spots and such, high in a city might be a big difficulty to retrofit) a purpose-built, self-driving vehicle could be. If the wheelchair doesn’t need to be in a position to drive, it would be a lot easier to fit it in a shorter wheelbase, with a less expensive mount. You would still need some greater height than a regular sedan, but probably could be narrower and load through the rear. I assume you would still want space for 1-3 other passengers. EV makes this even better — you could potentially make a city car for a wheelchair user which fit in the same footprint as a Mini Cooper. Even if these were inherently more expensive, and had higher costs due to lower production runs, it might save enough on other costs to be worth it. They would also be viable paratransit or Uber model rentals (assuming self driving becomes the default) so even $200k vehicles could work. If the system were sufficiently on demand and convenient, dropping ADA from existing large buses and other transit, making them cheaper and more reliable, could potentially be a net savings.