In Boston it's a very frequent occurrence to be driving in the Central Artery Tunnel and have your map software think you're on the surface, or vice versa, or to be on a highway overpass and again have it think you're on a surface road that is inaccessible from your location. You get used to it.
This seems like an entirely different level of craziness, though.
Yeah I remember back in the early 2000s before phones had turn-by-turn navigation, there were PDAs to do it and it was common for the software to just ask whether you were driving on the surface road or an elevated viaduct.
This seems like an entirely different level of craziness, though.