This brings up another question: How will these cars react when a street is blocked and unpassable, due to heavy snowfall (unplowed), heavy rainfall over the street, mudslides & rock slides, etc?

What about where a street has parked cars on both sides and just enough room for one car to go through the middle of the street - one of the narrow city streets where drivers have to wait in the intersection for oncoming cars - will these autonomous cars wait and let drivers through, or will they get stuck?