There's a housing crisis in many cities. But cars can park free. Why not claim public street-space for those who need it? If you disguise your shelter as a polluting, duly-licensed private vehicle, like artist Michael Rakowitz did...
...the authorities should be fine with it.

More on this thought-provoking art project here:

http://www.michaelrakowitz.com/plot-proposition-i

(p)LOT: Proposition I β€” MICHAEL RAKOWITZ

MICHAEL RAKOWITZ
"You'll never be unhoused in Americaβ€”if you're a car."
There are 2 billion parking spaces in the US.
The nation now builds more 3-car garages than 1-bedroom apartments.
@straphanger could self driving cars change this? They only need to be present when we need them. Other times they can go away on their own, perhaps to a central facility, and wait to be called.