Arizona DOT publishes this data and it sometimes contains this information in at least text form. I'm almost certain Google parses that for maps, but I doubt Wa

Arizona DOT publishes this data and it sometimes contains this information in at least text form. I'm almost certain Google parses that for maps, but I doubt Waymo uses it for much more than graylist avoidance areas and prioritizing where they'll send mapping cars, if even that. The data simply isn't detailed or reliable enough to use directly.