While it's not Rome, the operating areas for Waymo, at least in San Francisco, are not all grids of modern wide streets either.
I'm still puzzled on why Waymo insists on not having any remote driving or any remote advising cars on where/how to get themselves out of a situation. Yes that would cost a little more - but this is early stages so it's just a little more money at this point (lol) - in exchange for avoiding embarassing PR bullshit about cars self-honking at each other or rides stuck in infinite hesitation loop or not knowing what to do when there is a traffic cone on the hood. I haven't seen any convincing arguments for not having that. Anyone heard a legitimately good tech or liability reason? I doubt I would have missed it but...