Set two points by address or by clicking the map; optionally add waypoints. Covers the US and London (more cities to come). See the driving distance and how much of the route falls between their administrative units at each level.
Boundary, geocoding, and routing data come from public sources (US Census, OpenStreetMap/Nominatim, OSRM). No guarantee is made of its accuracy — this is an approximation tool for the curious, not for navigation, legal, or official use.