Looking up wheelchair-accessible directions to where you're going? This really works. From Google Maps:

View routes by wheelchair in select major cities with Google Maps. Just input your destination into Maps, tap "Directions" then select the public transportation icon. Then tap "Options" and under the Routes section, you will find "wheelchair accessible" as a new route type.

They'll be rolling out more locations. But I'll keep using Google Maps Street View to case out curb cutouts, threshold steps and the like. Even after phoning first, there's been way too many surprises.